CSM_A16_DS_E_11_3
1
Pushbutton Switch (Detachable) (Lighted/Non-Lighted) (Cylindrical 16-dia.)
A16
Separate Construction with
Cylindrical 16-dia. Body
• Miniature design of 28.5 mm, the smallest class in the industry.
• Detachable Switch.
• The same contacts can be used for both standard loads and
microloads.
• Easy-to-wire terminal arrangement.
• Certified for EN 60947-5-1.
List of Models
Button Colors
Refer to Safety Precautions for All Pushbutton Switches/
Indicators and Safety Precautions on page 24.
Model
Rectangular Square Round
Solder
terminals A16@-J Series A16@-A Series A16@-T Series
PCB
terminals A16@-J Series A16@-A Series A16@-T Series
Voltage-reduction
lighting solder
terminals A16@-J Series A16@-A Series A16@-T Series
Screw-less clamp
models
A16@-J Series A16@-A Series A16@-T Series
The button colors when the buttons are lit and when they are not lit are shown below. Use these colors as reference only.
The actual colors may vary.
When not lit
When lit
R
(Red)
Y
(Yellow)
PY
(Pure yellow)
G
(Green)
W
(White)
A
(Blue)
PW
(Pure white)
B
(Black)
A16
2
Model Number Structure
Model Number Legend ..... The model numbers used to order sets of Units are illustrated below. One set comprises the Pushbutton, Lamp
(lighted models only), Case, and Switch. For information on combinations, refer to Ordering Information on
pages 3 to 7.
(1) (2) (3) (4) (5) (6) (7)
A16 5 L - J R M - 24D - 2
(4) Color of Pushbutton
• Color illuminated models are also
available (see page
8
).
• Order the parts separately.
Symbol Color
RRed
YYellow
PY
Pure yellow
G Green
WWhite
ABlue
PW Pure white
B
Black (non-lighted
models only)
(1) Degree of Protection
(2) Lighted/Non-lighted
(3) Shape of Pushbutton
Symbol Protection
No symbol IP40
5Oil-resistant
IP66
Symbol Type
No symbol Non-lighted
L Lighted
Symbol Shape
J
Rectan-
gular
2-way guard
A
Square
2-way guard
T
Round
Projecting
model
(7) Contact Configuration
• Only DPDT contacts are available with Screw-
Less Clamp.
• Consult your OMRON representative
concerning pricing and delivery timing for PCB
terminals and screw-less clamp connectors.
Symbol Type Terminal
1 SPDT Solder Terminal
2DPDT
1P SPDT PCB Terminal
2P DPDT
2S DPDT Screw-less Clamp
(5) Switch Operation
Momentary-operation:
Self-resetting
Alternate-operation:
Self-holding
Colored Illumination
The built-in
LED is colored.
Symbol Operation
M
Momentary
A
Alternate
Unlit Lit
White Color
(6) Light Source
Voltage Reduction Unit (24-V Built-in LED)
• Solder terminals are available only with 100-V models.
• The Voltage Reduction Unit is not available for models with
PCB terminals.
• “T2” is available only for the Screw-less Clamp type.
Symbol Type Operating
voltage Rated
voltage
No symbol Non-lighted
5Incan-
descent
lamp
5 VAC/VDC 6 VAC/VDC
12 12 VAC/VDC 14 VAC/VDC
24 24 VAC/VDC 28 VAC/VDC
5D
LED
5 ± 5% VDC 5 VDC
12D 12 ± 5%
VAC/VDC 12 VAC/VDC
24D 24 ± 5%
VAC/VDC 24 VAC/VDC
Symbol Type Operating
voltage Rated
voltage
T1
LED
100 to 110
VAC/VDC
100/110
VAC/VDC
T2 200 to 220
VAC/VDC
200/220
VAC/VDC
3
A16
Ordering Information
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), Case, and Switch.
Solder Terminal Models
*1. Enter the desired color symbol for the Pushbutton in the @.
*2. Black (“B”) Pushbuttons are only available for non-lighted models.
*1. Enter the desired color symbol for the Pushbutton in the @.
*2. Black (“B”) Pushbuttons are only available for non-lighted models.
Item Momentary operation
(Self-resetting) Alternate operation
(Self-holding) Pushbutton color
symbol *1
Output Lighting Operating
voltage
SPDT
LED without
Voltage
Reduction
Unit
5 VDC A16L-J@M-5D-1 A16L-J@A-5D-1 R: red, Y: yellow
PY: pure yellow
G: green, A: blue
W: white
PW: pure white
12 VAC/VDC A16L-J@M-12D-1 A16L-J@A-12D-1
24 VAC/VDC A16L-J@M-24D-1 A16L-J@A-24D-1
Incandescent
lamp
5 VAC/VDC A16L-J@M-5-1 A16L-J@A-5-1 R: red, Y: yellow
PY: pure yellow
G: green, W: white
A: blue
B: black *2
12 VAC/VDC A16L-J@M-12-1 A16L-J@A-12-1
24 VAC/VDC A16L-J@M-24-1 A16L-J@A-24-1
Non-lighted A16-J@M-1 A16-J@A-1
DPDT
LED without
Voltage
Reduction
Unit
5 VDC A16L-J@M-5D-2 A16L-J@A-5D-2 R: red, Y: yellow
PY: pure yellow
G: green, A: blue
W: white
PW: pure white
12 VAC/VDC A16L-J@M-12D-2 A16L-J@A-12D-2
24 VAC/VDC A16L-J@M-24D-2 A16L-J@A-24D-2
Incandescent
lamp
5 VAC/VDC A16L-J@M-5-2 A16L-J@A-5-2 R: red, Y: yellow
PY: pure yellow
G: green, W: white
A: blue
B: black *2
12 VAC/VDC A16L-J@M-12-2 A16L-J@A-12-2
24 VAC/VDC A16L-J@M-24-2 A16L-J@A-24-2
Non-lighted A16-J@M-2 A16-J@A-2
Item Momentary operation
(Self-resetting) Alternate operation
(Self-holding) Pushbutton color
symbol *1
Output Lighting Operating
voltage
SPDT
LED without
Voltage
Reduction
Unit
5 VDC A165L-J@M-5D-1 A165L-J@A-5D-1 R: red, Y: yellow
PY: pure yellow
G: green, A: blue
W: white
PW: pure white
12 VAC/VDC A165L-J@M-12D-1 A165L-J@A-12D-1
24 VAC/VDC A165L-J@M-24D-1 A165L-J@A-24D-1
Incandescent
lamp
5 VAC/VDC A165L-J@M-5-1 A165L-J@A-5-1 R: red, Y: yellow
PY: pure yellow
G: green, W: white
A: blue
B: black *2
12 VAC/VDC A165L-J@M-12-1 A165L-J@A-12-1
24 VAC/VDC A165L-J@M-24-1 A165L-J@A-24-1
Non-lighted A165-J@M-1 A165-J@A-1
DPDT
LED without
Voltage
Reduction
Unit
5 VDC
A165L-
J@
M-5D-2 A165L-
J@
A-5D-2
R: red, Y: yellow
PY: pure yellow
G: green, A: blue
W: white
PW: pure white
12 VAC/VDC
A165L-
J@
M-12D-2 A165L-
J@
A-12D-2
24 VAC/VDC
A165L-
J@
M-24D-2 A165L-
J@
A-24D-2
Incandescent
lamp
5 VAC/VDC
A165L-
J@
M-5-2 A165L-
J@
A-5-2
R: red, Y: yellow
PY: pure yellow
G: green, W: white
A: blue
B: black *2
12 VAC/VDC
A165L-
J@
M-12-2 A165L-
J@
A-12-2
24 VAC/VDC
A165L-
J@
M-24-2 A165L-
J@
A-24-2
Non-lighted
A165-
J@
M-2 A165-
J@
A-2
A16@-J
Rectangular Models
IP40
Oil-resistant IP66
Individual models: Refer to pages 9 to 13.
(The Pushbutton, Lamp, Case, and Switch can be ordered
separately.)
■ Ratings: Refer to page 16. ■ Characteristics: Refer to page 16.
■ Accessories: Refer to page 15.
A16
4
Ordering Information
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), Case, and Switch.
Solder Terminal Models
*1. Enter the desired color symbol for the Pushbutton in the @.
*2. Black (“B”) Pushbuttons are only available for non-lighted models.
*1. Enter the desired color symbol for the Pushbutton in the @.
*2. Black (“B”) Pushbuttons are only available for non-lighted models.
Item Momentary operation
(Self-resetting) Alternate operation
(Self-holding) Pushbutton color
symbol *1
Output Lighting Operating
voltage
SPDT
LED without
Voltage
Reduction
Unit
5 VDC
A16L-
A@
M-5D-1
A16L-A@A-5D-1 R: red, Y: yellow
PY: pure yellow
G: green, A: blue
W: white
PW: pure white
12 VAC/VDC
A16L-
A@
M-12D-1
A16L-A@A-12D-1
24 VAC/VDC
A16L-
A@
M-24D-1
A16L-A@A-24D-1
Incandescent
lamp
5 VAC/VDC
A16L-
A@
M-5-1
A16L-A@A-5-1 R: red, Y: yellow
PY: pure yellow
G: green, W: white
A: blue
B: black *2
12 VAC/VDC
A16L-
A@
M-12-1
A16L-A@A-12-1
24 VAC/VDC
A16L-
A@
M-24-1
A16L-A@A-24-1
Non-lighted
A16-
A@
M-1
A16-A@A-1
DPDT
LED without
Voltage
Reduction
Unit
5 VDC
A16L-
A@
M-5D-2
A16L-A@A-5D-2 R: red, Y: yellow
PY: pure yellow
G: green, A: blue
W: white
PW: pure white
12 VAC/VDC
A16L-
A@
M-12D-2
A16L-A@A-12D-2
24 VAC/VDC
A16L-
A@
M-24D-2
A16L-A@A-24D-2
Incandescent
lamp
5 VAC/VDC
A16L-
A@
M-5-2
A16L-A@A-5-2 R: red, Y: yellow
PY: pure yellow
G: green, W: white
A: blue
B: black *2
12 VAC/VDC
A16L-
A@
M-12-2
A16L-A@A-12-2
24 VAC/VDC
A16L-
A@
M-24-2
A16L-A@A-24-2
Non-lighted
A16-
A@
M-2
A16-A@A-2
Item Momentary operation
(Self-resetting) Alternate operation
(Self-holding) Pushbutton color
symbol *1
Output Lighting Operating
voltage
SPDT
LED without
Voltage
Reduction
Unit
5 VDC
A165L-A
@
M-5D-1
A165L-
A
@
A-5D-1
R: red, Y: yellow
PY: pure yellow
G: green, A: blue
W: white
PW: pure white
12 VAC/VDC
A165L-A
@
M-12D-1
A165L-
A
@
A-12D-1
24 VAC/VDC
A165L-A
@
M-24D-1
A165L-
A
@
A-24D-1
Incandescent
lamp
5 VAC/VDC
A165L-A
@
M-5-1
A165L-
A
@
A-5-1
R: red, Y: yellow
PY: pure yellow
G: green, W: white
A: blue
B: black *2
12 VAC/VDC
A165L-A
@
M-12-1
A165L-
A
@
A-12-1
24 VAC/VDC
A165L-A
@
M-24-1
A165L-
A
@
A-24-1
Non-lighted
A165-A
@
M-1
A165-
A
@
A-1
DPDT
LED without
Voltage
Reduction
Unit
5 VDC
A165L-A
@
M-5D-2
A165L-
A
@
A-5D-2
R: red, Y: yellow
PY: pure yellow
G: green, A: blue
W: white
PW: pure white
12 VAC/VDC
A165L-A
@
M-12D-2
A165L-
A
@
A-12D-2
24 VAC/VDC
A165L-A
@
M-24D-2
A165L-
A
@
A-24D-2
Incandescent
lamp
5 VAC/VDC
A165L-A
@
M-5-2
A165L-
A
@
A-5-2
R: red, Y: yellow
PY: pure yellow
G: green, W: white
A: blue
B: black *2
12 VAC/VDC
A165L-A
@
M-12-2
A165L-
A
@
A-12-2
24 VAC/VDC
A165L-A
@
M-24-2
A165L-
A
@
A-24-2
Non-lighted
A165-A
@
M-2
A165-
A
@
A-2
A16@-A
Square Models
IP40
Oil-resistant IP66
Individual models: Refer to pages 9 to 13.
(The Pushbutton, Lamp, Case, and Switch can be ordered
separately.)
■ Ratings: Refer to page 16. ■ Characteristics: Refer to page 16.
■ Accessories: Refer to page 15.
5
A16
Ordering Information
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), Case, and Switch.
Solder Terminals
*1. Enter the desired color symbol for the Pushbutton in the @.
*2. Black (“B”) Pushbuttons are only available for non-lighted models.
*1. Enter the desired color symbol for the Pushbutton in the @.
*2. Black (“B”) Pushbuttons are only available for non-lighted models.
Item Momentary operation
(Self-resetting) Alternate operation
(Self-holding) Pushbutton color
symbol *1
Output Lighting Operating
voltage
SPDT
LED without
Voltage
Reduction
Unit
5 VDC A16L-
T
@M-5D-1 A16L-
T
@A-5D-1 R: red, Y: yellow
PY: pure yellow
G: green, A: blue
W: white
PW: pure white
12 VAC/VDC A16L-
T
@M-12D-1 A16L-
T
@A-12D-1
24 VAC/VDC A16L-
T
@M-24D-1 A16L-
T
@A-24D-1
Incandescent
lamp
5 VAC/VDC A16L-
T
@M-5-1 A16L-
T
@A-5-1 R: red, Y: yellow
PY: pure yellow
G: green, W: white
A: blue
B: black *2
12 VAC/VDC A16L-
T
@M-12-1 A16L-
T
@A-12-1
24 VAC/VDC A16L-
T
@M-24-1 A16L-
T
@A-24-1
Non-lighted A16-
T
@M-1 A16-
T
@A-1
DPDT
LED without
Voltage
Reduction
Unit
5 VDC A16L-
T
@M-5D-2 A16L-
T
@A-5D-2 R: red, Y: yellow
PY: pure yellow
G: green, A: blue
W: white
PW: pure white
12 VAC/VDC A16L-
T
@M-12D-2 A16L-
T
@A-12D-2
24 VAC/VDC A16L-
T
@M-24D-2 A16L-
T
@A-24D-2
Incandescent
lamp
5 VAC/VDC A16L-
T
@M-5-2 A16L-
T
@A-5-2 R: red, Y: yellow
PY: pure yellow
G: green, W: white
A: blue
B: black *2
12 VAC/VDC A16L-
T
@M-12-2 A16L-
T
@A-12-2
24 VAC/VDC A16L-
T
@M-24-2 A16L-
T
@A-24-2
Non-lighted A16-
T
@M-2 A16-
T
@A-2
Item Momentary operation
(Self-resetting) Alternate operation
(Self-holding) Pushbutton color
symbol *1
Output Lighting Operating
voltage
SPDT
LED without
Voltage
Reduction
Unit
5 VDC
A165L-
T
@
M-5D-1 A165L-
T
@
A-5D-1
R: red, Y: yellow
PY: pure yellow
G: green, A: blue
W: white
PW: pure white
12 VAC/VDC
A165L-
T
@
M-12D-1 A165L-
T
@
A-12D-1
24 VAC/VDC
A165L-
T
@
M-24D-1 A165L-
T
@
A-24D-1
Incandescent
lamp
5 VAC/VDC
A165L-
T
@
M-5-1 A165L-
T
@
A-5-1
R: red, Y: yellow
PY: pure yellow
G: green, W: white
A: blue
B: black *2
12 VAC/VDC
A165L-
T
@
M-12-1 A165L-
T
@
A-12-1
24 VAC/VDC
A165L-
T
@
M-24-1 A165L-
T
@
A-24-1
Non-lighted
A165-
T
@
M-1 A165-
T
@
A-1
DPDT
LED without
Voltage
Reduction
Unit
5 VDC
A165L-
T
@
M-5D-2 A165L-
T
@
A-5D-2
R: red, Y: yellow
PY: pure yellow
G: green, A: blue
W: white
PW: pure white
12 VAC/VDC
A165L-
T
@
M-12D-2 A165L-
T
@
A-12D-2
24 VAC/VDC
A165L-
T
@
M-24D-2 A165L-
T
@
A-24D-2
Incandescent
lamp
5 VAC/VDC
A165L-
T
@
M-5-2 A165L-
T
@
A-5-2
R: red, Y: yellow
PY: pure yellow
G: green, W: white
A: blue
B: black *2
12 VAC/VDC
A165L-
T
@
M-12-2 A165L-
T
@
A-12-2
24 VAC/VDC
A165L-
T
@
M-24-2 A165L-
T
@
A-24-2
Non-lighted
A165-
T
@
M-2 A165-
T
@
A-2
A16@-T
Round Models
IP40
Oil-resistant IP66
Individual models: Refer to pages 9 to 13.
(The Pushbutton, Lamp, Case, and Switch can be ordered
separately.)
■ Ratings: Refer to page 16. ■ Characteristics: Refer to page 16.
■ Accessories: Refer to page 15.
A16
6
Ordering Information
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), Case, and Switch.
Models with Reduced-voltage Lighting and Solder Terminals
* Enter the desired shape for the Pushbutton in Δ: J (rectangular), A (square), or T (round). Enter the desired color symbol for the Pushbutton in the @.
* Enter the desired shape for the Pushbutton in Δ: J (rectangular), A (square), or T (round). Enter the desired color symbol for the Pushbutton in the @.
Screw-less Clamp Models
*1. Enter the desired shape for the Pushbutton in Δ: J (rectangular), A (square), or T (round). Enter the desired color symbol for the Pushbutton in the @.
*2. Black (“B”) Pushbuttons are only available for non-lighted models.
*1. Enter the desired shape for the Pushbutton in Δ: J (rectangular), A (square), or T (round). Enter the desired color symbol for the Pushbutton in the @.
*2. Black (“B”) Pushbuttons are only available for non-lighted models.
Item Momentary operation
(Self-resetting) Alternate operation
(Self-holding) Pushbutton color
symbol *
Output Lighting Operating voltage
SPDT LED (with built-in
reduced-voltage
lighting function)
100/110 VAC/VDC A16L-Δ@M-T1-1 A16
L
-Δ@A-T1-1 R: red, Y: yellow
PY: pure yellow
G: green, W: white
A: blue
PW: pure white
DPDT 100/110 VAC/VDC A16
L
-Δ@M-T1-2 A16
L
-Δ@A-T1-2
Item Momentary operation
(Self-resetting) Alternate operation
(Self-holding) Pushbutton color
symbol *
Output Lighting Operating voltage
SPDT LED (with built-in
reduced-voltage
lighting function)
100/110 VAC/VDC A165
L
-Δ@M-T1-1 A165
L
-Δ@A-T1-1 R: red, Y: yellow
PY: pure yellow
G: green, W: white
A: blue
PW: pure white
DPDT 100/110 VAC/VDC A165
L
-Δ@M-T1-2 A165
L
-Δ@A-T1-2
Item Momentary operation
(Self-resetting) Alternate operation
(Self-holding) Pushbutton color
symbol *1
Output Lighting Operating voltage
DPDT
LED
5 VDC A16L-Δ@M-5D-2S A16L-Δ@A-5D-2S
R: red, Y: yellow
PY: pure yellow
G: green, W: white
A: blue
PW: pure white
B: black *2
12 VAC/VDC A16L-Δ@M-12D-2S A16L-Δ@A-12D-2S
24 VAC/VDC A16L-Δ@M-24D-2S A16L-Δ@A-24D-2S
LED (with built-in
reduced-voltage
lighting function)
100/110 VAC/VDC A16L-Δ@M-T1-2S A16L-Δ@A-T1-2S
200/220 VAC/VDC A16L-Δ@M-T2-2S A16L-Δ@A-T2-2S
Non-lighted A16-Δ@M-2S A16-Δ@A-2S
Item Momentary operation
(Self-resetting) Alternate operation
(Self-holding) Pushbutton color
symbol *1
Output Lighting Operating voltage
DPDT
LED
5 VDC
A165L
-Δ@
M-5D-2S A165L
-Δ@
A-5D-2S
R: red, Y: yellow
PY: pure yellow
G: green, W: white
A: blue
PW: pure white
B: black *2
12 VAC/VDC
A165L
-Δ@
M-12D-2S A165L
-Δ@
A-12D-2S
24 VAC/VDC
A165L
-Δ@
M-24D-2S A165L
-Δ@
A-24D-2S
LED (with built-in
reduced-voltage
lighting function)
100/110 VAC/VDC
A165L
-Δ@
M-T1-2S A165L
-Δ@
A-T1-2S
200/220 VAC/VDC
A165L
-Δ@
M-T2-2S A165L
-Δ@
A-T2-2S
Non-lighted
A165
-Δ@
M-2S A165
-Δ@
A-2S
A16@-T1
IP40 Note: Models with voltage ratings of 200 to 220 VAC/DC (T2 models) are listed with models with screw-less clamp
Oil-resistant IP66
IP40
A16@-2S
Oil-resistant IP66
7
A16
Ordering Information
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), Case, and Switch.
Models with PCB Terminals
Note: Contact your OMRON representative about Selector Switches and Key Selector Switches.
*1. Enter the desired shape for the Pushbutton in Δ: J (rectangular), A (square), or T (round). Enter the desired color symbol for the Pushbutton in the @.
*2. Black (“B”) Pushbuttons are only available for non-lighted models.
Note: Contact your OMRON representative about Selector Switches and Key Selector Switches.
*1. Enter the desired shape for the Pushbutton in Δ: J (rectangular), A (square), or T (round). Enter the desired color symbol for the Pushbutton in the @.
*2. Black (“B”) Pushbuttons are only available for non-lighted models.
Item Momentary operation
(Self-resetting) Pushbutton color
symbol *1
Output Lighting Operating voltage
SPDT
LED
5 VDC A16L-Δ@M-5D-1P
R: red
Y: yellow
PY: pure yellow
G: green
A: blue
W: white
B: black *2
12 VAC/VDC A16L-Δ@M-12D-1P
24 VAC/VDC A16L-Δ@M-24D-1P
Non-lighted A16-Δ@M-1P
DPDT
LED
5 VDC A16L-Δ@M-5D-2P
12 VAC/VDC A16L-Δ@M-12D-2P
24 VAC/VDC A16L-Δ@M-24D-2P
Non-lighted A16-Δ@M-2P
Item Momentary operation
(Self-resetting) Pushbutton color
symbol *1
Output Lighting Operating voltage
SPDT
LED
5 VDC A165L-Δ@M-5D-1P
R: red
Y: yellow
PY: pure yellow
G: green
A: blue
W: white
B: black *2
12 VAC/VDC A165L-Δ@M-12D-1P
24 VAC/VDC A165L-Δ@M-24D-1P
Non-lighted A165-Δ@M-1P
DPDT
LED
5 VDC A165L-Δ@M-5D-2P
12 VAC/VDC A165L-Δ@M-12D-2P
24 VAC/VDC A165L-Δ@M-24D-2P
Non-lighted A165-Δ@M-2P
IP40
A16@-P
IP66
A16
8
Ordering Information
Illumination Only and Colored Illumination for Models with LEDs
With illumination only, the color of the lighted surface is the same when the LED is lit and when it is not lit.
Example: Red Illumination
With colored illumination, the color of the lighted surface is white when the LED is not lit and the LED emits another color when it is lit.
Example: Red Illumination
Ordering: For colored illumination, order the Pushbutton, Case, Lamp, and Switch separately.
Color emitted
when lit Operation Unit Case Lamp (LED) Switch
Red IP40
A16L-@W
IP66
A165L-@W
Insert one of the fol-
lowing symbols into
the box (@).
J: Rectangular
A: Square
T: Round
IP40
• Momentary: A16-C@M
• Alternate: A16-C@A
IP66
• Momentary: A165-C@M
• Alternate: A165-C@A
Insert one of the following symbols
into the box (@).
J: Rectangular (2-way guard)
A: Square (2-way guard)
T: Round (projected)
A16-@DSR
Specify one of the fol-
lowing symbols in the
box (@).
5: 5 VDC
12: 12 VAC/VDC
24: 24 VAC/VDC
Refer to page 14. Any
Switch can be mount-
ed.
Yellow A16-@DSY
Green A16-@DSG
Blue A16-@DA
Cap (red)
Not lit
Red Legend plate
Dispersion plate (milky white)
Reflective plunger
LED lamp (red) Lamp
Operation Unit
Lit
Red
Cap (translucent)
Not lit
White Legend plate
Dispersion plate (milky white)
Reflection plunger
LED lamp (red) Lamp
Operation Unit
Lit
Red
9
A16
Ordering Information
Ordering Individually......... Pushbuttons, Lamps, Cases, 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
Case
Switch
Square Models Round ModelsRectangular Models
Note: Use IP40 Operation Units with IP40 Case
and use IP66 Operation Units with IP66
Case. There is no Legend Plate built into
the Operation Unit.
A Legend Plate is built into the Operation
Unit. However, if the Operation Unit is
black (non-lighted models only), a Legend
Plate is not built in.
Note: Operation Unit Sets that combine an Operation Unit and a Case are also
available. (Refer to page 10.)
Lighted Models
Lamp
LED Incandescent lamp
Non-lighted Models
Solder terminals
(no transformer)
Lighted/non-lighted
Note: Switch Units that combine a Lamp and a Switch are also
available. (Refer to page 11.)
Ordering set combinations: Refer to pages 3 to 7. ■ Specifications: Refer to page 16.
■ Accessories, Replacement, and Tools: Refer to page 15.
A16
10
Ordering Information
Units................................ Select a Pushbutton Unit (Pushbutton and Case) and a Switch Unit (Lamp and Switch).
Unit Sets....................... Sets that combine an Operation Unit and a Case.
Operation Unit
Insert one of the following symbols into the box (@).
* Use this pushbutton color if the illumination color of the LED is white or pure white.
Operation Unit
Switch Unit with Voltage-reduction Lighting Switch Unit with Screw-less Clamp Connectors
Appearance Classification Model
IP40
Momentary
operation
Rectangular (2-way guard) A16-J@M
Square (2-way guard) A16-A@M
Round (projected) A16-T@M
Alternate operation
Rectangular (2-way guard) A16-J@A
Square (2-way guard) A16-A@A
Round (projected) A16-T@A
Oil-resistant IP66
Momentary
operation
Rectangular (2-way guard) A165-J@M
Square (2-way guard) A165-A@M
Round (projected) A165-T@M
Alternate operation
Rectangular (2-way guard) A165-J@A
Square (2-way guard) A165-A@A
Round (projected) A165-T@A
Symbol Color Remarks
RRed
LED indicator, incandescent
lamp, or non-lighted
YYellow
PY Pure yellow
ABlue
WWhite*
GY Green LED only
G Green Incandescent lamp or non-lighted
B Black Non-lighted only
Rectangular, square, round
Lighted Models Lighted/Non-lighted Model
Voltage-reduction
lighting
Lamp
Note: An LED rated 24 VAC/VDC is built-in.
Lighted/Non-lighted
Lamp
Note: Non-lighted models do not include a Lamp.
11
A16
Ordering Information
Unit Sets....................... Sets that combine a Switch and a Lamp.
Switch Units with Incandescent Lamps
Switch Units with LED Lamps
Switch Units with Voltage-reduction Lighting (Soldered Terminals)
Note: An LED rated 24 VAC/VDC is built-in.
Switch Units with Screw-less Clamp Connectors
Note: The 100-V models and 200-V models an LED rated 24 VAC/VDC is built-in.
Insert symbols in Δ and @.
Δ@
Note: If the Pushbutton is pure yellow (PY), use white (W) for the Switch Unit.
Appearance Classification Model
Standard loads and
microloads Solder terminals
SPDT A16L-@-1
DPDT A16L-@-2
Appearance Classification Model
Standard loads and
microloads
Solder terminals SPDT A16L-Δ-@-1
DPDT A16L-Δ-@-2
PCB terminals SPDT A16L-Δ-@-1P
DPDT A16L-Δ-@-2P
Appearance Classification Operating voltage Model
Standard loads and microloads
SPDT 100/110 VAC/VDC A16L- Δ-T1-1
DPDT 100/110 VAC/VDC A16L-Δ-T1-2
Appearance Classification Model
Standard loads and
microloads DPDT
Non-lighted A16-2S
Lighted
No voltage-reduction lighting A16L-Δ-@-2S
Voltage-reduc-
tion lighting
Note.
100/110 VAC/VDC A16L-Δ-T1-2S
200/220 VAC/VDC A16L-Δ-T2-2S
Symbol Color Symbol Type Operating
voltage
RRed 5
Incandescent
5 VAC/VDC
Y Yellow 12 12 VAC/VDC
G Green 24 24 VAC/VDC
W White 5D
LED
5 VDC
A Blue 12D 12 VAC/VDC
24D 24 VAC/VDC
A16
12
Ordering Information
Ordering Individually......... Pushbuttons, Lamps, Cases, 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
* Use this pushbutton color if the illumination color of the LED is white or pure white.
Incandescent Lamps (With the exception of green, the Units are the same as for LEDs.)
Non-lighted (Same as Units for incandescent lamps.)
Degree of protection IP40 Oil-resistant IP66
Color
Rectangular Square Round Rectangular Square Round
Red A16L-JR A16L-AR A16L-TR A165L-JR A165L-AR A165L-TR
Yellow A16L-JY A16L-AY A16L-TY A165L-JY A165L-AY A165L-TY
Pure yellow A16L-JPY A16L-APY A16L-TPY A165L-JPY
A165L-APY A165L-TPY
Green A16L-JGY A16L-AGY A16L-TGY
A165L-JGY A165L-AGY A165L-TGY
White* A16L-JW A16L-AW A16L-TW A165L-JW A165L-AW A165L-TW
Blue A16L-JA A16L-AA A16L-TA A165L-JA A165L-AA A165L-TA
Degree of protection IP40 Oil-resistant IP66
Color
Rectangular Square Round Rectangular Square Round
Red A16L-JR A16L-AR A16L-TR A165L-JR A165L-AR A165L-TR
Yellow A16L-JY A16L-AY A16L-TY A165L-JY A165L-AY A165L-TY
Pure yellow A16L-JPY A16L-APY A16L-TPY A165L-JPY
A165L-APY A165L-TPY
Green A16L-JG A16L-AG A16L-TG
A165L-JG A165L-AG A165L-TG
White A16L-JW A16L-AW A16L-TW A165L-JW A165L-AW A165L-TW
Blue A16L-JA A16L-AA A16L-TA A165L-JA A165L-AA A165L-TA
Degree of protection IP40 Oil-resistant IP66
Color
Rectangular Square Round Rectangular Square Round
Red A16L-JR A16L-AR A16L-TR A165L-JR A165L-AR A165L-TR
Yellow A16L-JY A16L-AY A16L-TY A165L-JY A165L-AY A165L-TY
Pure yellow A16L-JPY A16L-APY A16L-TPY A165L-JPY
A165L-APY A165L-TPY
Green A16L-JG A16L-AG A16L-TG
A165L-JG A165L-AG A165L-TG
White A16L-JW A16L-AW A16L-TW A165L-JW A165L-AW A165L-TW
Blue A16L-JA A16L-AA A16L-TA A165L-JA A165L-AA A165L-TA
Black A16L-JB A16L-AB A16L-TB A165L-JB A165L-AB A165L-TB
Ordering set combinations: Refer to pages 3 to 7. ■ Specifications: Refer to page 16
.
■ Accessories, Replacement, and Tools: Refer to page 15.
13
A16
Ordering Information
Ordering Individually......... Pushbuttons, Lamps, Cases, 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.
Lamps
LED
Note: 1. If an LED lamp with normal brightness is needed, select a Lamp used in the A3C.
2. For voltage-reduction lighting use the A16-24D@. Only 24 VAC/VDC LED lamps can be used.
* Use the white LED together with white or pure yellow Pushbuttons.
Incandescent Lamp
Cases
Operating voltage
Light color
High brightness
5 VDC 12 VAC/VDC 24 VAC/VDC
Red A16-5DSR A16-12DSR A16-24DSR
Yellow A16-5DSY A16-12DSY A16-24DSY
Green A16-5DSG A16-12DSG A16-24DSG
White * A16-5DSW A16-12DSW A16-24DSW
Blue A16-5DA A16-12DA A16-24DA
Pure white A16-5DPW A16-12DPW A16-24DPW
Appearance Operating voltage Model
5 VAC/VDC A16-5
12 VAC/VDC A16-12
24 VAC/VDC A16-24
Appearance Classification Model
IP40
Momentary operation
Rectangular (2-way guard) A16-CJM
Square (2-way guard) A16-CAM
Round (projected) A16-CTM
Alternate operation
Rectangular (2-way guard) A16-CJA
Square (2-way guard) A16-CAA
Round (projected) A16-CTA
Oil-resistant IP66
Momentary operation
Rectangular (2-way guard) A165-CJM
Square (2-way guard) A165-CAM
Round (projected) A165-CTM
Alternate operation
Rectangular (2-way guard) A165-CJA
Square (2-way guard) A165-CAA
Round (projected) A165-CTA
Ordering set combinations: Refer to pages 3 to 7. ■ Specifications: Refer to page 16
.
■ Accessories, Replacement, and Tools: Refer to page 15.
A16
14
Ordering Information
Switches
Switches with Reduced-voltage Lighting
Note: For a Switch with Reduced-voltage Lighting, use the A16-24D@.
Appearance Classification Model
Solder terminal
Lighted/non-lighted (common use) Standard load/microload
(common use)
SPDT A16-1
DPDT A16-2
PCB terminal
SPDT A16-1P
DPDT A16-2P
Screw-less Clamp
DPDT A16-2S
Appearance Classification Model
Solder terminal
100 V
Standard load/microload
(common use)
SPDT A16-T1-1
DPDT A16-T1-2
Screw-less Clamp
100 V
DPDT
A16-T1-2S
200 V A16-T2-2S
15
A16
Ordering Information
Accessories, Replacements, and Tools
Accessories
Replacements
Tools
Name Appearance Classification Model Remarks
Switch Guards
For rectangular models A16ZJ-5050
Cannot be used with the Dust Cover.
For square and round
models A16ZA-5050
Dust Covers
For rectangular models A16ZJ-5060
Cannot be used with the Switch Guard.
Can be operated with the Dust Cover attached.
For square models A16ZA-5060
For round models A16ZT-5060
Panel Plugs
For rectangular models A16ZJ-3003 Used for covering the panel cutouts for future panel
expansion.
Protective structure: IP40
Color: Black
For square models A16ZA-3003
For round models A16ZT-3003
Name Appearance Classification Model Remarks
Legend Plates
Rectangu-
lar
Oil-resistant
IP66 Milky A16ZJ-5204 • A Legend Plate is provided as a
standard feature with the Opera-
tion Unit. However, if the Opera-
tion Unit is black (non-lighted
models only), a Legend Plate is
not provided.
Square Oil-resistant
IP66 Milky A16ZA-5204
Round Oil-resistant
IP66 Milky A16ZT-5204
Color Caps (for
IP40)
Rectangular
Square
Round
LED lamp/incandescent
lamp/nonlighted
White A16Z@-5001W
• Insert one of the following letters
into the box (@).
J: Rectangular
A: Square
T: Round
• The Color Cap is usually supplied.
Replace the Cap if the color is to
be changed.
• When using an LED indicator, be
sure to use a Color Cap that
matches the luminescent color of
the LED.
• The materials used for the IP40
and oil-resistant IP66 are different
so be sure to use a Color Cap that
matches the specifications of the
Switch.
Red A16Z@-5001R
Yellow A16Z@-5001Y
Pure yellow A16Z@-5001PY
Blue A16Z@-5001A
LED lamp Green A16Z@-5001GY
Incandescent lamp/non-lighted
Green A16Z@-5001G
Non-lighted Black A16Z@-5011B
Color Caps (for
oil-resistant IP66)
LED lamp/incandescent
lamp/nonlighted
White A16Z@-5101W
Red A16Z@-5101R
Yellow A16Z@-5101Y
Pure yellow A16Z@-5101PY
Blue A16Z@-5101A
LED lamp Green A16Z@-5101GY
Incandescent lamp/non-lighted
Green A16Z@-5101G
Non-lighted Black A16Z@-5111B
Name Appearance Model
Applicable types
Remarks
Pushbut-
ton Switch
Knob-type
Selector
Switch
Key-type
Selector
Switch
Emergen-
cy Stop
Switch Indicator
Operation Unit
Extractor A3PJ-5080 ●———●
Convenient for ex-
tracting Pushbutton
Switches
Screw Fitting A16Z-3004 ●●●●●
Convenient for
ganged installation.
Socket Unit Lamp
Extractor A16Z-5080 ●●●●●
Convenient for ex-
tracting the Switch
and Lamps.
A16
16
Specifications
Approved Standard Ratings
Ratings
Switch Ratings
Minimum applicable load: 1 mA at 5 VDC
Rated values are obtained from tests conducted under the following
conditions.
1. Load: Resistive load
2. Mounting conditions: No vibration and no shock
3. Temperature: 20 ±2°C
4. Operating frequency: 20 operations/min
Contact Form
Super-bright LED
Incandescent Lamp
Voltage-reduction Unit (LED Lamp)
Characteristics
Socket Unit
*1. Set and reset constitute one operation.
*2. With LED and incandescent lamp not mounted.
*3. Degree of protection from the front of the panel.
Screw-less Clamp
Operating Characteristics
* Alternate operation models only.
UL, cUL (File No. E41515) TÜV (EN60947-5-1) (Low Voltage Directive) CCC (GB14048.5)
5 A at 125 VAC, 3 A at 250 VAC (general use)
3 A at 30 VDC (resistive)
Note: Certification has been obtained for the Switch.
For detailed information on individual products that
have received certification, consult your supplier.
3 A at 250 VAC
3 A at 30 VDC
5 A at 125 VAC
3 A at 250 VAC
3 A at 30 VDC
Rated voltage Resistive load
125 VAC 5 A
250 VAC 3 A
30 VDC 3 A
Name Contact
DPDT
COM
NC
NO
Rated
voltage Rated
current Operating
voltage Internal limiting resistor
5 VDC
8 mA
5 VDC ±5% Red, yellow, white: 300 Ω
Green, blue, pure white: 160 Ω
12 VAC/VDC 12 VAC/VDC ±5% Red, yellow, white: 1 kΩ
Green, blue, pure white: 910 Ω
24 VAC/VDC 24 VAC/VDC ±5% 2.4 kΩ
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
Rated voltage Operating voltage Applicable lamp
110 VAC/VDC 100/110 VAC/VDC
(90 to 121 V) A16-24DS@
LED Lamp
220 VAC/VDC 200/220 VAC/VDC
(180 to 242 V)
Item Type Pushbutton Switch
Allowable
operating
frequency
Mechanical
Momentary operation: 120 operations/minute max.
Alternate operation: 60 operations/minute max. *1
Electrical 20 operations/minute max. *1
Insulation resistance 100 MΩ min. (at 500V DC)
Contact resistance 100 mΩ max. (initial value)
Dielectric
strength
Between terminals
of same polarity 1,000 VAC, 50/60 Hz for 1 minute
Between terminals
of different polarity
2,000 VAC, 50/60 Hz for 1 minute
Between each ter-
minal and ground 2,000 VAC, 50/60 Hz for 1 minute
Between lamp ter-
minals 1,000 VAC, 50/60 Hz for 1 minute *2
Vibration
resistance Malfunction 10 to 55 Hz, 1.5-mm double amplitude
(malfunction within 1 ms)
Shock
resistance
Destruction 500 m/s2 max.
Malfunction 150 m/s2 max. (malfunction within 1 ms)
Durability Mechanical
Momentary operation: 2,000,000 operations min.
Alternate operation: 200,000 operations min. *1
Electrical 100,000 operations min. *1
Electric shock protection class Class II
PTI (tracking characteristic) 175
Degree of contamination 3 (IEC947-5-1)
Weight Approx. 10 g (in the case of a lighted
DPDT switch with solder terminals)
Degree of protection IP40: A16, Oil-resistant IP66: A165 *3
Ambient operating temperature
–10
°
C to 55
°
C (with no icing or condensation)
Ambient operating humidity 35% to 85%RH
Ambient storage temperature
–25
°
C to 65
°
C (with no icing or condensation)
Item Screw-Less Clamp
Recommended wire size 0.5 mm2 twisted wire or 0.8 mm-dia. solid wire
Usable wires
and tensile
strength
Twisted
wire 0.3 mm20.5 mm20.75 mm21.25 mm2
Solid
wire 0.5 mm
dia.
0.8 mm
dia.
1.0 mm
dia. —
Tensile
strength 10 N 20 N 30 N 40 N
Length of exposed wire 10 ±1mm
Compliant standards JIS C 2811 Terminal Blocks for Industrial Use
Type Pushbutton Switch
Characteristics IP40 Oil-resistant IP66
Operating force (OF) max. 4.41 N 4.91 N
Releasing force (RF) min. 0.29 N
Total travel (TT) Approx. 3 mm
Pretravel (PT) max. 2.5 mm
Lock travel alternate (LTA) min.
*0.5 mm
17
A16
Nomenclature
Model Structure
Cap
●Terminal Type
Solder terminals
(tab terminals #110)
PCB terminals
Screw-less Clamp
●Degree of Protection
IP40/Oil-resistant IP66
●Color of Pushbutton
· LED/incandescent models
Red, Green, Yellow, White, Blue
· Neon models
Red, Green, White
· Non-lighted models
Red, Green, Yellow, White, Blue, Black
Legend plate
Dispersion plate
Reflective plunger
Lamp
Square (A16@-A)
Round (A16@-T)
Rectangular (A16@-J)
●Flange Shape
●Switch Specifications
5 A at 125 VAC
3 A at 250 VAC
3 A at 30 VDC
Minimum applicable load: 1 mA at 5 VDC
Pushbutton
Switch
A16
18
Dimensions • The Dimension shows 2-switch outputs. • The lamp terminal is also provided with non-lighted models. (Unit: mm)
12.2
2.8
1815.1
21
24
Packing (t0.5)
(for oil-resistant IP66 only)
Mounting nut
4.85
Lamp terminal
15.812.4
M16´1
Lock ring
4
10.8
28.5
21.1
9.5
6
18
Lamp terminal
24 min.
19 min.
16 dia.
+0.2
0
Rectangular
A16@-J
Solder terminals (tab terminals #110)
•See page 21 for panel cutouts
12.2
2.8
Packing (t0.5)
(for oil-resistant IP66 only)
Mounting nut
4.85
Lamp terminals
15.812.4
M16´1
4
10.8
28.5
21.1
9.5
6
18
Lamp terminals
Lock ring
1815.1
15.1
18
19 min.
16 dia.
+0.2
0
19 min.
Square
A16@-A
Solder terminals (tab terminals #110)
•See page 21 for panel cutouts
12.2
2.8
18
18Packing (t0.5)
(for oil-resistant IP66 only)
15.8
Lamp terminals
15.1 dia.
18 dia.
Mounting nut
Lock ring
M16´1
Lamp terminals
18
4
10.8
28.5
21.1
9.5
6
12.4
4.85
19 min.
16 dia.
+0.2
0
19 min.
Round
A16@-T
Solder terminals (tab terminals #110)
•See page 21 for panel cutouts
19
A16
Dimensions
•
The Dimension shows 2-switch outputs.
•
The lamp terminal is also provided with non-lighted models.
•
A rectangular model is listed as an example.
(Unit: mm)
1815.1
21
24
0.5
0.5
4.8518.6
18.4 20.4
6.3
2.5
12.4
4
23.1
28.3
26.4
21.1
10.8
9.5
6
Lock ring
Mounting nut
Packing (t0.5)
(for oil-resistant IP66 only)
M16´1
24 min.
24 min.
16 dia.
+0.2
0
14.7 ± 0.05 dia.
9.1 ± 0.05
5.1 ± 0.05
Rectangular
A16@-J@-@P
PCB terminals
•See page 21 for panel cutouts
9.5 21.1
28.5
Marking face
189.8
0.5
0.5
0.5 Direction-indication arrow
M16´1
12.2
42.7
50.1
(22.4)
24
18
21
15.1
20.6
10.86
4
16.68.8
12.42.8
Switch
Mounting nut
2.8
Packing (t0.5)
(for oil-resistant IP66 only)
Lock ring
24 min.
Panel Cutouts
23 min.
16 dia.
+0.2
0
Rectangular
A16@-J@-T1
Voltage-reduction lighting, solder terminals
(tab terminals #110)
Mounting nut
Switch dismounting lever
Packing (t0.5)
(for oil-resistant IP66 only)
27.4(31.7) 23.5
23.9
2
24
9.5
6
48.9
21
15.1
24
18
M16´1
4
10.8
Lock ring
25 min.
Panel Cutouts
33 min.
16 dia.
+0.2
0
Rectangular
A16@-J@-2S, T1-2S, T2-2S
Screw-less Clamp
12 max. 4Cathode (-)
Anode (+)
*
2.8
0.25
6 dia.
Lamps
LED
A16-5D@/-12D@/-24D@
Incandescent Lamp
A16-5/-12/-24
2.54
12 max. 4
6 dia.
0.5 dia.
* The voltage display surface is the same color as the illumination
color. The opposite surface is light gray.
(For pure white, the entire surface is light gray.)
A16
20
Dimensions (Unit: mm)
Accessories, Tools, and Components
Panel Plugs (Black Resin)
Select the Plug that fits the panel design and
mount from the front of the Panel. Panel cutouts
are the same as those for Switches.
Protective structure: IP40
Color: Black
20
15 5 10
25
50
Extractor
A3PJ-5080
18.9
12.9
0.6
0.6
12.9
12.9
0.6
13.4 dia.
12.9 dia.
Legend Plates
A16ZJ-520@A16ZA-520@A16ZT-520@
18 dia.
60
2
Screw Fitting
A16Z-3004
Note: 1. The panel is 0.6 mm thick.
2. The panel is made of the materials listed in the following
table.
Color Degree of
protection Materials
Milky IP40 Polyalylate resin
IP66
Transparent IP40 Polycarbonate resin
IP66 Polyalylate resin
Rectangular Square Round
24
18
A16ZJ-3003
18
18
A16ZA-3003
18 dia.
A16ZT-3003
15 dia.
0
-0.1
Rough surface
Rough surface
17.9 ± 0.1
17.9 ± 0.1
15.8 ± 0.1 dia.
@12
2+0.2
0
t=1
Lock Ring
8
20
2
80
10
12
Socket Unit Lamp Extractor
A16Z-5080
21
A16
Dimensions (Unit: mm)
Panel Cutouts
Solder Terminals and Screw-less Clamp Connectors PCB Terminals
Terminal Arrangement
Models without Reduced-voltage Lighting (Non-lighted Pushbutton Switches are also provided with lamp terminals.)
Solder Terminals
Rectangular A16
@
-
@
J/M16
@
-
@
J
Square A16@-A/M16@-A
Round A16@-T/M16@-T Rectangular A16@-J/M16@-J Square A16@-A/M16@-A
Round A16@-T/M16@-T
(Top View) (Top View) (Top View) (Top View)
Note:• Make sure the thickness of the mounting panel is between 0.5 and 3.2
mm. If, however, a Switch Guard or Dust Cover is used, the thickness
of the mounting panel must be between 0.5 and 2 mm.
• If the panel is to be finished with coating, etc., make sure that the panel
meets the specified dimensions after coating.
• Figures in parentheses are for Screw-less Clamp Connectors.
Note:• Ensure that the variation in the distance between the centers of
neighboring mounting holes is less than ±0.1 mm.
• Make sure the thickness of the mounting panel is between 0.5 and 3.2
mm. If, however, a Switch Guard or Dust Cover is used, the thickness
of the mounting panel must be between 0.5 and 2 mm.
• If the panel is to be finished with coating, etc., make sure that the panel
meets the specified dimensions after coating.
Lighted SPDT Switches Lighted DPDT Switches
24 min.
(25 min.)
19 min.
(33 min.)
16 dia.
+0.2
0
19 min.
(33 min.)
19 min.
(25 min.)
16 dia.
+0.2
0
9.1 ± 0.05
5.1 ± 0.05
14.7 ± 0.05 dia. 24 min.
24 min.
16 dia.
+0.2
0
16 dia.
+0.2
0
19 min.
(33 min.)
19 min.
(25 min.)
Terminal Arrangement
(Bottom View)
Dimensions of
Terminal Holes
Note: The L+ is not shown on the Switch.
2.6
0.9
1.5
2.8Lamp terminal
12.2
18
7.4
NCL-
NO
COM
SW1
2.6
0.9
1.5
2.8
12.2
18
7.4
NC
NO
COM
NCL-
NO
COM
SW2SW1
Terminal Arrangement
(Bottom View)
Dimensions of
Terminal Holes
Note: The L+ is not shown on the Switch.
Lamp terminal
A16
22
Dimensions (Unit: mm)
PCB Terminals (Lamp terminals are also present on non-lighted models.)
Terminal Arrangement
Voltage-reduction Lighting (Lamp terminals are also present on non-lighted models.)
Solder Terminals Screw-Less Clamps
Lighted SPDT Switches Lighted DPDT Switches
DPDT lighted models DPDT lighted models
•The voltage-reduction circuit is built in. •Voltage-reduction lighting models with Screw-Less Clamps (A16L-@T1-2S, A16L-@T2-2S)
incorporate voltage-reduction circuits.
Model, rating, and lot
number indication
Terminal Arrangement
(Bottom View)
Dimensions of
PCB Terminals
4.85
18.6
Lamp terminal (t=0.5)
1.5
3.5
5.3
2.7
0.8
12.4
Side with TOP indicated
NC L-
NO
COM
SW 1
Side with TOP indicated A ± 0.1
L ± 0.1
Two, 5 dia.
Five, 1 dia.
20 ± 0.1 4.85 ± 0.05
6.3 ± 0.05
PCB Cutouts
(Bottom View)
A = 24 min.: Rectangular
A = 21 min.: Square or round
L = 24 min.
Use a PCB with a thickness of 1.6 mm.
12.4 ± 0.05
Note: Secure the panel to the board using stud bolts
if force will be applied to the board after wiring.
1.5
3.5
5.3
2.7
0.8
4.85
18.6
12.4
Lamp terminal (t=0.5)
Terminal Arrangement
(Bottom View)
Dimensions of
PCB Terminals
Side with TOP indicated
NC
NO
COM
NC L-
NO
COM
SW 2SW 1
Eight, 1 d
Two, 5 dia.
A ± 0.1
L ± 0.1
6.3 ± 0.056.3 ± 0.05
12.4 ± 0.05
Side with TOP indicated
PCB Cutouts
(Bottom View)
4.85 ± 0.05
20 ± 0.1
A = 24 min.: Rectangular
A = 21 min.: Square or round
L = 24 min.
Use a PCB with a thickness of 1.6 mm.
Note: Secure the panel to the board using stud bolts
if force will be applied to the board after wiring.
Side with direction arrow
(Bottom view)
NCNC
NONO
SW1 SW2
CC
L
L
Red (Release button)
White (Release button)
Black (Release button)
Black (Release button)
Red (Release button)
White (Release button)
Black (Release button)
Black (Release button)
Red (Release button)
Black (Release button)
NC1
NO1
C1
C1
NC2
Side indicating TOP
NO2
C2
-
+
C2 +
12-3.1 dia. (Insertion hole) SW1 SW2
23
A16
Dimensions (Unit: mm)
Accessory Dimensions Mounted
Dimensions with Switch Guard Installed
Dust Covers
24
10.5
23.5
Torsion spring
24.5 min.
Panel Cutout (Top View)
X
28 min.
16+0.2 dia.
0
Guard (transparent)
Holder (black)
19.6
27
18.1
13
Rectangular
A16ZJ-5050
Note: This example is for when X is
4.5 mm.
If X is not required, the
Switches can be mounted with
a minimum vertical installation
pitch of 24 mm min.
18
10.5
23.5
Torsion spring
X
19 min.
Panel Cutout (Top View)
28 min.
16+0.2 dia.
0
19.6
27
18.1
13
Guard (transparent)
Holder (black)
Square
A16ZA-5050
Note:
This example is for when X is 4.5
mm.
If X is not required, the Switches
can be mounted with a minimum
vertical installation pitch of 24 mm
min.
If PCB terminals are used, provide X
must be 24 mm or larger.
24
30
Cover B (transparent)
Cover A (black)
19.6
2713.8
16 dia.
+0.2
0
31 min.
25 min.
Rectangular
A16ZJ-5060 Panel Cutouts
Square
A16ZA-5060
24
24
Cover B (transparent)
Cover A (black)
19.6
2713.8
25 min.
25 min.
16 dia.
+0.2
0
Panel Cutouts
Round
A16ZT-5060
24 dia.
Cover B (transparent)
Cover A (black)
19.6
2713.8
25 min.
25 min.
16 dia.
+0.2
0
Panel Cutouts
A16
24
Safety Precautions
Refer to Safety Precautions for All Pushbutton Switches/Indicators.
Do not apply a voltage between the incandescent
lamp and the terminal that is greater than the rated
voltage. If the incandescent lamp is broken, the
operating part may pop out.
Always turn OFF the power and wait for 10 minutes
before replacing the incandescent lamp. If the lamp is
replaced immediately after the power is turned OFF,
the remaining heat may cause burns.
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 nut more than necessary using tools
such as pointed-nose pliers. Doing so will damage the mounting
nut.
The tightening torque is 0.29 to 0.49 N·m.
Wiring
•Solder terminals and quick-connect terminals (#110) are commonly
used for terminals.
•Be sure to use electrical wires that are a size appropriate for the
applied voltage and carry current (conductor size is 0.5 to 0.75
mm2). Perform soldering according to the conditions provided
below. If the soldering is not properly performed, the lead wires will
become detached, resulting in short-circuits.
1. Hand soldering: 350°C, within 3 s
2. Dip soldering: 350°C, within 3 s
Wait for one minute after soldering before exerting any external
force on the solder.
•Use non-corrosive resin fluid as the flux.
•Make sure that the electric cord is wired so that it does not touch
the Unit. If the electric cord touches the Unit, then electric wires with
a heat resistance of 100°C min. must be used.
•After wiring the Switch, maintain an appropriate clearance and
creepage distance.
Operating Environment
•This Switch is intended for indoor use only. Using the Switch
outdoors will cause the Switch to fail. If IP40 models are used in
locations subject to dust, metallic particles, or oil, be careful that
none of these penetrates the Switch.
•The IP66 model is designed with a degree of protection so that it
will not sustain damage if it is subjected to water from any direction
to the front of the panel.
•Do not use the Switch submersed in oil or water, or in locations
continuously subject to splashes of oil or water. Doing so may result
in oil of water entering the Switch.
Using the Microload
•Insert a contact protection circuit, if necessary, to prevent the
reduction of life expectancy due to extreme wear on the contacts
caused by loads where inrush current occurs when the contact is
opened and closed.
•The A16 allows both a standard load (125 V at 5A, 250 V at 3 A)
and a microload. If a standard load is applied, however, the
microload area cannot be used. If the microload area is used with a
standard load, the contact surface will become rough, and the
opening and closing of the contact for a microload may become
unreliable.
•The minimum applicable load is the N-level reference value. This
value indicates the malfunction reference level for the reliability
level of 60% (λ 60) (conforming to JIS C5003).
The equation, λ 60 = 0.5 × 10-6/operations indicates that the
estimated malfunction rate is less than 1/2,000,000 operations with
a reliability level of 60%.
LED
•The LED current-limiting resistor is built-in, so external resistance
is not required. LEDs with a rated voltage of 12 or 24 V have a built-
in diode bridge and no polarity. LEDs with a rated voltage of 5 V
have polarity.
Others
•The oil-resistant IP66 uses NBR rubber and is resistant to general
cutting oil and cooling oil. Some particular oils cannot be used with
the oil-resistant IP66, however, so contact your OMRON
representative for details.
•The durability of the Switch depends in the switching conditions.
Always test the Switch under actual application conditions to
confirm applicability and use the Switch only for the number of
switching operations that will not affect performance.
Continuing to use the Switch with degraded performance will
eventually result insulation faults between circuits, burning of the
Switch, or other failures.
•If the panel is to be finished with coating, etc., make sure that the
panel meets the specified dimensions after the coating.
•Do not subject the Switch to extreme shock or vibration. Doing so
will cause malfunctions and damage to the Switch.
•Do not let sharp objects come into contact with the Switches that
are made of resin. Doing so will damage the Switches, causing
scratches on the outside of the operating parts, and malfunction.
When handling the Switches, do not throw or drop them.
WARNING
Precautions for Correct Use
Rated voltage Internal limiting resistor
5 VDC Red, yellow, white: 300 Ω
Green, blue, pure white: 160 Ω
12 VAC/VDC Red, yellow, white: 1 kΩ
Green, blue, pure white: 910 Ω
24 VAC/VDC 2.4 kΩ
Invalid
area
0.1 1 10 100 1,000
1 mA
5
12
24
30
0.15 mA
Current (mA)
Voltage (V)
0
Microload area
25
A16
•Rubber is used inside IP66 models. Do not allow the rubber to
become scratched or foreign matter to become attached to the
rubber.
Scratches and foreign matter will degrade the waterproofing, and
the Switch may fail operate correctly.
Screw-less Clamp Wiring Procedure
Connecting Wires
1. Strip the wires for 10 mm (allowable range: 10± 1 mm).
2. If braided wire is used, twist the wire to straighten it out.
3. Insert the wire into the insertion hole while pressing the release
button at the side of the hole. (Using a precision screwdriver is
recommended.)
4. Let go of the release button to lock the wire into place.
5. After locking, pull on the wire gently to confirm that it is securely
locked.
Removing Wires
1. Remove wires by pulling them while pressing the release button.
Note: When reusing wires that have already been locked one, cut off the end of
the wire and strip the wire again before using.
Precautions
1. The mounting panel thickness must be 0.5 to 3.2 mm.
2. The mounting ring must be tightened to a torque 0.29 to 0.49 N·m.
3. The procedure for making the mounting hole for the screw-less
clamp connector is described on page 21. A mounting dimension
of at least 33 mm is required, however, because the Switch is
removed with the screw-less clamp connector mounted to the
panel. If Switches are mounted side-by-side separated by less
than the specified distance, it may not be possible to remove the
Switch.
4. Be sure to mount the Case to the Switch with the correct
orientation. Mount with the dimple on the Case facing in the same
direction as the side of the Switch with the direction arrow or the
word TOP.
5. Bend the end of the wire if braided wire is used with the screw-
less clamp connector.
6. When wiring, insert the wire until it comes into contact with
something. After wiring is completed, pull on the wires to confirm
that they are connected securely.
7. After wiring, ensure that continuous pressure is not applied to the
terminals.
8. Refer to internal connection diagrams and confirm the terminal
numbers before wiring.
Do not allow the Switch
to drop and hit the
ground.
Do not place or drop
heavy objects on the
Switch.
Do not operate the Switch
with hard or sharp objects.
Screwdriver
Hammer
Switch
Direction arrow
Case
dimple
Switch
TOP mark
Case
dimple
A16
26
Panel Mounting
After mounting the Pushbutton Unit to the panel, snap in the Switch
from the back of the panel.
Mounting to the Panel
•Insert the Pushbutton Unit into the front of the panel, and fix the lock
ring and mounting nut from the terminal side.
•Make sure that the lock ring is aligned with the thread of the Case
and the edge of the lock ring is touching the panel.
•Tighten the mounting nuts to a torque of 0.29 to 0.49 N·m.
Mounting the Switch Unit
•Snap on the Switch Unit to the Pushbutton Unit.
•Make sure that the Switch Unit has the correct orientation when
snapping it onto the Case. Align the dimple on the Case with the
groove between the case guards on the NC terminal side of the
Switch Unit in the way shown below, and push the Switch Unit into
the Case until it clicks into place. Confirm that the Switch Unit is
securely in place before using.
Removing the Switch Unit
•Grip the part between the Switch holder of the Case and the Switch
Unit using the A16Z-5080 Extractor, and pull to remove the Switch
Unit.
Note: Refer to page 21 for PCB terminals.
Engraving
Engraving the Legend Plate
•The characters must not be engraved deeper than 0.4 mm.
•Apply an alcohol-based paint coating, such as melamine,
phthalate, or acrylic resin paint coating.
Mounting and Replacing the Pushbutton
Removing and Mounting the Pushbutton
(1) Remove the Pushbutton as shown in the following diagram. If the
Pushbutton cannot be removed by hand, use the A3PJ-5080
Extractor.
(2) When mounting the Operation Unit to the Case, press the entire
surface of the Operation Unit to surface A of the Case as shown
in the following diagram.
Case
Panel
Mounting nut
Lock ring
Edge
Thread
dimple NC terminal
Groove between case guards
A16Z-5080 Extractor
Pushbutton
Case Surface A
Operation Unit
27
A16
Removing the Lamp
(1) Removing from the Pushbutton End
(2) Removing from the Switch End
The Lamp can be removed by hand once the Switch is removed
using the A16Z-5080 Extractor.
Installing the Lamp
•When mounting the Lamp, make sure it is facing the direction
shown in the following diagram. Insert the Lamp while matching the
protruding part of the Lamp and the small guides on the outer
surface of the Case.
•The Lamp can be mounted from the Pushbutton end by using the
A16Z-5080 Extractor.
The lamp can be mounted by following the opposite procedure for
removing the Lamp.
Mounting the A16Z Dust Cover
Mounting the A16Z Switch Guard
Lamp
Grip the Lamp with the
A16Z-5080 Extractor
and pull to remove.
Protruding part
Mounting nut
Switch
Lock ring
Panel
Set
A16ZJ-5060
Cover A
(black)
Pushbutton Unit
Cover B
(transparent)
1. Separate the Dust Cover into 2 parts: cover A and cover B.
2. Insert the Case (Pushbutton Unit) into cover A.
3. Mount these parts together onto the panel.
4. From the back of the panel, mount the lock ring and secure with the
mounting nut.
5. Insert cover B into cover A. Ensure that the entire perimeter of cover B
is securely attached to cover A by pressing in different directions.
6. Mount the Switch to the Case.
Note: Recommended panel thickness: 0.5 to 2 mm.
Switch Guard
Switch
Mounting nut
Lock ring
Pushbutton Unit
Panel
1. Insert the Case (Pushbutton Unit) into the Switch Guard.
2. Mount these parts together onto the panel.
3. From the back of the panel, mount the lock ring and secure with the
mounting nut.
4. Mount the Switch to the Case.
Note: Recommended panel thickness: 0.5 to 2 mm.
Terms and Conditions Agreement
Read and understand this catalog.
Please read and understand this catalog before purchasing the products. Please consult your OMRON representative if you
have any questions or comments.
Warranties.
(a) Exclusive Warranty. Omron’s exclusive warranty is that the Products will be free from defects in materials and workmanship
for a period of twelve months from the date of sale by Omron (or such other period expressed in writing by Omron). Omron
disclaims all other warranties, express or implied.
(b) Limitations. OMRON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, ABOUT
NON-INFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OF THE PRODUCTS. BUYER
ACKNOWLEDGES THAT IT ALONE HAS DETERMINED THAT THE
PRODUCTS WILL SUITABLY MEET THE REQUIREMENTS OF THEIR INTENDED USE.
Omron further disclaims all warranties and responsibility of any type for claims or expenses based on infringement by the
Products or otherwise of any intellectual property right. (c) Buyer Remedy. Omron’s sole obligation hereunder shall be, at
Omron’s election, to (i) replace (in the form originally shipped with Buyer responsible for labor charges for removal or
replacement thereof) the non-complying Product, (ii) repair the non-complying Product, or (iii) repay or credit Buyer an amount
equal to the purchase price of the non-complying Product; provided that in no event shall Omron be responsible for warranty,
repair, indemnity or any other claims or expenses 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. Return of any Products by Buyer must be approved in writing by Omron before shipment. Omron Companies shall
not be liable for the suitability or unsuitability or the results from the use of Products in combination with any electrical or
electronic components, circuits, system assemblies or any other materials or substances or environments. Any advice,
recommendations or information given orally or in writing, are not to be construed as an amendment or addition to the above
warranty.
See http://www.omron.com/global/ or contact your Omron representative for published information.
Limitation on Liability; Etc.
OMRON COMPANIES SHALL NOT BE LIABLE FOR SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES,
LOSS OF PROFITS OR PRODUCTION OR COMMERCIAL LOSS IN ANY WAY CONNECTED WITH THE PRODUCTS,
WHETHER SUCH CLAIM IS BASED IN CONTRACT, WARRANTY, NEGLIGENCE OR STRICT LIABILITY.
Further, in no event shall liability of Omron Companies exceed the individual price of the Product on which liability is asserted.
Suitability of Use.
Omron Companies shall not be responsible for conformity with any standards, codes or regulations which apply to the
combination of the Product in the Buyer’s application or use of the Product. At Buyer’s request, Omron will provide applicable
third party certification documents identifying ratings and limitations of use which apply to the Product. This information by itself
is not sufficient for a complete determination of the suitability of the Product in combination with the end product, machine,
system, or other application or use. Buyer shall be solely responsible for determining appropriateness of the particular Product
with respect to Buyer’s application, product or system. Buyer shall take application responsibility in all cases.
NEVER USE THE PRODUCT FOR AN APPLICATION INVOLVING SERIOUS RISK TO LIFE OR PROPERTY OR IN LARGE
QUANTITIES WITHOUT ENSURING THAT THE SYSTEM AS A WHOLE HAS BEEN DESIGNED TO ADDRESS THE RISKS,
AND THAT THE OMRON PRODUCT(S) IS PROPERLY RATED AND INSTALLED FOR THE INTENDED USE WITHIN THE
OVERALL EQUIPMENT OR SYSTEM.
Programmable Products.
Omron Companies shall not be responsible for the user’s programming of a programmable Product, or any consequence
thereof.
Performance Data.
Data presented in Omron Company websites, catalogs and other materials 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 user must correlate
it to actual application requirements. Actual performance is subject to the Omron’s 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 part numbers when published ratings or features are changed, or when significant construction changes are
made. However, some specifications of the Product may be changed without any notice. When in doubt, special part numbers
may be assigned to fix or establish key specifications for your application. Please consult with your Omron’s representative at
any time to confirm actual specifications of purchased Product.
Errors and Omissions.
Information presented by Omron Companies has been checked and is believed to be accurate; however, no responsibility is
assumed for clerical, typographical or proofreading errors or omissions.
2019.1
In the interest of product improvement, specifications are subject to change without notice.
OMRON Corporation
Industrial Automation Company
http://www.ia.omron.com/ (c)Copyright OMRON Corporation 2019 All Right Reserved.
