MICRO SWITCH™
Snap-in Panel Mount Basic Switches
DM | DP Series
Datasheet
2sensing.honeywell.com
What makes our switches better?
• The right switch at the right cost for the product performance
Series meets industries’ most common standard applications
eliminating need for product modifications
Repeatable and consistent performance for up to
one million lifecycles
DP Series meets UL 508 requirements with extended electrical
endurance for industrial applications
MICRO SWITCH™ DM | DP Series
Snap-in Panel Mount Basic Switches
MICRO SWITCH™ DM/DP basic switches are designed for a variety of applications, and known for their compact,
lightweight design and accurate repeatability. The DM/DP Series is a special application precision switch that can be
used in a variety of applications, including appliance door lights and door interlocks, as well as service panels.
The DM/DP Series snap-action switches have momentary, push-pull, and pull-to-cheat configurations. The quick-
connect terminals and snap-in, panel-mount housings provide easy installation. In addition to the standard quick-
connect terminals (4,78 mm x 0,51 mm [0.188 in x 0.020 in]), larger 6,35 mm x 0,81 mm [0.25 in x 0.032 in] quick-
connect terminals can be provided.
INDUSTRY STANDARD
VALUE • RELIABLE
3
sensing.honeywell.com
Features
and Benefits
EASY INSTALLATION
Attractive, rugged snap-in design allows these switches to be easily installed.
Quick-connect terminals reduce installation time.
VARIETY OF CIRCUITRIES AND OPERATING ACTIONS
DM and DP Series switches offer a choice of momentary, push-pull, or pull-
to-cheat actions to meet equipment requirements. Circuitry options of SPDT,
DPDT, and SPNO fit a number of applications.
LONG LIFE
With a mechanical life of up to 1,000,000 operations, DM and DP Series
switches deliver repeatable and consistent performance.
WIDE OPERATING TEMPERATURE RANGE
DM and DP Series operate from -37 °C to 82 °C [-35 °F to 180 °F] to meet
many different environmental requirements.
EASILY CONTROLS LOW-VOLTAGE DC APPLICATIONS
Switches available with a choice of silver or gold-alloy contacts to handle a
variety of electrical load requirements.
MEETS UL 508
DP Series meets Industrial Control Equipment’s (UL508) requirements with
extended electrical endurance of 100,000 operations for long-life applications.
NORTH AMERICAN APPROVALS
DP: UL recognized file #E22779, CSA certified file #LR4442
DM: UL recognized file #E12252, CSA certified file #LR4442
UL 508 for industrial control equipment
Options for low energy circuits
4sensing.honeywell.com
APPLIANCE DOOR LIGHTS
Used in turning lights “on” in refrigerators and freezers when the door is opened
DOOR INTERLOCKS
Found as a door interlock on residential HVAC equipment and service panels to
interrupt power when door access panels are opened
INDICATOR CIRCUITS
Often used for general purposes to turn lights “on” or “off” when doors and/or
panels are opened
Potential Applications
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sensing.honeywell.com
MICRO SWITCH™ Snap-in Panel Mount Basic Switches
Table 1. Specifications
Characteristic Parameter
Description snap-in panel mount basic switch
Actuators
momentary action
push-pull
push momentary, pull-to-cheat
Terminations quick connect, 4,78 mm x 0,51 mm [0.188 in x 0.020 in]
Amp rating 10 A, 16 A
Operating temperature -37 °C to 82 °C [-35 °F to 180 °F]
Operating force 4,17 N [15 oz] max.
Mechanical life 1 million operations, 95 % survival
Circuitry SPNO, SPDT, DPDT
Voltage 125 Vac, 250 Vac, 277 Vac
Approvals UL, CSA
Table 2. Electrical Ratings
Series Electrical rating
DM UL and CSA rating: 10 A, 1/2 HP, 125, 250 or 277 Vac
DP UL standard 508, 14 A, 3/4 HP, 125, 250 Vac;
Pilot Duty: 150 V A – 125, 250 Vac; 16 A, 125, 250, 277 Vac; 3/4 HP, 125, 250 Vac
MOMENTARY ACTION
Momentary action switches are available in a choice of concave,
convex, or bullet nose plunger styles.
Concave plunger Convex plunger
Bullet-nose plunger
Pull-to-cheat plunger
PUSH-PULL
When plunger is depressed, it remains in the depressed position
and maintains circuit transfer. Switch contacts return to the previ-
ous position when the plunger is pulled to the original extended
position.
PULL-TO-CHEAT
Pull-to-cheat operates normally as a momentary action switch.
However, by pulling the plunger beyond the normal free position, a
maintained-on position is achieved.
POSSIBLE VARIATIONS
In addition to the standard quick-connect 4,78 mm x 0,51 mm
[0.188 in x 0.020 in] terminals, 6,35 mm x 0,81 mm [0.25 in x
0.032 in] terminals can be provided. The quick-connect terminals
can be provided with terminals formed at different angles. DM
plungers and faceplates are available in combinations of white,
black, gray, or red.
6sensing.honeywell.com
DM | DP Series
1DM Series 1DM Series 1DM Series
Free position 22,4 mm [0.88 in] 11,4 mm [0.45 in] 11,4 mm [0.45 in]
Operating position 19,1 mm ±1,5 mm
[0.750 in ±0.06 in] -9,02 mm ±1,5 mm
[0.355 in ±0.06 in]
Overtravel 9,53 mm [0.375 in] 3,05 mm [0.120 in] 3,05 mm [0.12 in]
Operating force 4,17 N [15 oz] 4,17 N [15 oz] 4,17 N [15 oz]
Release force 0,83 N [3 oz] 0,83 N [3 oz] 0,83 N [3 oz]
Action Circuitry Plunger type Plunger
color
Faceplate
color
Momentary SPDT Bullet nose White White 1DM1
Momentary SPNC Bullet nose White White 1DM2
Momentary SPNO Bullet nose White White 1DM3
Momentary SPDT Concave Black Gray 1DM18
Momentary SPDT Convex White White 1DM21
DM301 Series 2DM Series DM401 Series
Free position 24,1 mm [0.95 in] 11,4 mm [0.45 in] 17,8 mm [0.70 in]
Operating position ---
Overtravel 15,9 mm [0.625 in] 3,05 mm [0.12 in] 13,2 mm [0.52 in]
Operating force - 6,67 N [24 oz] 4,17 N [15 oz]
Release force - 1,67 N [6 oz] 0,83 N [3 oz]
Action Circuitry Plunger type Plunger
color
Faceplate
color
Push-Pull SPDT Finger grip Black Gray 1DM301
Push-Pull DPDT Finger grip Black Gray 2DM301
Momentary DPDT Concave Red Gray 2DM6
Pull-to-Cheat SPDT Finger grip White White 1DM401**
** Extended position 23,6 mm (.930 in. max.)
DM SERIES ORDER GUIDE
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sensing.honeywell.com
MICRO SWITCH™ Snap-in Panel Mount Basic Switches
2DM Series DM409 Series
Free position 22,4 mm [0.88 in] 21,6 mm [0.85 in]
Operating position 19,6 mm ±1,0 mm
[0.770 in ±0.040 in]
18,9 mm ±1,3 mm
[0.745 in ±0.050 in]
Overtravel 10,2 mm [0.40 in] 15,0 mm [0.59 in]
Operating force 6,67 N [24 oz] 6,67 N [24 oz]
Release force 1,67 N [6 oz] -
Action Circuitry Plunger type Plunger
color
Faceplate
color
Momentary DPDT Bullet nose Black Black 2DM1
Pull-to-Cheat DPDT Finger grip Black Black 2DM409
* Latch position 16,9 mm ± 0,76 mm (.665 in. ± .030 in.)
DP Series DP Series
Free position 22,4 mm [0.88 in] 31,52 mm [1.242 in]
Operating position 15,1 mm ±1,5 mm
[0.595 in ±0.06 in]
28,22 mm ±1,5 mm
[1.112 in ±0.06 in]
Overtravel 9,53 mm [0.375 in] 4,44 mm [0.175 in]
Operating force 4,45 N [16 oz] 8,34 N [30 oz]
Release force 0.83 N [3 oz] 0.83 N [3 oz]
Action Circuitry Plunger type Plunger
color
Faceplate
color
Momentary SPNO Bullet nose White White 1DP5
Momentary SPNO Finger grip White White 1DP8
DM SERIES ORDER GUIDE
DP SERIES ORDER GUIDE
8sensing.honeywell.com
DM | DP Series
1DM1, 1DM2, 1DM3 DIMENSIONS
1DM18 DIMENSIONS
1DM21, 1DM38 DIMENSIONS
17,27 mm
[0.68 in] 4X Ø 1,53 mm
[4X Ø 0.06 in]
31,75 mm
[1.25 in]
9,53 mm [0.375 in] max. full overtravel position
16,06 mm ±1,5 mm [0.75 in ±0.06 in] operating position
22,4 mm ±1,27 mm [0.88 in ±0.05 in] fr
ee position
11,7 mm [0.46 in]
SR 6,35 mm
[SR 0.25 in]
Ø 8,63 mm [Ø 0.35 in]
9° max.
7,61 mm
[0.30 in] 4X R 1,53 mm [4X R 0.06 in]
R 1,02 mm [R 0.04 in]
13,32 mm [0.525 in]
1,52 mm [0.08 in]
1,57 mm [0.062 in]
24,64 mm
[0.97 in] 2,8 mm
[0.11 in]
2X 80°
4,82 mm
[0.19 in]
5,84 mm
[0.23 in]
23,4 mm
[0.92 in]
3X 6,4 mm [3X 0.25 in]
10,66 mm
[0.42 in]
1,14 mm to 2,54 mm thick mounting panel
[0.045 in to 0.10 in thick mounting panel]
Common
terminal
Normally
closed
terminal
Normally
open
terminal
11,17 mm
[0.44 in]
3X 4,77 mm x 0,51 mm
[3X 0.188 in x 0.02 in]
quick connect terminal
17,27 mm
[0.68 in] 4X Ø 1,53 mm
[4X Ø 0.06 in]
31,75 mm
[1.25 in]
3,05 mm [0.120 in] max. full overtravel position
9,0 mm ±1,5 mm [0.355 in ±0.06 in] operating position
11,43 mm [0.45 in] free position
11,7 mm [0.46 in]
SR 12,7 mm
[SR 0.5 in]
Ø 8,63 mm [Ø 0.35 in]
4X R 1,53 mm [4X R 0.06 in]
13,32 mm [0.525 in]
1,52 mm [0.08 in]
1,57 mm [0.062 in]
24,64 mm
[0.97 in] 2,8 mm
[0.11 in]
2X 80°
4,82 mm
[0.19 in]
5,84 mm
[0.23 in]
23,4 mm
[0.92 in]
3X 6,4 mm [3X 0.25 in]
10,66 mm
[0.42 in]
1,14 mm to 2,54 mm thick mounting panel
[0.045 in to 0.10 in thick mounting panel]
Common
terminal
Normally
closed
terminal
Normally
open
terminal
11,17 mm
[0.44 in]
3X 4,77 mm x 0,51 mm
[3X 0.188 in x 0.02 in]
quick connect terminal
Ø 8,3 mm
[Ø 0.325 in]
17,27 mm
[0.68 in] 4X Ø 1,53 mm
[4X Ø 0.06 in]
31,75 mm
[1.25 in]
Ø 8,63 mm [Ø 0.35 in]
4X R 1,53 mm [4X R 0.06 in]
13,32 mm [0.525 in]
1,52 mm [0.08 in]
1,57 mm [0.062 in]
24,64 mm
[0.97 in] 2,8 mm
[0.11 in]
2X 80°
4,82 mm
[0.19 in]
5,84 mm
[0.23 in]
23,4 mm
[0.92 in]
3X 6,4 mm [3X 0.25 in]
10,66 mm
[0.42 in]
1,14 mm to 2,54 mm thick mounting panel
[0.045 in to 0.10 in thick mounting panel]
Common
terminal
Normally
closed
terminal
Normally
open
terminal
11,17 mm
[0.44 in]
3X 4,77 mm x 0,51 mm
[3X 0.188 in x 0.02 in]
quick connect terminal
3,04 mm [0.120 in] max. full overtravel position
11,43 mm [0.45 in] free position
11,68 mm
[0.46 in]
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sensing.honeywell.com
MICRO SWITCH™ Snap-in Panel Mount Basic Switches
1DM301, 2DM301 DIMENSIONS (two-pole version shown)
2DM6 DIMENSIONS
1DM401 DIMENSIONS
17,27 mm
[0.68 in]
4X Ø 1,53 mm
[4X Ø 0.06 in]
39,88 mm
[1.57 in]
3,04 mm [0.120 in] max. full overtravel position
11,43 mm [0.45 in] free position
SR 12,7 mm
[SR 0.50 in]
Ø 8,6 mm [Ø 0.34 in]
12°
2X R 1,53 mm [2X R 0.06 in]
13,32 mm [0.525 in]
1,52 mm
[0.08 in]
1,57 mm [0.062 in]
38,1 mm [1.5 in]
5,33 mm
[0.21 in]
6X 6,4 mm [6X 0.25 in]
1,14 mm to 2,54 mm thick mounting panel
[0.045 in to 0.10 in thick mounting panel] 11,17 mm
[0.44 in]
6X 4,77 mm x 0,51 mm
[6X 0.188 in x 0.02 in]
quick connect terminal
12°
5,33 mm
[0.21 in]
9,9 mm
[0.39 in]
9,9 mm
[0.39 in]
13,45 mm
[0.53 in]
13,45 mm
[0.53 in]
33,5 mm [1.32 in]
33,5 mm [1.32 in]
26,2 mm
[1.03 in]
17,27 mm
[0.68 in]
4X Ø 1,53 mm
[4X Ø 0.06 in]
39,88 mm
[1.57 in]
15,86 mm [0.625 in] max. full overtravel position
24,13 mm [0.95 in] free position
2X R 1,53 mm [2X R 0.06 in]
13,32 mm [0.525 in]
1,52 mm
[0.08 in]
1,57 mm [0.062 in]
38,1 mm [1.5 in]
6X 6,4 mm [6X 0.25 in]
1,14 mm to 2,54 mm thick mounting panel
[0.045 in to 0.10 in thick mounting panel] 11,17 mm
[0.44 in]
6X 4,77 mm x 0,51 mm
[6X 0.188 in x 0.02 in]
quick connect terminal
26,2 mm
[1.03 in]
R 12,7 mm
[R 0.50 in]
12°
5,33 mm
[0.21 in]
9,9 mm
[0.39 in]
13,45 mm
[0.53 in]
33,5 mm [1.32 in]
5,33 mm
[0.21 in]
9,9 mm
[0.39 in]
13,45 mm
[0.53 in]
12°
1,52 mm
[0.08 in]
17,27 mm
[0.68 in] 4X Ø 1,53 mm
[4X Ø 0.06 in]
31,75 mm
[1.25 in]
13,2 mm [0.52 in] max. full overtravel position
23,6 mm max. [0.93 in max.] extended position
17,8 mm [0.70 in] free position
11,7 mm [0.46 in]
Ø 8,6 mm [Ø 0.34 in]
4X R 1,53 mm [4X R 0.06 in]
13,32 mm [0.525 in]
1,52 mm [0.08 in]
1,57 mm [0.062 in]
24,64 mm
[0.97 in] 2,8 mm
[0.11 in]
2X 80°
4,82 mm
[0.19 in]
5,84 mm
[0.23 in]
23,4 mm
[0.92 in]
3X 6,4 mm [3X 0.25 in]
10,66 mm
[0.42 in]
1,14 mm to 2,54 mm thick mounting panel
[0.045 in to 0.10 in thick mounting panel]
Common
terminal
Normally
closed
terminal
Normally
open
terminal
11,17 mm
[0.44 in]
3X 4,77 mm x 0,51 mm
[3X 0.188 in x 0.02 in]
quick connect terminal
1,52 mm [0.08 in]
9,7 mm
[0.38 in]
10 sensing.honeywell.com
DM | DP Series
2DM1 DIMENSIONS
2DM409 DIMENSIONS
17,27 mm
[0.68 in]
4X Ø 1,53 mm
[4X Ø 0.06 in]
39,88 mm
[1.57 in]
10,16 mm [0.40 in] max. full overtravel position
22,4 mm [0.88 in] free position
SR 6,4 mm
[SR 0.25 in]
Ø 8,6 mm [Ø 0.34 in]
12°
2X R 1,53 mm [2X R 0.06 in]
13,32 mm [0.525 in]
1,52 mm
[0.08 in]
1,57 mm [0.062 in]
38,1 mm [1.5 in]
5,33 mm
[0.21 in]
6X 6,4 mm [6X 0.25 in]
1,14 mm to 2,54 mm thick mounting panel
[0.045 in to 0.10 in thick mounting panel] 11,17 mm
[0.44 in]
6X 4,77 mm x 0,51 mm
[6X 0.188 in x 0.02 in]
quick connect terminal
9,9 mm
[0.39 in]
13,45 mm
[0.53 in]
33,5 mm [1.32 in]
26,2 mm
[1.03 in]
9° max.
R 1,02 mm [R 0.04 in]
5,33 mm
[0.21 in]
9,9 mm
[0.39 in]
13,45 mm
[0.53 in]
12°
7,62 mm
[0.30 in]
17,27 mm
[0.68 in]
4X Ø 1,53 mm
[4X Ø 0.06 in]
39,88 mm
[1.57 in]
14,97 mm [0.59 in] max. full overtravel position
21,57 mm [0.85 in] free position
SR 4,57 mm
[SR 0.18 in]
Ø 8,6 mm [Ø 0.34 in]
2X R 1,53 mm [2X R 0.06 in]
13,32 mm [0.525 in]
1,52 mm
[0.08 in]
1,57 mm [0.062 in]
38,1 mm [1.5 in]
6X 6,4 mm [6X 0.25 in]
1,14 mm to 2,54 mm thick mounting panel
[0.045 in to 0.10 in thick mounting panel] 11,17 mm
[0.44 in]
6X 4,77 mm x 0,51 mm
[6X 0.188 in x 0.02 in]
quick connect terminal
26,2 mm
[1.03 in]
R 7,61 mm
[R 0.30 in]
12°
5,33 mm
[0.21 in]
9,9 mm
[0.39 in]
13,45 mm
[0.53 in]
33,5 mm [1.32 in]
5,33 mm
[0.21 in]
9,9 mm
[0.39 in]
13,45 mm
[0.53 in]
12°
2,03 mm [0.08 in]
7,62 mm
[0.30 in]
25,13 mm [0.90 in] extended position
18,91 mm [0.745 in] operating position
11
sensing.honeywell.com
MICRO SWITCH™ Snap-in Panel Mount Basic Switches
1DP5, 1DP8 DIMENSIONS
17,27 mm
[0.68 in] 4X Ø 1,53 mm
[4X Ø 0.06 in]
31,75 mm
[1.25 in]
5,6 mm [0.22 in] max. full overtravel position
15,11 mm [0.595 in] operating position
18,42 mm [0.725 in] free position
11,7 mm [0.46 in]
SR 6,35 mm
[SR 0.25 in]
Ø 8,63 mm [Ø 0.35 in]
9° max.
7,61 mm
[0.30 in]
4X R 1,53 mm [4X R 0.06 in]
R 1,02 mm [R 0.04 in]
13,32 mm [0.525 in]
1,52 mm [0.08 in]
1,57 mm [0.062 in]
24,64 mm
[0.97 in] 11,43 mm
[0.45 in]
80°
23,4 mm
[0.92 in]
10,66 mm
[0.42 in]
1,14 mm to 2,54 mm thick mounting panel
[0.045 in to 0.10 in thick mounting panel]
Common
terminal
Stop
contact
Normally
open
terminal
11,17 mm
[0.44 in]
2X 6,35 mm x 0,81 mm
[2X 0.25 in x 0.032 in]
quick connect terminal
This Honeywell datasheet supports the following MICRO SWITCH™ DM & DP Series Basic Switch Listings
1DM1
1DM152
1DM171
1DM175
1DM176
1DM18
1DM2
1DM21
1DM23
1DM3
1DM301
1DM32
1DM335
1DM338
1DM401
1DM418
1DM423
1DM425
1DM435
1DM437
1DM5
1DM502
1DM503
1DM57
1DM79
1DP5
PANEL CUTOUTS
1DP8
2DM1
2DM11
2DM301
2DM310
2DM4
2DM409
2DM438
2DM6
2DM640
2DM8
2DM83
DM-10692
12 sensing.honeywell.com
DM | DP Series
ADDITIONAL INFORMATION
The following associated literature is available on Honeywell’s web
site at sensing.honeywell.com:
• Product installation instructions
• Product range guide
• Product application-specific information
– Application note: Sensors and Switches in Chemistry Analyzers
WARNING
PERSONAL INJURY
DO NOT USE these products as safety or emergency stop
devices or in any other application where failure of the
product could result in personal injury.
Failure to comply with these instructions could result in
death or serious injury.
WARNING
MISUSE OF DOCUMENTATION
• The information presented in this product sheet is for
reference only. Do not use this document as a product
installation guide.
• Complete installation, operation, and maintenance
information is provided in the instructions supplied with
each product.
Failure to comply with these instructions could result in
death or serious injury.
WARRANTY/REMEDY
Honeywell warrants goods of its manufacture as being free of
defective materials and faulty workmanship. Honeywell’s standard
product warranty applies unless agreed to otherwise by Honeywell
in writing; please refer to your order acknowledgement or consult
your local sales office for specific warranty details. If warranted
goods are returned to Honeywell during the period of coverage,
Honeywell will repair or replace, at its option, without charge those
items it finds defective. The foregoing is buyer’s sole remedy
and is in lieu of all other warranties, expressed or implied,
including those of merchantability and fitness for a particu-
lar purpose. In no event shall Honeywell be liable for conse-
quential, special, or indirect damages.
While we provide application assistance personally, through our
literature and the Honeywell website, it is up to the customer to
determine the suitability of the product in the application.
Specifications may change without notice. The information we
supply is believed to be accurate and reliable as of this printing.
However, we assume no responsibility for its use.
004980-2-EN IL50 GLO
November 2013
Copyright © 2013 Honeywell International Inc. All rights reserved.
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