M2PA-5702-24E - Omron Automation and Safety

Pushbutton Switches

Authorized Distributor:

In the interest of product improvement, specifications are

subject to change without notice.

Cat. No. X032-E1-08 Printed in Japan

0206-1M (H)

OMRON Corporation

Industrial Automation Company

Sensing Devices Division H.Q.

Industrial Sensors Division

Shiokoji Horikawa, Shimogyo-ku,

Kyoto, 600-8530 Japan

Tel: (81)75-344-7022/Fax: (81)75-344-7107

ASIA/OCEANIA

JAPAN

■OMRON CORPORATION (Industrial)

Gate City Ohsaki, West Tower 14F, 1-11-1 Ohsaki,

Shinaga w a-ku, Tokyo, 141-0032 JAPAN

Tel: 81-3-3779-9001/Fax: 81-3-3779-9019

@OMRON CORPORATION

(Consumer & Commercial)

Gate City Ohsaki, West Tower 14F, 1-11-1 Ohsaki,

Shinaga w a-ku, Tokyo, 141-0032 JAPAN

Tel: 81-3-3779-8709/Fax: 81-3-3779-9047

CHINA

■OMRON (CHINA) CO., LTD. BEIJING OFFICE

32F, Tower B, Jianwai SOHO #39,

East 3rd. Ring Road, Chaoyang District,

Beijing, 100022 CHINA

Tel: 86-10-5869-3030/Fax: 86-10-5869-3815

@OMRON ELECTRONIC COMPONENTS (HONG

KONG) LTD. BEIJING OFFICE

32/F, Tower A, Jianwai SOHO, #39, East 3rd. Ring

Road, Chaoyang District, Beijing, 100022 CHINA

Tel: 86-10-5869-3131/Fax: 86-10-5869-0228

■OMRON ELECTRONIC COMPONENTS (HONG

KONG) LTD. SHANGHAI OFFICE

Room 2211, Bank of China Tower,

200 Yin Cheng Zhong Road,

PuDong New Area, Shanghai, 200120 CHINA

Tel: 86-21-5037-2222/Fax: 86-21-5037-2200

@OMRON (CHINA) CO., LTD. SHANGHAI OFFICE

Room 2503, Raffles City Shanghai (Office Tower),

No. 268 Xi Zang Middle Road, Huang Pu District,

Shanghai, 200001 CHINA

Tel: 86-21-6340-3737/Fax: 86-21-6340-3757

■OMRON ELECTRONICS GUANGZHOU LTD.

Room 2103, Guangzhou China Mayors Plaza,

No. 189, Tian He Bei Road, Guangzhou CHINA

Tel: 86-20-8732-0508/Fax: 86-20-8732-1750

@OMRON ELECTRONIC COMPONENTS (HONG

KONG) LTD. SHENZHEN OFFICE

Room 106, SEG Plaza, Huaqiang North Road,

Futian District, Shenzhen, 518031 CHINA

Tel: 86-755-8346-2220/Fax: 86-755-8346-2230

HONG KONG

■OMRON ELECTRONICS ASIA LTD.

Unit 601-9, Tower 2, The Gateway No. 25,

Canton Road, Tsimshatsui, Kowloon HONG KONG

Tel: 852-2375-387/Fax: 852-2375-1475

@OMRON ELECTRONIC COMPONENTS (HONG

KONG) LTD.

Unit 601-9, Tower 2, The Gateway No. 25,

Canton Road, Tsimshatsui, Kowloon, HONG KONG

Tel: 852-2375-3827/Fax: 852-2375-1475

INDIA

■OMRON ASIA PACIFIC PTE. LTD.

INDIA LIAISON OFFICE

M-45, Market Complex, Greater Kailash Part II,

New Delhi-110048 INDIA

Tel: 91-11-5163-8215/Fax: 91-11-5163-8218

@OMRON ELECTRONIC COMPONENTS PTE LTD,

INDIA LIAISON OFFICE

2nd Floor, Pathi Towers, No. 80-55 East End `B'

Main Road, Jayanagar IX Block, (Nr. Jayadeva Car-

diac Institute), Bangalore 560 069, INDIA

Tel: 91-80-5696-9638/Fax: 91-80-2663-1685

INDONESIA

■PT. OMRON ELECTRONICS

Graha Pratama Floor 3A, JL MT Haryono Kav. 15,

Jakarta Selatan INDONESIA 12810

Tel: 62-21-8370-9555/Fax: 62-21-8370-9550

@PT. OMRON MANUFACTURING OF INDONESIA

EJIP Industr ial Park Plot 5C,

Lemahabang Bekasi 17550, Jakarta INDONESIA

Tel: 62-21-897-5108/Fax: 62-21-897-5160

SOUTH KOREA

■OMRON ELECTRONIC COMPONENTS CO.,LTD.

307, Teheran Office Bldg. #707-38, Yeoksam-dong,

Gangnam-gu, Seoul KOREA

Tel: 82-2-567-5020/Fax: 82-2-567-5804

MALAYSIA

■OMRON ELECTRONICS SDN. BHD.

Unit No. 1101, Level 11, Uptown 1, No. 1,

Jalan SS 21/58, Damansara Uptown,

47400 Petaling Jaya, Selangor Darul Ehsan

MALAYSIA

Tel: 60-3-7688-2888/Fax: 60-3-7688-2833

■OMRON ELECTRONIC COMPONENTS PTE. LTD.

3A, Lot 4 Bangunan TH Uptown 3, Damansara

Uptown , No.3, J a la n SS 21/3 9, 4 7400 Petal ing J a ya,

Selangor Darul Ehsan, MALAYSIA

Tel: 60-3-7623-6300/Fax: 60-3-7665-0078

THE PHILIPPINES

■OMRON ASIA PACIFIC PTE. LTD.

MANILA REPRESENTATIVE OFFICE

2nd Floor, King's Court II Bldg,

2129 Don Chino Roces Avenue, 1231 Makati City,

Metro, Manila THE PHILIPPINES

Tel: 632-811-2831/Fax: 632-811-2583

@OMRON MALAYSIA SDN BHD, PHILIPPINES

REPRESENTATIVE OFFICE

U-1103, 11th Floow, ALPAP 2 Building, Investment

Cor. Trade Drive, Madrigal Business Park, Alabang

Muntinlupa City, THE PHILIPPI NES

Tel: 632-7723-667/Fax: 632-7723-665

SINGAPORE

■OMRON ELECTRONICS PTE. LTD.

55, Ubi Avenue 1, #05-01 SINGAPORE 408935

Tel: 65-6547-6789/Fax: 65-6547-6766

@OMRON ELECTRONIC COMPONENTS PTE. LTD.

140 Paya Lebar Road #04-11 A-Z Building

SINGAPORE 409015

Tel: 65-6848-8800/Fax: 65-6848-8811

TAIWAN

■OMRON TAIWAN ELECTRONICS INC.

6F, Home Young Bldg., No. 363,

Fu-Shing N. Road, Taipei TAIWAN ROC

Tel: 886-2-2715-3331/Fax: 886-2-2712-6712

■OMRON TAIWAN SYSTEM INC.

11F, No. 8, Chung Hsiao West Road, Sec 1, Taipei

TAIWAN

Tel: 886-2-2375-2200/Fax: 886-2-2375-2233

■OMRON ELECTRONIC COMPONENTS (HONG

KONG) LTD. TAIWAN BRANCH (*)

5F-3, No. 146, Song Jiang Road, Taipei, 10458,

TAIWAN ROC

Tel: 886-2-2521-2350/Fax: 886-2-2521-0686

THAILAND

■OMRON ELECTRONICS CO., LTD.

Rasa Tower 20th Floor, #555 Phaholyothin Rd.,

Chatuchak, Bangk ok 10900 THAILAND

Tel: 66-2-937-0500/Fax: 66-2-937-0501

@OMRON ELECTRONIC COMPONENTS CO., LTD.

Phaholythin Place Building, 41st Floor, 408/166,

Phaholythin Road, Samsen-nai, Phayathai,

Bangkok 10400 THAILAND

Tel: 66-2-619-0292/Fax: 66-2-619-0624-5

VIETNAM

■OMRON ASIA PACIFIC PTE. LTD.

HANOI/HCM REPRESENTATIVE OFFICE

2, Lang Ha, 6th Floor Vinacone x Building, Ha noi

VIETNAM

Tel: 844-831-3121/Fax: 844-831-3122

AUSTRALIA

■OMRON ELECTRONICS PTY. LTD.

71 Epping Road, North Ryde, Sydney NSW 2113

AUSTRALIA

Tel: 61-2-9878-6377/Fax: 61-2-9878-6981

NEW ZEALAND

■OMRON ELECTRONICS LTD.

65 Boston Road, Mt Eden Auckland

NEW ZEALAND

Tel: 64-9-358-4400/Fax:64-9-358-4411

NORTH/SOUTH AMERICA

UNITED STATE S

■OMRON ELECTRONICS LLC

One Commerce Drive Schaumburg, IL 60173-5302

U.S.A.

Tel: 1-847-843-7900/Fax: 1-847-843-7787

@OMRON ELECTRONIC COMPONENTS LLC

55 East Commerce Drive, Suit B, IL 60173 U.S.A.

Tel: 1-847-882-2288/Fax: 1-847-882-2192

CANADA

■OMRON CANADA INC.

885 Milner Av enue , Scarborough, Ontari o, M1 B 5V8

CANADA

Tel: 1-416-286-6465/Fax: 1-416-286-6648

BRAZIL

■OMRON ELECTRONICA DO BRASIL LTDA.

Av. Santa Catarina, 935 04378-300

São Paulo-SP-BRAZIL

Tel: 55-11-5564-6488/Fax: 55-11-5564-7751

EUROPE

AUSTRIA

■OMRON Electronics G.m.b.H

Brunner Strasse 81, Box 323, A-1230 Vienna

AUSTRIA

Tel: 43-1-801-90-0/Fax: 43-1-804-48-46

BELGIUM

■OMRON ELECTRONICS NV/SA

Stationsstraat 24 B-1702 Groot-Bijgaarden

BELGIUM

Tel: 32-2-4662-480/Fax: 32-2-4660-687

CZECH REPUBLIC

■OMRON ELECTRONICS Spol.s.r.o.

Jankovcova 53, 170 00 CZECH REPUBLIC

Tel: 420-234-602-602/Fax: 420-234-602-607

DENMARK

■OMRON ELECTRONICS A/S

Lykkebaekvej 2, DK-4600 Koege DENMARK

Tel: 45-43-44-0011/45-43-44-0211

FINLAND

■OMRON ELECTRONICS OY

Metsänpojankuja 5, FIN-02130 Espoo FINLAND

Tel: 358-207-464-200/Fax: 358-207-464-210

FRANCE

■OMRON ELECTRONICS S.a.r.l.

14, Rue de Lisbonne 93561 Rosny Sous Bois

FRANCE

Tel: 33-1-4974-7000/Fax: 33-1-4876-0930

@OMRON ELECTRONIC COMPONENTS EUROPE

B.V.

14, Rue de Lisbonne 93561 Rosny Sous Bois

FRANCE

Tel: 33-1-4974-7050/Fax: 33-1-4876-2795

GERMANY

■OMRON ELECTRONICS G.m.b.H.

Elisabeth-Selbert-Strasse 17, 40764 Langenfeld

GERMANY

Tel: 49-2173-6800-0/Fax: 49-2173-6800-400

@OMRON ELECTRONIC COMPONENTS EUROPE

B.V.

Gruber Strasse 60d, 85586 Poing GERMANY

Tel: 49-8121-77240/Fax: 49-8121-772440

HUNGARY

■OMRON ELECTRONICS Kft.

H-1046 Budapest Kiss Erno u. 1-3 HUNGARY

Tel: 36-1-399-3050/Fax: 36-1-399-3060

ITALY

■OMRON ELECTRONICS S.p.A.

Viale Certosa, 49 20149 Milano ITALY

Tel: 39-02-32681/Fax: 39-02-325154

@OMRON ELECTRONIC COMPONENTS EUROPE

B.V.

Viale Certosa, 49 20149 Milano ITALY

Tel: 39-02-3268-850/Fax: 39-02-3268-851

THE NETHERLANDS

■OMRON ELECTRONICS B.V.

Wegalaan 61, 2132 JD Hoofddorp, Postbus 582

2130 AN Hoofddorp THE NETHERLANDS

Tel: 31-23-568-1100/Fax: 31-23-568-1188

@OMRON ELECTRONIC COMPONENTS EUROPE

B.V.

Wegalaan 57, 2132 JD Hoofddorp

THE NETHERLANDS

Tel: 31-23-568-1200/Fax: 31-23-568-1212

NORWAY

■OMRON ELECTRONICS NORWAY AS

Ole Deviksvei 4, P. O. Box 109, Bryn, N-0611 Oslo

NORWAY

Tel: 47-2265-7500/Fax: 47-2265-8300

POLAND

■OMRON ELECTRONICS SP.Z.O.O

ul. Jana Sengera "Cichego" 1, 02-790 Warsaw

POLAND

Tel: 48-22- 645-7860/Fax: 48-22-645-7863

PORTUGAL

■OMRON ELECTRONICS LDA.

Rua de S. Tomé, Lote 131 2689-510 Prior-Velho

PORTUGAL

Tel: 351-21-942-9400/Fax: 351-21-941-7899

SPAIN

■OMRON ELECTRONICS S.A.

c/Arturo Soria 95, E-28027 Madrid SPAIN

Tel: 34-91-377-7900/Fax: 34-91-377-7956

@OMRON ELECTRONIC COMPONENTS EUROPE

B.V.

c/Arturo Soria 95, E-28027 Madrid SPAIN

Tel: 34-91-377-7900/Fax: 34-91-377-7987

SWEDEN

■OMRON ELECTRONICS AB

Norgegatan 1, P. O. Box 1275, SE-164 29 Kista

SWEDEN

Tel: 46-8-632-3500/Fax: 46-8-632-3510

@OMRON ELECTRONIC COMPONENTS EUROPE

B.V.

Norgegatan 1, S-164 32 Kista SWEDEN

Tel: 46-8-632-3500/Fax: 46-8-632-3535

SWITZERLAND

■OMRON ELECTRONICS AG

Sennweidstrasse 44 CH-6312 Steinhausen

SWITZERLAND

Tel: 41-41-748-1313/Fax: 41-41-748-1345

TURKEY

■OMRON ELECTRONICS LTD.

Altunizad e , Kis ikli Cad. N o: 2 A-B lok K . 2 TR- 3466 2

Uskudar - Istanbul TURKEY

Tel: 90-216-474-00-40/Fax: 90-216-474-00-47

UNITED KINGDOM

■OMRON ELECTRONICS LTD.

Opal Drive, Fox Milne, Milton Keynes MK15 0DG

UNITED KINGDOM

Tel: 44-1908-258-258/Fax: 44-1908-258-158

@OMRON ELECTRONIC COMPONENTS EUROPE

B.V.

1 Bishop Square, Hatfield Business Park, Hatfield,

Hertfordshire AL10 9NE United Kingdom

Tel: 44-870-750-5661/Fax: 44-870-750-5662

NOTE:

1. Each of OMRON Sales offices has its branch offices.

2. Some of abovementioned offices do not deal all of OMRON

products.

3. Contron Corporation is an independent distributor in Korea.

4. Information subject to change without notice.

This company mainly deals electronic components.

For the most up-to-date office information

please visit www.omron.com

OMRON SALES OFFICES As of October 2005 (IAB/ECB)

Warranty and Application Considerations

■Warranty and Limitations of Liability

■Application Considerations

Read and Understand this Catalog

Please read and understand this catalog be fore purchasing the product. Please consult your OMR ON representativ e if you hav e

any questions or comments.

Warranty and Limitations of Liability

WARRANTY

OMRON's exclusive warranty is that the products are free from defects in materials and workmanship for a period of one year

(or other period if specified) from date of sale by OMRON.

OMRON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, REGARDING NON-INFRINGEMENT,

MERCHANTABILITY, OR FITNESS FOR PARTICULAR PURPOSE OF THE PRODUCTS. ANY BUYER OR USER

ACKNOWLEDGES THAT THE BUYER OR USER ALONE HAS DETERMINED THAT THE PR ODUCTS WILL SUIT ABLY MEET

THE REQUIREMENTS OF THEIR INTENDED USE. OMRON DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR

IMPLIED.

LIMITATIONS OF LIABILITY

OMRON SHALL NO T BE RESPONSIBLE FOR SPECIAL, INDIRECT , OR CONSEQUENTIAL D AMAGES, LOSS OF PROFITS,

OR COMMERCIAL LOSS IN ANY WAY CONNECTED WITH THE PRODUCTS, WHETHER SUCH CLAIM IS BASED ON

CONTRACT, WARRANTY, NEGLIGENCE, OR STRICT LIABILITY.

In no e v ent sh all the resp onsibili ty of OMR ON f or any act e xceed th e individ ual price of the pro duct on wh ich liabi lity is asse rted.

IN NO EVENT SHALL OMRON BE RESPONSIBLE FOR WARRANTY, REPAIR, OR OTHER CLAIMS REGARDING THE

PRODUCTS UNLESS OMRON'S ANALYSIS CONFIRMS THAT THE PRODUCTS WERE PROPERLY HANDLED, STORED,

INSTALLED, AND MAINTAINED AND NOT SUBJECT TO CONTAMINATION, ABUSE, MISUSE, OR INAPPROPRIATE

MODIFICATION OR REPAIR.

Application Considerations

SUITABILITY FOR USE

OMRON shall not be responsible for conformity with any standards, codes, or regulations that apply to the combination of

products in the customer's application or use of the products.

At the custo mer 's request , OMR ON will pro vide ap plica bl e third party certifica tion doc uments ide ntifyi ng r atings and li mitati ons

of use that apply to the products. This information by itself is not sufficient for a complete determination of the suitability of the

products in combination with the end product, machine, system, or other application or use.

The following are some examples of applications for which particular attention must be given. This is not intended to be an

e xhausti ve list of all possib le uses of t he produc ts, n or is it intende d to imp ly that the uses listed m a y be su itabl e f or th e products.

•Outdoor use, uses involving potential chemical contamination or electrical interference, or conditions or uses not described in

this catalog.

•Nuclear energy control systems, combustion systems, railroad systems, aviation systems, medical equipment, amusement

machines, vehicles, safety equipment, and installations subject to separate industry or government regulations.

•Systems, machines, and equipment that could present a risk to life or property.

Please know and observe all prohibitions of use applicable to the products.

NEVER USE THE PRODUCTS FOR AN APPLICATION INVOLVING SERIOUS RISK TO LIFE OR PROPERTY WITHOUT

ENSURING THAT THE SYSTEM AS A WHOLE HAS BEEN DESIGNED T O ADDRESS THE RISKS , AND THAT THE OMR ON

PRODUCTS ARE PROPERLY RATED AND INSTALLED FOR THE INTENDED USE WITHIN THE O VERALL EQUIPMENT OR

SYSTEM.

■Disclaimers

■Copyright and Copy Permission

Disclaimers

PERFORMANCE DATA

Performance data given in this catalog is provided as a guide for the user in determining suitability and does not constitute a

warranty. It may represent the result of OMRON's test conditions, and the users must correlate it to actual application

requirements. Actual performance is subject to the OMRON Warranty and Limitations of Liability.

CHANGE IN SPECIFICATIONS

Product specifications and accessories may be changed at any time based on improvements and other reasons.

It is our practice to change model numbers when published ratings or features are changed, or when significant construction

changes are made. However, some specifications of the products may be changed without any notice. When in doubt, special

model n um be r s m ay be assigned to fix or es tablis h key sp ec ific at ions fo r y our applica tion on you r requ es t. Plea se con su lt with

your OMRON representative at any time to confirm actual specifications of purchased products.

DIMENSIONS AND WEIGHTS

Dimensions and weights are nominal and are not to be used for manufacturing purposes, even when tolerances are shown.

ERRORS AND OMISSIONS

The inf ormation i n this catal og has been ca refully chec ke d and is bel iev ed to be accurate; howe v er , no respon sibility is assume d

for clerical, typographical, or proofreading errors, or omissions.

This catalog shall not be copied for sales or promotions without permission.

This catalog is protected by copyright and is intended solely for use in conjunction with the products. Please notify us before

cop ying or reproducing this catalog in any manner , for an y other purpose. If copying or transmitting this catalog to another , please

copy or transmit it in its entirety.

Safety Precautions

■Meaning of Signal Words

The following signal word is used in this catalog.

■Meaning of Alert Symbols

The following alert symbol is used in this catalog.

■Alert Statement in this Catalog

The following alert statement applies to the products in this catalog. This alert statement also appears at the locations needed in

this catalog to attract your attention.

Please read the Technical Information section (page 8) and Safety Precautions for each model for other operation precautions.

@WARNING Indicates a potential ly hazardous situation which, i f not avoided, will result in minor or

moderate injury, or may result in serious injury or death. Additionally there may be

signif ic ant property damage.

Indicates the possibility of electric shock und er specific conditions.

@WARNING

Electric shock may possib ly occur. Do not perform wiring work or touch the charged parts of terminals while power

is supplied to the Switch.

CONTENTS

Selection Guide 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Technical Information 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Switches and Indicators with Round Bodies

A3D 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

M2D 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A3C 34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

M2C 47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A16 55. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A165S/W 83. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A165K 98. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A165E 112. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

M16 122. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

M2BJ-B 131. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A22 136. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A22S/W 166. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A22K 177. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A22E 184. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

M22 202. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Switches and Indicators with Square Bodies

A3A 210. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A3P 220. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

M2P 248. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Selection Guide

Classification Pushbutton switch

Model A3A A3C A3D

Appearance

Pushbutton shape

Panel cutout

dimensions 11.5 11.5, 11.5 dia. 12 dia. 8 dia.

Pushbutton color LED-lighted: red, yellow,

green

Non-lighted: red, yellow,

green, blue, gray, black,

light gray, dark gray

LED-lighted: red, yellow,

green, white

Incandescent lamp-lighted:

red, yellow, green, blue,

white

Non-lighted: red, yellow,

green, blue, white, black

LED-lighted: red,

yellow, green, white

Indicator type (see

note) NO YES YES

Switch color Black Black Black

Form SPST-NO, SPDT SPST-NO+

SPST-NC SPST-NO

Rated load

(resistive) 6 A, 125 VAC; 4 A,

30 VDC 0.5 A, 250 VAC; 1 A,

30 VDC 0.1 A, 30 VDC

Mechanical life

expectancy Momentary operation:

1,000 x 103 operations

min.

Alternate operation: 50 x

103 operations min. (high

capacitive load), 100 x 103

operations min.

(general-purpose, micro

loads)

Momentary operation:

1,000 x 103 operations

min.

Alternate operation: 100 x

103 operations min.

Momentary operation:

1,000 x 103

operations min.

Alternate operation:

100 x 103 operations

min.

Electrical life

expectancy 50 x 103 operations min.

(high capacitive load)

100 x 103 operations min.

(general-purpose load)

1,000 x 103 operations

min. (micro load)

100 x 103 operations min. 100 x 103 operations

min.

Mounting style Snap-in panel mounting

PC board mounted,

thru-panel

Nut mounting Nut mounting

Remarks Possible to switch wide

range of loads Accessories: socket,

insulation cover

Series product: micro load

type LED & lamp for A16

can be used.

Accessories: socket,

insulation cover

Approved standards RC RC ---

Page 210 34 20

Note: Indication function only

Selection Guide

Classification Pushbutton switch, knob-type selector switch,

key-type selector switch Pushbutton switch

Model A16 A22 A3PA A3PJ

Appearance

Pushbutton shape

Panel cutout

dimensions 16 dia. 22 dia. 23.5 22.5 23.5 30.5

Pushbutton color LED-lighted: red, yellow,

pure yellow, green, white,

blue

Incandescent

lamp-lighted: red, yellow,

green, pure yellow, white,

blue

Non-lighted: red, yellow,

pure yellow, green, white,

blue, black

LED-lighted: red, yellow,

green, white, blue

Incandescent

lamp-lighted: red, yellow,

green, white, blue

Non-lighted: red, yellow,

green, white, blue, black

Lighted with built-in LED: red, white, green, orange

Incandescent lamp-lighted: red, green, white, blue,

orange

LED-lighted: red, yellow, green, white (split types and

2-color types also available)

Indicator type (see

note) YES YES YES

Switch color Black Black, brown Light gray, black

Form SPDT, DPDT SPST-NO, SPST-NC,

SPST-NO+SPST-NC,

DPST-NO, DPST-NC

SPDT, DPDT

Rated load

(resistive) 5 A, 125 VAC;

3 A, 250 VAC;

3 A, 30 VDC

10 A, 110 VAC;

6 A, 220 VAC 3 A, 250 VAC; 3 A, 30 VDC

Mechanical life

expectancy Pushbutton Switch

Momentary operation:

2,000 x 103 operations

min.

Knob-type Selector

Switch

250 x 103 operations min.

Key-type Selector Switch

250 x 103 operations min.

Pushbutton Switch

5,000 x 103 operations

min.

Knob-type Selector

Switch Non-lighted: 500 x

103 operations min.

Lighted: 100 x 103

operations min.

Key-type Selector Switch

500 x 103 operations min.

Momentary operation: 1,000 x 103 operations min.

Alternate operation: 200 x 103 operations min.

Electrical life

expectancy Pushbutton Switch

100 x 103 operations min.

Knob-type Selector

Switch

100 x 103 operations min.

Key-type Selector Switch

100 x 103 operations min.

Pushbutton Switch

500 x 103 operations min.

Knob-type Selector

Switch Non-lighted: 500 x

103 operations min.

Lighted: 100 x 103

operations min.

Key-type Selector Switch

500 x 103 operations min.

100 x 103 operations min.

Mounting style Nut mounting Nut mounting Snap-in panel mounting

Remarks Accessories: extractor,

legend plate, screw fitting,

panel plug, lock ring

Accessories: contact

block, lamp socket,

mounting latch, legend

plate, metallic bezel ring,

sealing cap, control box,

snap-in legend plate

Accessories: socket, mounting plate, barrier, switch

guard, protective cover

Series product: Microload version

Approved standards RR

cRR

cRC

Page 55 136 220 220

Note: Indication function only

Selection Guide

Classification Pushbutton switch Buzzer

Model A3PT M2BJ-B

Appearance 58.4 44.5

Pushbutton shape

Panel cutout

dimensions 29 dia. 16 dia.

Pushbutton color LED-lighted: white, red, yellow, green

Incandescent lamp-lighted:

red, green, white, blue, orange

Non-lighted

Indicator type (see

note) YES NO

Switch color Light grey Black

Form SPDT, DPDT ---

Rated load

(resistive) 3 A, 250 VAC; 5 A, 125 VAC; 5 A, 8 VDC; 5 A, 14

VDC; 4A, 30 VDC; 0.4 A, 125 VDC; 0.2 A, 250 VDC

Mechanical life

expectancy Momentary operation:

1,000,000 operations min.

Alternate operation:

200,000 operations min.

---

Electrical life

expectancy 100,000 operations min. ---

Mounting style Spring mounting Nut mounting

Snap-in panel mounting

Remarks Same as the A3PA and A3PJ Buzzer only

Accessories: snap-in mounting leaf spring, panel plug

Approved standards RC ---

Page 220 131

Note: Indication function only

Technical Information Technical Information

Technical Information

Terms for Configuration and Structure

A Pushbutton Switch is a switch designed so that its contacts are opened and closed by depressing and releasing a pushbutton on the Switch in

the direction of its axis. Pushbutton Switches come in two categories: lighted and non-lighted. The structure of a typical Lighted Pushbutton

Switch is shown below. Broadly speaking, Lighted Pushbutton Switches are made up of the 5 sections shown below . Non-lighted Pushbutton

Switches are made up of 4 sections, the 5 sections shown below less the light source.

Structure of Typical Lighted Pushbutton Switch

Mounting Section

Used to secure the

body of the Switch to

the mounting panel.

Pushbutton

Movable

piece

Movable

spring

Terminal

Case

Movable

contacts

Pushbutton surface (illuminated surface)

Opens and closes electric circuit.

Pushbutton

Transmits external

force/movement to

the Switch.

Light Source

Controls the light

indication.

Case

Protects internal

mechanisms.

Mounting panel

Switch

Terms for Operating Action

Operation Explanation

Momentary operation The pushbutton returns to its original position after it is released.

Alternate operation The first time the pushbutton is pressed, an internal lock mechanism holds it in the same

position. The next time it is pressed, the lock is released and the pushbutton returns to its

original position.

Push-pull operation When the pushbutton is pressed, an internal lock mechanism holds it in the same position. The

pushbutton is returned to its original position when the pushbutton is pulled to release the lock.

Push-lock, turn-reset operation When the pushbutton is pressed, an internal lock mechanism holds it in the same position. The

pushbutton is returned to its original position when the pushbutton is twisted to release the

lock.

Technical Information Technical Information

Terms Related to Operating Characteristics

Classification Term Abbreviation Unit Definition

Force Operating Force OF N, N⋅mThe force (or torque) that must be applied to the pushbutton to

move it from the free position to the operating position.

Releasing Force RF N, N⋅mThe force (or torque) that must be applied to the pushbutton to

move it from the operating limit position back to the returned

position.

Total Travel Force TTF N, N⋅mThe force (or toque) on the pushbutton when it reaches the

stopper.

Position Free Position FP mm, (°)The position (or angle) of the pushbutton when there is no

external force applied to it.

Operating Position OP mm, (°)The position (or angle) of the pushbutton when the movable

contact changes from the free position state to the operating

position state due to an external force.

Release Position RP mm, (°)The position (or angle) of the pushbutton when the movable

contact changes from the operating position state to the free

position state due to the reduction of external force.

Total Travel Position TTP mm, (°)The position (or angle) of the pushbutton when it reaches the

stopper.

Set Position SP mm, (°)The position of an alternate operation pushbutton when it is in

the self-holding state, or the position (or angle) of a selector

switch when it is in the self-holding state.

Travel Pretravel PT mm, (°)The distance (or angle) through which the pushbutton moves

in going from the free position to the operating position.

Overtravel OT mm, (°)The distance (or angle) through which the pushbutton moves

in going from the operating position to the operating limit

position.

Movement Differential MD mm, (°)The distance (or angle) through which the pushbutton moves

in going from the operating position back to the returned

position.

Total Travel TT mm, (°)The distance (or angle) through which the pushbutton moves

in going from the free position to the operating limit position.

Releasing Travel RT mm, (°)The distance (or angle) through which the pushbutton moves

in going from the returned position to the free position.

Lock Travel Alternate LTA mm, (°)The distance (or angle) through which the pushbutton moves

in going from the free position to the set position.

Free position Operating

position Operating lim-

it position Returned

position Free

position Set

position

Terminal Symbols

Symbol Meaning

COM Common terminal

NC Normally closed terminal

NO Normally open terminal

Contact Form

Name Contact form

SPDT

SPST-NC

SPST-NO

Double-break

Technical Information Technical Information

General Terms

Term Explanation

Chameleon lighting Full-screen lighting in one of 3 colors: red, green, or orange. (Orange is produced by simultaneous illumination

of red and green.)

Simultaneity This term is used for switches that have more than one contact circuit. It indicates the difference in time or

position between the contacts when all the contacts of the switch are opened or closed in one operation.

LED lighting LED-lighted models are lit with an LED installed in the base of the Pushbutton Unit.

The LED is mounted internally; it cannot be removed.

LED-lamp lighting LED lamp-lighted models use the same light source as incandescent lamp-lighted models, with an LED

instead of a filament.

The Lamp (i.e., the LED lamp) and the Pushbutton Unit can be separated.

Pushbutton

Unit

LED lamp

Pushbutton

Unit

LED lamp

A16, M16 A3P

Incandescent lamp

lighting Incandescent lamp-lighted models are lit with an incandescent lamp.

The Lamp (i.e., the incandescent lamp) and the Pushbutton Unit can be separated.

Pushbutton

Unit

Incandescent

lamp

Pushbutton

Unit

Incandescent

lamp

A16, M16 A3P

Voltage Reduction

Unit For 16-dia. A16 (M16)

models, 22-dia. A22 (M22)

models, and 30-dia. A30

models

The Voltage Reduction Unit has a smoothing circuit and a resistance, and lights

the LED lamp by applying 110 (220) VAC/VDC directly to the Lamp terminals.

Matrix mounting Mounting several Switches in vertical and/or horizontal lines.

Locking Switches Switches that have the functionality to self-hold when the pushbutton is operated.

Horizontal

side-by-side mounting Mounting Switches side-by-side with the long side of the Switch (rectangular models) horizontal.

Vertical side-by-side

mounting Mounting Switches side-by-side with the long side of the Switch (rectangular models) vertical.

Technical Information Technical Information

Protection Ratings

Note: International protection degrees are determined by the following tests. Be sure to check the sealing capability under the actual operat-

ing environment and conditions before actual use.

IEC (International Electrotechnical Commission) Standards (IEC 60529 January

1997)

IP-jj

Degree of protection against water

Degree of protection against solid materials

International protection mark

Degree of Protection from Solid Materials

Degree Protection

0No protection

150 mm dia. Protects against penetration of any solid object, such as a hand, that is 50 mm or more in

diameter.

212.5 mm dia. Protects against penetration of any solid object, such as a finger, that is 12.5 mm or more

in diameter.

32.5 mm Protects against penetration of any solid object, such as a wire, that is 2.5 mm or more is

diameter.

41 mm Protects against penetration of any solid object, such as a wire, that is 1 mm or more in

diameter.

5Protects against penetration of dust of a quantity that may cause malfunction or obstruct

the safe operation of the product.

6Protects against penetration of all dust.

Technical Information Technical Information

Degree of Protection Against Water

Degree Protection Test method (with fresh water)

0No protection Not protected against

water. No test

1Protection against water

drops Protects against

vertical drops of

water towards the

product.

Water is dropped vertically

towards the product from the

test machine for 10 min. 200 mm

2Protection against water

drops Protects against

drops of water

approaching at a

maximum angle of

15° to the left, right,

back, and front of

vertical towards the

product.

Water is dropped for 2.5 min

each (i.e., 10 min in total)

towards the product inclined

15° to the left, right, back, and

front from the test machine.

200 mm

3Protection against sprinkled

water Protects against

sprinkled water

approaching at a

maximum angle of

60° from vertical

towards the product.

Water is sprinkled at a maximum

angle of 60° to the left and right

from vertical for 10 min from the

test machine

Water rate is 0.07 liter/min

per hole.

4Protection against water

spray Protects against

water spray

approaching at any

angle towards the

product.

Water is sprayed at any angle

towards the product for 10 min from

the test machine.

Water rate is 0.07 liter/min

per hole.

5Protection against water jet

spray Protects against

water jet spray

approaching at any

angle towards the

product.

Water is jet sprayed at any angle

towards the product for 1 min per

square meter for at least 3 min in

total from the test machine.

12.5 liter/min

2.5 to 3 m

Discharging nozzle: 6.3 dia.

6Protection against

high-pressure water jet spray Protects against

high-pressure water

jet spray

approaching at any

angle towards the

product.

Water is jet sprayed at any angle

towards the product for 1 min per

square meter for at least 3 min in

total from the test machine.

100 liter/min

2.5 to 3 m

Discharging nozzle: 12.5 dia.

7Protection underwater Resists the

penetration of water

when the product is

placed underwater at

specified pressure

for a specified time.

The product is placed 1 m deep in

water (if the product is 850 mm max.

in height) for 30 min. 1 m

8Protection underwater Can be used

continuously

underwater.

The test method is determined by the manufacturer and user.

Technical Information Technical Information

Terms Related to IEC947 and IEC950

No. Term Explanation

1Rated operating voltage (Ue) VAC: 120, 240, 380, 480, 500, 600

VDC: 125, 250, 440, 500, 600

2Rated operating current (Ie) Specified by the manufacturer on consideration of rated operating voltage (Ue), rated

frequency, rated energizing time, area of application, and type of enclosure protection.

3Rated insulation voltage (Ui) Determined by creepage distance and the dielectric strength.

The maximum Ue value must not exceed the maximum Ui value.

If there is no Ui value specified, the maximum Ue value is taken as the Ui value.

4Pollution degree 1. Either no pollutants are present, or only dried, non-conductive pollutants are present

(e.g., clean rooms).

2. Basically, only non-conductive pollutants are present, or only transient conductivity

occurs due to condensation (indoor locations, such as offices).

3. Conductive pollutants are present, or non-conductive pollutants are present in

locations where condensation is expected (e.g., factories).

4. Conductivity due to impurities is a constant possibility, or conductivity is caused by

conductive dust, rain, or snow (e.g., outdoor locations).

5Electric shock protection class Class I: These devices require grounding. Electric shock is prevented by basic

insulation and charged parts that would be subject to dangerously high

voltages if the insulation was damaged, are grounded.

Class II: Electric shocks are prevented by double insulation or enforced

insulation.

Class III: No countermeasures against electric shocks are required because

the electric circuits in use operate in a low-enough voltage range.

Class II: Electric shocks are prevented by double insulation or enforced insulation.

Class III: No countermeasures against electric shocks are required because the electric

circuits in use operate in a low-enough voltage range.

6 PTI Proof tracking index.

Specified CTI values (comparative tracking indices):

Materials satisfying the 175, 250, 300, 375, and 500 levels are denoted as PTI-175,

PTI-250, PTI-300, PTI-375, and PTI-500 respectively.

7 IP IP-jj

Degree of protection against water (See below.)

Degree of protection against solid materials (See below.)

Degree of Protection

The meanings of the IP numbers are given in the following table.

No. Degree of protection against solid materials Degree of protection against water

0No protection No protection

1Protects against penetration of any solid object, such as a

hand, that is 50 mm or more in diameter. Protects against vertical drops of water.

2Protects against penetration of any solid object, such as a

finger, that is 12.5 mm or more in diameter. Protects against drops of water approaching at a maximum

angle of 15° to the vertical.

3Protects against penetration of any solid object, such as a

wire, that is 2.5 mm or more is diameter. Protects against sprinkled water.

4Protects against penetration of any solid object, such as a

wire, that is 1 mm or more in diameter. Protects against water spray.

5Protects against penetration of dust of a quantity that may

cause malfunction or obstruct the safe operation of the

product.

Protects against water jet spray.

6Protects against penetration of all dust. Protects against high-pressure water jet spray.

Technical Information Technical Information

Common Precautions

For the individual precautions for a Switch, refer to the precautions

in the section for that Switch.

Cautions

Do not perform wiring or touch the charged parts of terminals while

power is being supplied to the Switch. Doing so may result in electric

shock.

Electrical Characteristics

Electrical Conditions

•The switching load capacity of the Switch greatly varies between

AC and DC. Always be sure to apply the rated load. The control

capacity will drastically drop if it is a DC load. This is because a

DC load has no current zero-cross point, unlike an AC load.

Therefore, if an arc is generated, it may continue for a

comparatively long time. Furthermore, the current direction is

always the same, which results in a contact relocation

phenomena whereby the contacts easily stick to each other and

do not separate when the surfaces of the contacts are uneven.

•Some types of load have a great difference between normal

current and inrush current. Make sure that the inrush current is

within the permissible value. The greater the inrush current in the

closed circuit is, the greater the contact abrasion or shift will be.

Consequently, contact weld, contact separation failures, or

insulation failures may result. Furthermore, the Switch may be

broken or damaged.

•If the load is inductive, counter-electromotive voltage will be

generated. The higher the voltage is, the higher the generated

energy will be, which will increase the abrasion of the contacts

and contact relocation phenomena. Be sure to use the Switch

within the rated conditions.

Inrush Current

i (Inrush current)

o (Steady-

state current)

•Approximate control capacities are given in ratings tables, but

these alone are insufficient to guarantee correct operation. For

special types of load, with unusual switching voltage or current

waveforms, test whether correct operation is possible with the

actual load before application.

•When switching for microloads (voltage or current), use a Switch

with microload specifications. The reliability of silver-plated

contacts, which are used in Switches for standard loads, will be

insufficient for microloads.

•When switching microloads or very high loads that are beyond

the switching capacity of the Switch, connect a relay suitable for

the load.

Type of Load vs. Inrush Current

Solenoid

(Approximately 10 to 20 times higher)

Incandescent

lamp (Approximately 10 to 15 times

higher) Motor

(Approximately

5 to 10 times

higher) Relay

(Approxi-

mately 4 to 5

times higher)

•All the performance ratings given are for operation under the

following conditions unless otherwise specified.

Inductive load: A minimum power factor of 0.4 (AC) and a maxi-

mum time constant of 7 ms (DC)

Lamp load: An inrush current 10 times higher than the

steady-state current

Motor load: An inrush current 6 times higher than the

steady-state current

Note: Inductive loads can cause problems especially in DC cir-

cuitry. Therefore, it is essential to know the time constants

(L/R) of the load.

Load Connections

Do not contact a single Switch to two power supplies that are differ-

ent in polarity or type.

Connection of Different Polarities

The power supply may short-circuit if the loads are connected in the

way shown in the “incorrect” example below.

Incorrect

Correct

Load

Even in the “correct” example, note that the insulation performance

of the switch may deteriorate and the switch life may be shortened

because loads are connected to both contacts.

Technical Information Technical Information

Connection of Different Power Supplies

The DC and AC power may be mixed for the circuit shown below.

Incorrect

Load

Do not design a circuit where voltage is imposed between contacts,

otherwise contact weld may result.

Incorrect

Load

Contact Protective Circuit

Apply a contact protective circuit to extend the contact life, prevent noise, and suppress the generation of carbide or nitric acid. Be sure to apply

the contact protective circuit correctly, otherwise an adverse effect may occur.

The following provides typical examples of contact protective circuits. If the Limit Switch is used in an excessively humid location for switching a

load that easily generates arcs, such as an inductive load, the arcs may generate NOx, which will change into HNO3 if it reacts with moisture.

Consequently, the internal metal parts may corrode and the Limit Switch may fail. Be sure to select the ideal contact preventive circuit from the

following.

Typical Examples of Contact Protective Circuits

Circuit example Applicable

current Feature Element selection

AC DC

CR circuit

Power

supply

Inductive

load

*Yes *When AC is switched, the load

impedance must be lower than the

CR impedance.

C: 1 to 0.5 µF x switching current (A)

R: 0.5 to 1 Ω x switching voltage (V)

The values may change according to

the characteristics of the load.

The capacitor suppresses the spark

discharge of current when the

contacts are open. The resistor limits

the inrush current when the contacts

Power

supply

Inductive

load

Yes Yes The operating time will be greater if

the load is a relay or solenoid.

Connecting the CR circuit in parallel

to the load is effective when the

power supply voltage is 24 or 48 V

and in parallel to the contacts when

the power supply voltage is 100 to

200 V.

the inrush current when the contacts

are closed again. Consider the roles

of the capacitor and resistor and

determine ideal capacitance and

resistance values through testing.

Basically, use a capacitor with a

dielectric strength between 200 and

300 V. When AC is switched, make

sure that the capacitor has no

polarity.

Diode method

Power

supply Inductive

load

No Yes Energy stored in the coil is changed

into current by the diode connected in

parallel to the load. Then the current

flowing to the coil is consumed and

Joule heat is generated by the

resistance of the inductive load. The

reset time delay with this method is

longer than that in the CR method.

The diode must withstand a peak

inverse voltage 10 times higher than

the circuit voltage and a forward

current as high or higher than the

load current.

Diode and

Zener diode

method Power

supply Inductive

load

No Yes This method will be effective if the

reset time delay caused by the diode

method is too long.

Use a Zener diode with a Zener

voltage that is approximately 1.2 ×

power supply voltage as, depending

on the environment, the load may not

operate.

Varistor

method

Power

supply

Inductive

load

Yes Yes This method makes use of

constant-voltage characteristic of the

varistor so that no high-voltage is

imposed on the contacts. This

method causes a reset time delay.

Connecting a varistor in parallel to

the load is effective when the supply

voltage is 24 to 48 V and in parallel to

the contacts when the supply voltage

is 100 to 200 V.

---

Technical Information Technical Information

Do not apply contact protective circuits as shown below.

This circuit effectively suppresses arcs

when the contacts are OFF. The capacitor

will be charged, however, when the

contacts are OFF. Consequently, when the

contacts are ON again, short-circuited

current from the capacitance may cause

contact weld.

This circuit effectively suppresses arcs

when the contacts are OFF. When the

contacts are ON again, however, charge

current will flow to the capacitor, which may

result in contact weld.

Power

supply Load

IncorrectIncorrect

Incorrect

Power

supply Load

Switching a D C inductive load is usually more dif ficult than switching

a resistive load. By using an appropriate contact protective circuit,

however, switching a DC inductive load will be as easy as switching

a resistive load.

Switching

•Do not use the Switch for loads that exceed the rated switching

capacity or other contact ratings. Doing so may result in contact

weld, contact separation failures, or insulation failures.

Furthermore, the Switch may be broken or damaged.

•Do not touch the charged switch terminals while power is

supplied, otherwise an electric shock may be received.

•The life of the Switch varies greatly with switching conditions.

Before using the Switch, be sure to test the Switch under actual

conditions. Make sure that the number of switching operations is

within the permissible range.

If a deteriorated Switch is used continuously, insulation failures,

contact weld, contact failures, switch damage, or switch burnout

may result.

•Do not apply excessive or incorrect voltages to the Switch or

incorrectly wire the terminals. Otherwise, the Switch may not

function properly and have an adverse effect on external

circuitry. Furthermore, the Switch itself may become damaged o r

burnt.

•Do not use the Switch in locations where flammable or explosive

gases are present. Otherwise switching arcs or heat radiation

may cause a fire or explosion.

•Do not drop or disassemble the Switch, otherwise it may not be

capable of full performance. Furthermore, it may be broken or

burnt.

Mechanical Conditions

Operating Force and Operating Method

•Fingertip operation is an important feature of Pushbutton

Switches. In terms of Switch operation, Pushbutton Switches

differ greatly from detection switches such as Microswitches.

Operating the Switch using a hard object (e.g., metal), or with a

large or sudden force, may deform or damage the Switch,

resulting in faulty or rough operation, or shortening of the Switch

life. The strength varies with the size and construction of the

Switch. Use the appropriate Switch for the application after

confirming the operating method and operating force with this

catalog.

Hammer

Do not apply

excessive or

sudden force.

Incorrect

•The pushbutton surface is composed of resin. Therefore, do not

attempt to operate the pushbutton using a sharp object, such as

a screwdriver or a pair of tweezers. Doing so may damage or

deform the pushbutton surface and result in faulty operation.

Do not use

sharp objects.

Screwdriver

Tweezers

Incorrect

Mounting

•Switches can be broadly divided into two categories according to

mounting method: panel-mounting models and PCB-mounting

models. Use the appropriate model for the mounting method

required. Basically, panel-mounting Switches can withstand a

greater operating force than PCB-mounting Switches. If,

however, the panel thickness or the panel-cutout dimensions are

not suitable for the Switch, it may not be able to withstand the

normal operating force. With continuous mounting in particular,

select a panel of a thickness that is easily suf ficient to withstand

the total operating force.

•Panel-mounting Switches can be divided into two categories

according to the mounting method: snap-in mounting models

and screw-mounting models. Snap-in mounting Switches are

held in place with the elasticity of resin or a metal leaf spring. Do

not attempt to modify the spring after mounting. Doing so may

result in faulty operation or damage the mounting structure.

Mount screw-mounting models using the screws and nuts

provided (or individually specified). Tighten the screws to the

specified torque. Mounting with different screws or nuts, or

tightening beyond the specified torque may result in distortion of

the inside of the case or damage to the screw section.

Snap-in Mounting Screw Mounting

Do not attempt to

modify the spring

after mounting.

Use the

screws and

nuts provided

(or specified).

•Subjecting the Switch to severe vibrations or shock may result in

faulty operation or damage. Also, many of the Switches are

Technical Information Technical Information

composed of resin so contact with sharp objects may result in

damage to the surface. This kind of damage may spoil the

appearance of the Switch or result in faulty operation. Do not

throw or drop the Switch.

Do not drop ob-

jects or place

heavy objects on

the Switch.

Do not drop or

knock the Switch.

Do not operate the

Switch with heavy

or sharp objects.

Hammer Screwdriver

Incorrect

Mounting Precautions

Wiring

•Perform wiring so that the lead wires will not be caught on other

objects as this will cause stress on the Switch terminals. Wire the

Switch so that there is slack in the lead wires and fix lead wires at

intermediate points. If the panel to which the Switch is mounted

needs to be opened and closed for maintenance purposes,

perform wiring so that the opening and closing of the panel will

not interfere with the wiring.

Incorrect

Correct

•With miniature Switches, the gap between the terminals is very

narrow. Use protective or heat-absorbing tubes to prevent

burning of the wire sheath or shorting.

Protective tube

IncorrectCorrect

Soldering

•There are two methods for soldering the Switch: hand soldering

and automatic soldering. In addition, automatic soldering itself

can be divided into two types : dip soldering and reflow soldering.

Use the soldering method appropriate for the mounting method.

The following table gives some examples of applications using the

types of soldering given above.

Technical Information Technical Information

Method Soldering

device Application

Hand soldering Soldering iron Small quantities

Different

materials

Lead wire

terminals

Automatic

soldering Dip

soldering Jet soldering

bath

Dip soldering

bath

Large quantities

of discrete

terminals

Reflow

soldering Infrared reflow

(IR) soldering

bath

Vapor-phase

(VPS) reflow

soldering bath

Large quantities

of miniature

SMD terminals

•Do not use soldering flux that contains chlorine. Doing so may

result in metal corrosion.

•Perform hand soldering using the appropriate soldering iron.

Perform soldering for be-

tween 3 to 5 s with a suit-

able soldering iron.

Incorrect

Correct

Incorrect

Large-

capacity

soldering

iron

Lead wire

Small-capacity

soldering iron

used for a long

time

Terminal

•With the exception of PCB-mounting Switches, when performing

hand soldering, hold the Switch so that the terminals point

downwards so that flux does not get inside the Switch.

Incorrect Correct

•Leave a gap of at least 1 mm between the soldered parts and the

surface of the case so that flux does not get inside the Switch.

Case

Terminal

Solder

Lead wire

1 mm min.

•When applying flux using a brush, use a sponge soaked in flux as

shown below. Do not apply more than is necessary. Also, apply

the flux with the PCB inclined at an angle of less than 80° so that

flux does not flow onto the mounting surface of the Switch.

Brush

Sponge

soaked in flux

Flux

Brush

80°C

max.

Incorrect

Correct

•Do not place PCBs that have had flux applied or have been

soldered on top of each other. Otherwise, the flux on the PCB’s

solder surface may stain the upper part of the Switch or even

permeate the inside of the Switch and cause contact failure.

Do not place PCBs

with solder or flux on

top of each other.

Flux

Incorrect

Technical Information Technical Information

•When performing soldering with a dip soldering bath, ensure that

the flux does not reach a higher level than the PCB.

Incorrect

Correct

•Flux is especially likely to rise up at the edges of the PCB. If the

Switch is mounted near the edge of the PCB, create a gap

between the edge by using a split PCB, and insert the PCB in the

soldering bath so that the edge that is farthest from the Switch

enters the bath first.

Create distance

Create gap

Split PCB

Flux is

more likely

to rise at

the edges.

Insert in soldering

bath from this

edge.

Storage

•When the Switch is left unused or stored for long periods, the

ambient conditions can have a great effect on the condition of the

Switch. In certain environments, leaving the Switch exposed

may result in deterioration (i.e., oxidation, or the creation of an

oxide film) of the contacts and terminals, causing the contact

resistance to increase, and making it difficult to solder the lead

wires. Therefore, store in a well-ventilated room, inside, for

example, a non-hygroscopic case, in a location where no

corrosive gases are present.

•If the Switch is stored in a location where it will be exposed to

direct light, colored resin in the colored plate may fade.

Therefore, do not store the Switch in locations where it will be

exposed to direct light.

Lighted Pushbutton Switch A3D

Lighted Pushbutton Switch with

Cylindrical 18-mm × 8-dia. Body

Good illumination with even surface brightness.

Cylindrical body means panel cutouts can be made

easily.

Combines miniature design with excellent operat-

ing sensitivity.

Ordering Information

Model Number Legend:

The model numbers used to order sets of Units are illustrated below. One set comprises the Pushbutton (LED lamp built-in) and Switch.

A 3 D J - 9 0 A 1 - 0 0 E R

(1) (2) (3)

(1) Shape of Pushbutton

Symbol Shape

J Rectangular

A Square

T Round

(3) Color of Pushbutton

Symbol Color

R Red

Y Yellow

G Green

W White

All models are illumination

only. Colored-illumination mod-

els are not available.

Non-lighted models are not

available.

An external resistor is

required. (Refer to page 28.)

Symbol Terminals Operation Contact

A Momentary

B Alternate

Solder

Minimum applicable load: 1 mA at 5 VDC

Standard load models are not available.

If PCB terminals are required, use the Socket

given under Accessories on page 22.

Momentary operation: Self-resetting

Alternate operation: Self-holding

(2) Switch Specifications

Microload (30 VDC, 0.1 A)

SPST-NO

List of Models

Appearance Model

Rectangular A3DJ

Square A3DA

Round A3DT

A3D A3D

Ordering as a Set

The model numbers used to order sets of Units are given in the following table. One set comprises the Pushbutton (LED lamp built-in), and

Switch.

Appearance Degree of protection Operation Model number Color symbol for

Pushbutton

A3DJ (Rectangular) IP40 Momentary A3DJ-90A1-00EjR, Y, G, W

Alternate A3DJ-90B1-00Ej

A3DA (Square) Momentary A3DA-90A1-00Ej

Alternate A3DA-90B1-00Ej

A3DT (Round) Momentary A3DT-90A1-00Ej

9 dia. Alternate A3DT-90B1-00Ej

Note: 1. Enter the desired color symbol for the Pushbutton in j.

2. All the above are solder-terminal, microload, SPST-NO, LED lamp-lighted models.

Ordering Individually

Pushbuttons and Switches can be ordered separately. Combinations that are not available as sets can be created using individual Units. Also,

store the parts as spares for maintenance and repairs.

Pushbutton (LED built-in)

Switch

A3D A3D

Pushbutton (All Lighted with LED Built-in)

Appearance Rectangular Square Round

Color

Red A3DJ-500R A3DA-500R A3DT-500R

Yellow A3DJ-500Y A3DA-500Y A3DT-500Y

Green A3DJ-500GY A3DA-500GY A3DT-500GY

White A3DJ-500W A3DA-500W A3DT-500W

Switch

Sealing IP40

Appearance Rectangle Square Round

Contact type Operating action Terminal type

SPST-NO Momentary Solder terminals A3DJ-7111 A3DA-7111 A3DT-7111

Alternative Solder terminals A3DJ-7121 A3DA-7121 A3DT-7121

Accessories (Order Separately)

Name Appearance Classification Model Application

precautions

Socket Wire-wrap terminal A3D-4101 Cannot be used together

with Insulation Cover

PCB terminal A3D-4102 w

ith

nsu

over.

Solder terminal A3D-4103

Insulation Cover --- A3D-3002 Cannot be used together

with the Socket.

Tightening Tool --- A3D-3004 Do not tighten to a

torque exceeding

0.29 N⋅m.

Legend Plate Rectangular A3DJ-5201 One milky-white Legend

Plate is included with

Square A3DA-5201 Plate is included with

standard products.

Round A3DT-5201

standard

products

A3D A3D

Specifications

Ratings

Contact Rating: 30 VDC, 0.1 A (Minimum Appli-

cable Load: 5 VDC, 1 mA)

The above ratings conform to JIS C4505, for testing under the fol-

lowing conditions.

1. Load: Resistive load

2. Mounting conditions: No vibration or shock

3. Ambient temperature: 20 $2_C.

4. Operating frequency: 20 times/min.

Built-in LED Lamp

Item Color

Red Yellow (White)

(See note 4.) Green

Forward voltage, VFReference value (See note 3.) 1.7 V 2.2 V 2.1 V

g, F

Maximum value 2.0 V 2.5 V 2.5 V

Forward current, IFReference value 20 mA 20 mA 20 mA

Absolute maximum value 50 mA 50 mA 50 mA

Permissible dissipation, PD Absolute maximum value 100 mW 125 mW 122 mW

Reverse voltage, VRAbsolute maximum value 4 V 4 V 4 V

Note: 1. The above ratings are for an ambient temperature of 25°C.

2. The built-in LED lamp has no limiting resistor and so it is necessary to connect an external resistor within the range shown in the

above table. (For details of calculation formulas, refer to page 28.)

3. Refer to the characteristic graphs of VF – IF on page 24.

4. The same LED lamp is used for both yellow illumination and white illumination and so the ratings are the same.

Characteristics

Operating frequency Mechanical: 120 operations/minute max. (See note 1.)

Electrical: 20 operations/minute max.

Insulation resistance 100 MΩ min. (at 500 VDC)

Dielectric strength 1,000 VAC, 50/60 Hz for 1 minute between terminals of same polarity

2,000 VAC, 50/60 Hz for 1 minute between terminals of different polarity, and between each

terminal and ground

1,000 VAC, 50/60 Hz for 1 minute between lamp terminals (See note 2.)

Vibration resistance Malfunction: 10 to 55 Hz, 1.5 mm double amplitude (See note 3.)

Shock resistance Destruction: 500 m/s2

Malfunction: 150 m/s2 (See note 3.)

Life expectancy Mechanical:

Momentary operation models: 1,000,000 operations min.

Alternate operation models: 100,000 operations min.

(One operation consists of set and reset operations.)

Electrical: 100,000 operations min.

Weight Approx. 3 g

Ambient operating temperature –10_C to 55_C (with no icing or condensation)

Ambient operating humidity 35% to 85%

Ambient storage temperature –25_C to 65_C

Degree of protection IP40

Electric shock protection class Class II

PTI (proof tracking index) 175

Pollution degree 3 (IEC947-5-1)

Note: 1. With alternate operation models, 60 operations/minute max. One operation cycle consists of set and reset operations.

2. The figure for dielectric strength between lamp terminals is for when the LED lamp is not mounted.

3. “Malfunction” in the above table indicates malfunctions of less than 1 ms.

A3D A3D

Operating Characteristics

OF max. 2.45 N

RF min. 0.196 N

TT Approx. 3.5 mm

LTA min. (See note.) 0.5 mm

PT max. 2.5 mm

Note: The figure for LTA in the table applies only to models with

alternate operation.

Contact Form

Contact name Contact form

SPST-NO COM NO

Engineering Data

LED Characteristics

Ta: Ambient Temperature

VF – IF Characteristic

for Red LED VF – IF Characteristic

for Yellow or White LED VF – IF Characteristic

for Green LED Forward Current

Reduction Curve

VF (V) VF (V) VF (V) TA (°C)

I (mA)F

A3D A3D

Nomenclature

Color cap

Legend plate (milky white)

Reflective plunger

LED

Pushbutton

Shape of Pushbutton

Square (A3DA) Round (A3DT)

Rectangular (A3DJ)

Color of Pushbutton

(All models LED-lighted)

Red, yellow, green, white

Note: The LED lamp is built

into the Pushbutton.

Switch

Switch Specifications

Microload

0.1 A at 30 VDC

Minimum applicable load: 1 mA at 5 VDC

Note: The A3DJ model is shown here as a representative example.

A3D A3D

Dimensions

Note: All units are in millimeters unless otherwise indicated.

Rectangular Models (A3DJ)

Round Models (A3DT)

Square Models (A3DA)

9 dia. 7.4 dia.

Terminals

Solder Terminals of SPST-NO Lighted Models

Terminal Arrangement

(Bottom View)

LED terminal (t0.3)

0.8 2

Panel Cutouts (Top View)

Rectangular models (A3DJ) Square models (A3DA) and

round models (A3DT)

8+0.2

0 dia. 15 min.

10 min.

Note: Recommended panel

thickness: 1.0 to

3.2 mm.

8+0.2

0 dia. 10 min.

Note: Recommended panel

thickness: 1.0 to

3.2 mm.

Accessory Mounting Dimensions

Socket Mounting Dimensions

Wire-wrap Terminal

A3D-4101 PCB Terminal

A3D-4102 Solder Terminal

A3D-4103

PCB Cutout (bottom view)

Four, 0.8 dia.

9 dia. 9 dia. 9 dia.

A3D A3D

Insulation Cover Mounting Dimensions

A3D-3002

8.9 dia.

Note: 1. The diagram above shows the rectangular model as a

representative example.

2. Unless specified, there is a tolerance of ±0.4 mm for

dimensions.

•After securing the Switch to the panel using the mounting nut,

pass the lead wires through the holes in the Insulation Cover

before performing wiring. Hold the Insulation Cover so that the

cylindrical hole is facing the Switch, and insert the lead wires

from the end with the barriers.

•After wiring is completed, mount the Insulation Cover by pushing

it into the Switch.

Legend Plate Mounting Dimensions

Rectangular

A3DJ-5201

Square

A3DA-5201

Round

A3DT-5201

5.8 dia.

Note: 1. The thickness is 0.8 mm.

2. Since the legend plate is made of polycarbonate, use alcohol-based paints such as melanin, phthalic acid, or acryl paint when

marking the legend.

Installation

Mounting and Replacing the Pushbutton

Mounting Direction for the Pushbutton and Switch

Projection

Switch Pushbutton

Curved claw

Align the curved claw on the outside of the protruding part of the

Pushbutton with the projection on the upper part of the Switch and

insert.

Apply a pressure between 9.8 and 24.5 N.

Note: If the terminals of the LED lamp become bent, it may be

impossible to fit them into the LED lamp terminal holes.

Ensure that the terminals are straight when they are

inserted. Be sure to insert the lamp terminals for round

models with the correct orientation. Inserting the terminals

with the reverse orientation will result in damage.

Removing the Pushbutton

Recessed

portions

Hold the recessed portions on the cap of the Pushbutton and pull.

Note: Do not use tools such as pliers to remove the Pushbutton as

this may damage the cap.

Panel Mounting

Using the Mounting Nut

Insert the Switch from the front of the panel. Mount the mounting nut

from the terminal end of the Switch and tighten it.

Tighten the nut to a torque 0.20 to 0.39 N⋅m.

If soldering is used, mount the mounting nut first. Lead wires and

mounds o f solder may make it impossible to mount the nut after sol-

dering.

Panel Mounting nut

Socket Mounting

After securing the Switch to the panel using the mounting nut, insert

the Socket into the Switch.

When inserting the Socket, align the positioning groove of the

Socket with the projecting part of the Switch.

Panel

Projecting part of Switch

Positioning groove of Socket

A3D A3D

Precautions

Refer to the Common Precautions for Pushbutton Switches on

page 14.

Correct Use

Mounting

Always make sure that the power is turned OFF before mounting,

removing, or wiring the Switch, or performing maintenance.

Do not tighten the mounting ring excessively using pliers or a similar

tool. Excessive tightening may damage the mounting ring. (T ighten-

ing torque: 0.20 to 0.29 N⋅m)

Wiring

When wiring, use wires of a size appropriate for the applied voltage

and carry current. Perform soldering correctly under the conditions

given below. Using the Switch with the wires soldered incorrectly

may cause the terminals to become abnormally hot and cause a fire.

1. Hand soldering: At 30 W within 5 seconds.

2. Dip soldering: At 240°C within 3 seconds.

Wait for one minute after soldering before exerting any external

force on the solder.

Use a non-corrosive rosin liquid for the flux.

Perform wiring so that the wire sheaths do not come into contact

with the Switch. If this is unavoidable, use wires that can withstand

temperatures of 100°C min.

After wiring to the Switch has been completed, ensure an appropri-

ate insulation distance.

LED

The polarity of the LED is indicated on the back of the Switch. Wire

the LED correctly according to the polarity.

The built-in LED does not have a limiting resistor. Connect a limiting

resistor.

Make sure that the limiting resistor satisfies the characteristics of

the built-in LED. The forward current of the built-in LED must be

8 mA minimum.

The resistance can be calculated by using the following expression.

R = (E –VF)/IF (Ω)

E: Operating voltage (V)

VF: LED forward voltage (V)

IF: LED forward current (A)

Recommended Values for Limiting Resistance

Voltage Red Yellow

(White) Green

5 VDC 165 Ω140 Ω145 Ω

12 VDC 515 Ω490 Ω495 Ω

24 VDC 1,100 Ω1,090 Ω1,095 Ω

Note: The above values are calculated values that can be used as

reference.

Calculation Example for Limiting Resistance

Conditions: Red LED with an IF of 20 mA at 24 V and a Ta of 25°C.

From the red LED characteristic given previously, VF will be 1.7 V

when IF is 20 mA. Therefore, R = (24 V – 1.7 V)/0.02 A = 1,100 Ω.

Thus the recommended resistance is 1.1 kΩ at 1 W (2 x IF2R). (see

note)

Note: A factor of 2 is applied because the permissible wattage of

the resistor must be twice as large as the required wattage.

Operating Environment

Ensure that dust, metal powder, or oil do not enter the interior of the

Switch.

Using Microloads

Using a standard load switch for opening and closing a microload

circuit may cause wear on the contacts. Use the switch within the

operating range. (Refer to the diagram below.) Even when using mi-

croload models within the operating range shown below, if inrush

current occurs when the contact is opened or closed, it may cause

the contact surface to become rough, and so decrease life expec-

tancy. Therefore, insert a contact protection circuit where neces-

sary. The minimum applicable load is the N-level reference value.

This value indicates the malfunction reference level for the reliability

level o f 60% (λ 60) (conforming to JIS C5003). The equation, λ 60 =

0.5 x 1 0–4/times indicates that the estimated malfunction rate is less

than 1/2,000,000 with a reliability level of 60%.

Standard

load area

Microload

area

Invalid

area

Voltage (V)

Current (mA)

ALL DIMENSIONS SHOWN ARE IN MILLIMETERS.

To convert millimeters into inches, multiply by 0.03937. To convert grams into ounces, multiply by 0.03527.

Cat. No. A031-E1-05

Indicator M2D

Cylindrical 8-dia. Indicator

Same basic design as the A3D Pushbutton Switch.

Good illumination with even surface brightness.

Cylindrical body means panel cutouts can be made

easily.

Ordering Information

Model Number Legend:

The model numbers used to order sets of Units are illustrated below. One set comprises the Display (LED lamp built-in) and Socket Unit.

M 2 D J - 9 0 A 1 - 0 0 E R

(1) (2) (3)

(1) Shape of Display

Symbol Shape

J Rectangular

A Square

T Round

(3) Color of Display

Symbol Color

R Red

Y Yellow

G Green

W White

All models are illumination-

only. Colored-illumination mod-

els are not available.

An external resistor is

required. (Refer to page 28.)

Symbol Terminal type

A Solder terminals

If PCB terminals are required,

use the Socket given under

Accessories on page 22.

(2) Terminal Type

List of Models

Appearance Model

Rectangular M2DJ

Square M2DA

Round M2DT

M2D M2D

Ordering as a Set

The model numbers used to order sets of Units are given in the following table. One set comprises the Display (LED lamp built-in), and Socket

Unit.

Appearance Degree of protection Model number Color symbol for Display

Rectangular IP40 M2DJ-90A1-00EjR, Y, G, W

Square M2DA-90A1-00Ej

Round

9 dia.

M2DT-90A1-00Ej

Note: 1. Enter the desired color symbol for the Display in j: R (red), Y (yellow), G (green), or W (white)

2. Degree of protection: IP40

Ordering Individually

Displays and Socket Units can be ordered separately. Combinations that are not available as sets can be created using individual Units. Also,

store the parts as spares for maintenance and repairs.

Display (LED built-in)

Note: Degree of protection: IP40

Socket Unit

Display (All Lighted with LED Built-in)

Appearance Rectangular Square Round

Color

Red M2DJ-500R M2DA-500R M2DT-500R

Yellow M2DJ-500Y M2DA-500Y M2DT-500Y

Green M2DJ-500GY M2DA-500GY M2DT-500GY

White M2DJ-500W M2DA-500W M2DT-500W

M2D M2D

Socket Unit

Sealing IP40

Appearance Rectangle Square Round

Terminal type

Solder terminals M2DJ-7001 M2DA-7001 M2DT-7001

Accessories

The accessories for the A3D Lighted Pushbutton Switch can also be used with the M2D. Refer to page 22.

Specifications

Ratings

Built-in LED Lamp

Item Color

Red Yellow (White)

(See note 4.) Green

Forward voltage, VFReference value (See note 3.) 1.7 V 2.2 V 2.1 V

g, F

Maximum value 2.0 V 2.5 V 2.5 V

Forward current, IFReference value 20 mA 20 mA 20 mA

Absolute maximum value 50 mA 50 mA 50 mA

Permissible dissipation, PD Absolute maximum value 100 mW 125 mW 122 mW

Reverse voltage, VRAbsolute maximum value 4 V 4 V 4 V

Note: 1. The above ratings are for an ambient temperature of 25°C.

2. The built-in LED lamp has no limiting resistor and so it is necessary to connect an external resistor within the range shown in the

above table. (For details of calculation formulas, refer to page 28.)

3. Refer to the characteristic graph of VF – IF on page 24.

4. The same LED lamp is used for both yellow illumination and white illumination and so the ratings are the same.

Characteristics

Ambient operating temperature –10_C to 55_C (with no icing or condensation)

Ambient operating humidity 35% to 85%

Ambient storage temperature –25_C to 65_C

M2D M2D

Nomenclature

Color cap

Legend plate (milky white)

Reflective plunger

LED

Display

Shape of Display

Square Round

Rectangular

Color of Display

(All models LED-lighted)

Red, yellow, green, white

Note: The LED lamp is built into

the Display.

Socket Unit

Note: The M2DJ model is shown here as a representative example.

Dimensions

Note: All units are in millimeters unless otherwise indicated.

Rectangular Models

(M2DJ-90A1-00Ej)

Square Models

(M2DA-90A1-00Ej)

Square Models

(M2DT-90A1-00Ej)

7.4 dia.9 dia.

Note: Unless specified, there is a tolerance of ±0.4 mm for dimensions.

M2D M2D

Terminals

Solder Terminals

0.8 2LED terminal (±0.3)

Panel Cutouts (Top View)

Rectangular models (M2DJ) Square models (M2DA) and

round models (M2DT)

8+0.2

0 dia. 15 min.

10 min.

Note: Recommended panel

thickness: 1.0 to

3.2 mm.

8+0.2

0 dia. 10 min.

Note: Recommended panel

thickness: 1.0 to

3.2 mm.

Note: If the panel is to be finished (e.g., coated), make sure that

the panel meets the specified dimensions after the coating.

Precautions

Correct Use

Refer to the Common Precautions for Pushbutton Switches on page 14.

Refer to Correct Use for A3D on page 28.

ALL DIMENSIONS SHOWN ARE IN MILLIMETERS.

To convert millimeters into inches, multiply by 0.03937. To convert grams into ounces, multiply by 0.03527.

Cat. No. A122-E1-02

Lighted Pushbutton Switch A3C

Cylindrical 12-dia. Series with Superb

Operability, High Visibility, and Compact

Housing

Three models of Pushbuttons (round, square, and

rectangular), two types of light-emitting elements

(LED lamp and incandescent lamp), and two types

of Switches (switching standard loads and

microloads) available.

Models that can be used as an indicator also

available.

Requires only 20 mm mounting depth

Efficiency i n w iring improved by terminals arranged

on the same surface.

All LED lamps, incandescent lamps, caps, and

legends replaceable without tools.

UL (E41515) and CSA (LR45258) approved.

Ordering Information

Model Number Legend

When placing your order, specify the individual component part model numbers of the Pushbutton, Lamp (lighted models only), and Switch, as

listed in the ordering tables below.

A 3 C J - 9 0 A 1 - 24E R

(1) (2) (3) (4)

(1) Shape of Pushbutton

Symbol Shape

J Rectangular

A Square

T Round

(2) Terminal Type

Symbol Type

0 Solder terminal

Microload

Standard Load

0.5 A at 250 VAC

1 A at 125 VAC

1 A at 30 VDC

Microload

0.1 A at 125 VAC

0.1 A at 30 VDC

Minimum applicable load

1 mA at 5 VDC

Momentary-action: Self-resetting

Alternate-action: Self-holding

“Colored-illumination” models

operate in the way shown

below:

Unlit Lit

White Color

The built-in LED

is colored.

(4) Lighted/Non-lighted

Symbol Type

0 Non-lighted

1 Illumination only

(5) Lighting Method

Symbol Operating voltage

05E 5 VDC

12E 12 VDC

24E 24 VDC

LED Lamp-lighted Models

Incandescent Lamp-

lighted Models

Symbol Operating voltage

06 5 VAC/VDC

14 12 VAC/VDC

28 24 VAC/VDC

(6) Color of Pushbutton

Symbol Color

R Red

Y Yellow

G Green

W White

For LED Lamp

(5) (6)

PCB terminals are also avail-

able. Refer to the Switch table

on page 37.

(3) Switch Specifications

Symbol Operation

A Momentary

B Alternate

Standard Load

SPDT

Symbol Operation

E Momentary

F Alternate SPDT

Colored-illumination models

are also available. Refer to

page 36.

Symbol Color

R Red

Y Yellow

G Green

A Blue

W White

For Incandescent Lamp

Non-lighted Models

Symbol Color

R Red

Y Yellow

G Green

W White

A Blue

B Black

For Non-lighted Models

No symbol

A3C A3C

Ordering as a Set

The model numbers used to order sets of Units are given in the following tables. One set comprises the Pushbutton, Lamp (lighted models

only), and Switch.

Rectangular Models

A3CJ

Square Models

A3CA

Round Models

A3CT

Lighted Pushbutton Switches (SPST-NO+SPST-NC Solder Terminals)

Contact type Standard load Microload Pushbutton color

symbol

Operation

Shape Lighting

Momentary

operation

(Self-resetting)

Alternate

operation

(Self-holding)

Momentary

operation

(Self-resetting)

symbol

Rectangular (A3CJ) LED lamp A3CJ-90A1-05EjA3CJ-90B1-05EjA3CJ-90E1-05EjR: red

Y ello

g( )

A3CJ-90A1-12EjA3CJ-90B1-12EjA3CJ-90E1-12EjY: yellow

reen

A3CJ-90A1-24EjA3CJ-90B1-24EjA3CJ-90E1-24Ej

green

W: white

Incandescent lamp A3CJ-90A1-06j--- R: red

Y: yellow

A3CJ-90A1-14jY: yellow

G: green

A3CJ-90A1-28j

green

W: white

A: blue

Non-lighted A3CJ-90A0-jA3CJ-90B0-jA3CJ-90E0-j

B: black (See note 3.)

Square (A3CA) LED lamp A3CA-90A1-05EjA3CA-90B1-05EjA3CA-90E1-05EjR: red

Y ello

q( )

A3CA-90A1-12EjA3CA-90B1-12EjA3CA-90E1-12EjY: yellow

reen

A3CA-90A1-24EjA3CA-90B1-24EjA3CA-90E1-24Ej

green

W: white

Incandescent lamp A3CA-90A1-06j--- R: red

Y: yellow

A3CA-90A1-14jY: yellow

G: green

A3CA-90A1-28j

green

W: white

A: blue

Non-lighted A3CA-90A0-jA3CA-90B0-jA3CA-90E0-j

B: black (See note 3.)

Round (A3CT) LED lamp A3CT-90A1-05EjA3CT-90B1-05EjA3CT-90E1-05EjR: red

Y ello

()

A3CT-90A1-12EjA3CT-90B1-12EjA3CT-90E1-12EjY: yellow

reen

A3CT-90A1-24EjA3CT-90B1-24EjA3CT-90E1-24Ej

green

W: white

Incandescent lamp A3CT-90A1-06j--- R: red

Y: yellow

A3CT-90A1-14jY: yellow

G: green

A3CT-90A1-28j

green

W: white

A: blue

Non-lighted A3CT-90A0-jA3CT-90B0-jA3CT-90E0-j

B: black (See note 3.)

Note: 1. Enter the desired color symbol for the Pushbutton in the j at the end of the model number.

2. There are also alternate-operation models that can be used for microloads. Refer to the Switch table on page 37.

3. Black (“B”) Pushbuttons are only available for non-lighted models.

A3C A3C

Illumination-only and Colored-illumination LED Models

“Illumination only” describes LED models for which the screen color is the same whether the LED is lit or not. The screen simply becomes

brighter when the LED lights.

Example: Red LED

Lit

Not lit

Red

Cap (red)

Legend plate (milky white)

Reflective plunger

LED lamp (red) Lamp

Pushbutton

“Colored illumination” describes LED models for which the screen color is white when the LED is not lit and changes to the color of the LED lamp

when the LED is lit.

Example: Red LED

Lit

Not lit

White

Red

White cap (semi-transparent)

Legend plate (milky white)

Reflective plunger

LED lamp (red)

Pushbutton

Lamp

Ordering: With colored-illumination models, order the Pushbutton, Lamp, and Switch as shown in the following table.

Illuminated color Pushbutton Lamp (LED) Switch

Red IP40

A3Cj-500W A16-jDR Enter one of the

following symbols in j.

5: 5 VDC

Refer to the following

information. Order the

Switch that is

Yellow Enter one of the

following symbols in j.

J: Rectangular

A16-jDY 5: 5 VDC

12: 12 VDC

24: 24 VDC

Switch that is

appropriate for the

Pushbutton.

Green J: Rectangular

A: Square

T: Round A16-jDG

24:

VDC

Pushbutton

A3C A3C

Ordering Individually

Pushbuttons, Lamps, and Switches can be ordered separately. Combinations that are not available as sets can be created using individual

Units. Also, store the parts as spares for maintenance and repairs.

Pushbuttons

LED Lamp

Button color Rectangular Square Round

Red A3CJ-500R A3CA-500R A3CT-500R

Yellow A3CJ-500Y A3CA-500Y A3CT-500Y

Green A3CJ-500GY A3CA-500GY A3CT-500GY

White A3CJ-500W A3CA-500W A3CT-500W

Note: The red, yellow, and white Pushbuttons listed above can be

used with either LED lamp-lighted models or incandescent

lamp-lighted models.

Incandescent Lamp

Button color Rectangular Square Round

Red A3CJ-500R A3CA-500R A3CT-500R

Yellow A3CJ-500Y A3CA-500Y A3CT-500Y

Green A3CJ-500G A3CA-500G A3CT-500G

White A3CJ-500W A3CA-500W A3CT-500W

Blue A3CJ-500A A3CA-500A A3CT-500A

Non-lighted Models

Button color Rectangular Square Round

Red A3CJ-500R A3CA-500R A3CT-500R

Yellow A3CJ-500Y A3CA-500Y A3CT-500Y

Green A3CJ-500G A3CA-500G A3CT-500G

White A3CJ-500W A3CA-500W A3CT-500W

Blue A3CJ-500A A3CA-500A A3CT-500A

Black A3CJ-501B A3CA-501B A3CT-501B

Lamps

LED Lamp

Color Rated voltage

5 VDC 12 VDC 24 VDC

Red A16-5DR A16-12DR A16-24DR

Yellow A16-5DY A16-12DY A16-24DY

Green A16-5DG A16-12DG A16-24DG

White A16-5DW A16-12DW A16-24DW

Incandescent Lamp

Rated voltage 6 VAC/VDC 14 VAC/VDC 28 VAC/VDC

Model A16-5 A16-12 A16-24

Switches

Configuration Contact Switch action Terminal Degree of protection: IP40

Rectangular Square Round

Standard SPST-NO+

SPST NC

Momentary Solder A3CJ-7011 A3CA-7011 A3CT-7011

SPST-NC Alternate A3CJ-7021 A3CA-7021 A3CT-7021

Microload Momentary A3CJ-7111 A3CA-7111 A3CT-7111

Alternate A3CJ-7121 A3CA-7121 A3CT-7121

A3C A3C

Accessories (Order Separately)

Name Appearance Classification Model Remarks

Socket Wire-wrap terminal A3C-4101 Cannot be used with Insulation Cover.

PCB terminal A3C-4102

Solder terminal A3C-4103

Insulation

Cover --- A3C-3002 Cannot be used with Socket.

Switch

Guard For rectangular models A3CJ-5050 Cannot be used with Dust Cover.

For square, round models A3CA-5050

Dust Cover For rectangular models A3CJ-5060 Cannot be used with Switch Guard.

Tightening

Tool --- A3C-3004 The tightening torque is 0.20 to

0.39 N⋅m.

Extractor --- A3PJ-5080 ---

Legend

Plate For rectangular models A3CJ-5201 One Legend Plate is supplied per

standard Switch.

For square models A3CA-5201

For round models A3CT-5201

Specifications

Contact Ratings

Model Item

AC resistive load DC resistive load

Standard load 0.5 A at 250 VAC

1 A at 125 VAC 1 A at 30 VDC

Microload

(See note 1.) 0.1 A at 125 VAC 0.1 A at 30 VDC

Note: 1. The minimum permissible load is 1 mA, 5 VDC.

2. The above ratings are for testing under the following

conditions:

1) Load: Resistive load

2) Mounting conditions: No vibrations or shock

3) Temperature: 20°C ± 2°C

4) Operation frequency: 20 operations/minute

LED Lamp Ratings

Rated

voltage Rated

current Operating

voltage Internal

limiting

resistance

5 VDC 30 mA 5 VDC±5% 33 Ω

12 VDC 15 mA 12 VDC±5% 270 Ω

24 VDC 10 mA 24 VDC±5% 1,600 Ω

Incandescent Lamp Ratings

Rated voltage Rated current Operating voltage

6 VAC/VDC 60 mA 5 VAC/VDC

14 VAC/VDC 40 mA 12 VAC/VDC

28 VAC/VDC 24 mA 24 VAC/VDC

A3C A3C

Characteristics

Operating frequency Mechanical:

Momentary-action models: 120 operations/minute max.

Alternate-action models: 60 operations/minute max. (See note 1.)

Electrical: 20 operations/minute max.

Insulation resistance 100 MΩ min. (at 500 VDC)

Dielectric strength 1,000 VAC, 50/60 Hz for 1 minute between terminals of same polarity and between lamp

terminals (See note 2.)

2,000 VAC, 50/60 Hz for 1 minute between terminals of different polarity and also between

each terminal and ground

Vibration Malfunction: 10 to 55 Hz, 1.5-mm double amplitude (No malfunctions for more than 1 s.)

Shock Destruction: 500 m/s2

Malfunction: 150 m/s2 (No malfunctions for more than 1 s.)

Life expectancy Mechanical:

Momentary-action models: 1,000,000 operations min.

Alternate-action models: 100,000 operations min. (See note 1.)

Electrical: 100,000 operations min.

Weight Approx. 5 g (See note 3.)

Ambient operating temperature –10°C to 55°C (with no icing or condensation)

Ambient operating humidity 35% to 85%

Ambient storage temperature –25°C to 65°C

Degree of protection IP40

Electric shock protection class Class II

PTI (proof tracking index) 175

Pollution degree 3 (IEC947-5-1)

Note: 1. With alternate-operation models, one operation cycle consists of set and reset operations.

2. The figure given above for the dielectric strength between lamp terminals is for when there is no LED lamp or incandescent lamp

mounted.

3. The weight indicated here applies to the lighted models (SPST-NO+SPST-NC).

Operating Characteristics

OF max. 2.45 N

RF min. 0.29 N

TT Approx. 3.5 mm

LTA min.

(See note.) 0.5 mm

PT max. 2.5 mm

Note: The value for L TA min. applies to alternate-operation mod-

els only.

Approved by Standards

UL (File No. E41515)

CSA (File No. LR45258-31)

Rating

Standard

1 A at 125 VAC

0.5 A at 250 VAC

1 A at 30 VDC

Microload

0.1 A at 125 VAC

0.1 A at 30 VDC

Contact Form

Contact name Contact form

SPDT NO

A3C A3C

Nomenclature

Pushbutton

Shape of Pushbutton

Square

(A3CA) Round

(A3CT)

Rectangular

(A3CJ)

Color cap

Legend Plate (milky white)

Reflective

plunger

Color of Pushbutton

•LED lamp-lighted Models:

Red, yellow, green, white

•Incandescent lamp-lighted Models:

Red, yellow, green, white, blue

•Non-lighted Models:

Red, ye l l o w, green, white, blue, black

Lamp

LED Lamp

Incandescent Lamp

Note: The A3CJ model is shown here as a representative example.

Switch

•Standard load:

0.5 A at 250 VAC

1 A at 125 VAC

1 A at 30 VDC

•Microload:

0.1 A at 125 VAC,

0.1 A at 30 VDC

Minimum applicable load: 1 mA at 5 VDC

A3C A3C

Dimensions

The following dimensions apply to the Switch with SPST-NO+SPST-NC contact configuration, with solder terminals.

Rectangular Models

A3CJ Square Models

A3CA

Round Models

A3CT

14 dia.11.8 dia.

A3C A3C

Accessory Mounting Dimensions

Dimensions with Socket Mounted

The diagrams below show the external dimensions for rectangular models as representative models.

Wire-wrap Terminal

A3C-4101 Solder Terminal

A3C-4103

PCB Terminal

A3C-4102

Terminal Hole Dimensions

PCB Cutout (bottom view)

Six, 0.8 dia.

13.9 dia. 13.9 dia.

13.9 dia.

9.7±0.1

7.4±0.1

5.1±0.1

Switch Guard

Rectangular

A3CJ-5050 Square/Round

A3CA-5050

Holder (black)

Guard (transparent)

Holder (black)

Guard (transparent)

Torsion spring

Dust Cover

A3CJ-5060 Insulation Cover

A3C-3002

Legend Plate

Note: 1. The thickness is 0.8 mm.

2. Since the Legend Plate is made of

polycarbonate, use alcohol-based

paints such as melanin, phthalic

acid, or acryl paint when marking the

legend.

Cover B (black)

Cover A (transparent)

Rectangular Square Round

10.1 dia.

13.9 dia.

A3C A3C

Panel Cutout (Top View)

Accessories used Rectangular/A3CJ Square/A3CA, Round/A3CT

Switch only

Note: Recommended panel thickness: 1.0

to 3.2 mm.

12 dia.+0.2

02 dia. (Lock hole)

15 min.

19 min.

12 dia.+0.2

015 min.

Note: Recommended panel thickness: 1.0

to 3.2 mm.

With Switch Guard 12 dia.+0.2

02 dia.

19 min.

22.5 min. 12 dia.+0.2

19 min.

With Dust Cover 12 dia.+0.2

02 dia.

19.5 min.

23.5 min.

---

Note: If the panel is to be finished (e.g., coated), make sure that the panel meets the specified dimensions after the coating.

Operation

Terminal Connections

Terminal Type

SPST-NO+SPST-NC

Solder terminal Lighted and non-lighted models

Terminal hole

(bottom view)

Lamp terminal

t0.3

A3C A3C

Installation

Mounting and Replacing the Pushbutton

Mounting Direction for the Pushbutton/Display and Lamp

Lighted Pushbutton Switch

•Insert the Lamp (incandescent lamp or LED lamp) into the

Pushbutton so that the lamp guide fits into the wider gap

between the projections on the Pushbutton.

Indicator

•With Indicators, the Lamp is inserted facing the opposite

direction (i.e., at 180°) to that for Lighted Pushbutton

Switches.

Groove of the Display

Note: 1. Push the projections on the Lamp into the grooves on

the Pushbutton/Display.

2. The Lamp for Lighted Pushbutton Switches moves, but

the Lamp for Indicators is fixed.

Mounting Direction for the Pushbutton/Display and Switch

Insert the Pushbutton/Display into the Switch so that the lamp guide

is aligned with the non-projecting part of the Switch.

Apply a pressure between 9.8 and 24.5 N.

Projection of the Switch

Note: 1. The mounting direction for Indicators is 180° to that for

Lighted Pushbutton Switches. Be sure to insert the Leg-

end Plate and other parts with the correct orientation.

2. If the terminals of the Lamp become bent, it may be

impossible to fit them into the lamp terminal holes.

Ensure that the terminals are straight when they are

inserted.

3. Take particular care about the mounting direction with

the round models (A3CT).

Removing the Pushbutton/Display

Hold the recessed portions on the cap of the Pushbutton and pull.

Recess

Note: Do not use tools such as pliers to remove the Pushbutton as

this may damage the cap.

Panel Mounting

Insert the Switch from the front of the panel. Mount the mounting nut

from the terminal end of the Switch and tighten it.

There are projections on the terminal end of the Switch which may,

depending o n the orientation, block the nut. In this case, turn the nut

until it is possible to mount it. Tighten the nut to a torque between

0.20 and 0.39 N⋅m.

If soldering is used, mount the mounting nut first. Lead wires and

mounds o f solder may make it impossible to mount the nut after sol-

dering.

Panel Mounting nut

Socket Mounting

After securing the Switch to the panel using the mounting nut, insert

the Socket into the Switch.

Align the positioning holes of the Socket with the projections of the

Switch before inserting the Socket.

Panel

Projection of the Switch

Positioning hole of the

Socket

A3C A3C

Mounting the Insulation Cover

After securing the Switch to the panel using the mounting nut, pass

the lead wires through the holes in the Insulation Cover and then

perform wiring. Hold the Insulation Cover so that the cylindrical hole

is facing the Switch, and insert the lead wires from the end with the

barriers.

After wiring is completed, mount the Insulation Cover by pushing it

into the Switch.

Insulation Cover attached to Switch

Switch terminal

Mounting the Dust Cover

1. The Dust Cover separates into 2 parts: the cap and the

mounting frame.

2. Insert the Switch into the mounting frame. (Align the lock

projection with the recess on the mounting frame.)

3. Insert the Switch in the state described in step 2 into the

panel. (Align the lock protrusion on the mounting frame with

the hole in the panel.)

4. Mount the mounting nut from the back of the panel and tighten

it.

5. Insert the cap into the mounting frame. Ensure that the entire

perimeter of the cap is properly inserted into the mounting

frame by pressing down on the cap from different directions.

Cap (transparent)

Switch Lock protrusions

Mounting frame Mounting nut

Panel

Mounting the Switch Guard

1. Insert the Switch into the Switch Guard.

2. Insert the Switch into the panel in the state described in step

3. Mount the mounting nut from the back of the panel and tighten

it.

Holder (black)

Guard (transparent)

Mounting nut

Panel

A3C A3C

Precautions

Caution

Do not apply a voltage higher than the maximum rated operat-

ing voltage between the lamp terminals, as there is a risk that

the incandescent lamp or LED lamp will be damaged, and the

Pushbutton will be ejected.

When replacing the incandescent lamp, first turn OFF the

power supply, and then wait 10 minutes before performing re-

placement, as the lamp is still hot immediately after the power

is turned OFF, so there is a risk of burns.

Refer to the Common Precautions for Pushbutton Switches on

page 14.

Correct Use

Mounting

To prevent electric shock or a fire, always make sure that the power

is turned OFF before mounting, removing, or wiring the Switch, or

performing maintenance.

Do not tighten the mounting ring excessively using pliers or a similar

tool. Excessive tightening may damage the mounting ring. (T ighten-

ing torque: 0.20 to 0.39 N⋅m)

Wiring

When wiring, use wires of a size appropriate for the applied voltage

and carry current. Perform soldering correctly under the conditions

given below. Using the Switch with the wires soldered incorrectly

may cause the terminals to become abnormally hot and cause a fire.

1. Hand soldering: At 30 W within 5 seconds.

2. Dip soldering: At 240°C within 3 seconds.

Wait for one minute after soldering before exerting any external

force on the solder.

Use a non-corrosive rosin liquid for the flux.

Perform wiring so that the wire sheaths do not come into contact

with the Switch. If this is unavoidable, use wires that can withstand

temperatures of 100°C min.

After wiring to the Switch has been completed, ensure an appropri-

ate insulation distance.

Operating Environment

Do not use in locations that are subject to dust, oil, or metal filings as

these may penetrate the interior of the Switch and cause malfunc-

tion.