Datasheet
MICRO SWITCH Premium Subminiature Basic Switches
SM Series
DESCRIPTION
The industry-defining name in snap-action switches,
Honeywell MICRO SWITCH premium subminiature switches
are designed for repeatability and enhanced product life. The
MICRO SWITCH SM Series delivers consistent performance
within a range of conditions.
The MICRO SWITCH SM Series’ small size and light weight are
combined with ample electrical capacity, precision operation,
and extended life. Featuring high precision and repeatability,
the SM Series offers gold contacts for low-energy switching
and gold bifurcated contacts for maximum reliability.
Bifurcated contacts provide parallel redundancy within the SM
switch.
The SM switch is available for power-duty switching up to 11 A
(Vac) or 1/4 HP (Vac).
DIFFERENTIATION
• Very wide temperature range allows for years of reliable
performance in the harshest of conditions
• MILPRF8805 qualified listings
• Operating forces as low as 0,06 N [6 g] and differential travel
as low as 0,025 mm [0.001 in] delivers consistent, precise
switch characteristics
FEATURES
• Industry-leading mechanical life of up to 10,000,000
operations
• Selection of actuation, electrical termination, and operating
characteristics along with high-temperature construction
options
• Wide temperature range of 54°C to 204°C [65°F to 400°F]
• MILPRF8805 qualified listings in a lightweight, small
package
• FAAPMA approvals for commercial aircraft
• Choice of silver or gold-plated, or gold bifurcated contacts to
handle a variety of electrical load requirements
• UL/CSA, cUL, ENEC, and CE approvals
VALUE TO CUSTOMERS
• Industry-leading life cycle rating reduces the need to
replace switches over life in an OEM platform – reducing
total system cost
• Low operating forces
• Mil-qualified listings
• Life of up to 10,000,000 cycles
POTENTIAL APPLICATIONS
• Precision switch assemblies for commercial aircraft to
monitor doors for “closed” and “locked” position
• Landing gear monitor
• Precision switch assemblies for commercial cockpit
applications for pushbuttons, toggle, or joystick assemblies
• Precision switch assemblies in military applications
• Assemblies for industrial pressure switches and temperature
switches
• Power generation fuel level (gas and oil)
PORTFOLIO
The SM Series of premium subminiature basic switches are
a part of a strong offering of submins including SX Series
(premium) and ZM, ZM1, ZD, ZX, and ZW Series (standard)
switches.
Sensing and Internet of Things
004959
Issue 3
2 sensing.honeywell.com
MICRO SWITCH Premium Subminiature Basic Switches, SM Series
Table 1. Specifications
Characteristic Parameter
Differentiator low operating force to 2 oz. max; power load switching capability to 11 A; motor load handling capacity to 1/4
HP (Vac)
Ampere rating 0.1 A to 11 A
Circuitry SPDT
Operating force 0.04 oz to 2 oz
Termination quick connect, solder, pcb
Actuator pin plunger, straight lever, roller lever, simulated roller lever, paddle lever
Voltage 115 Vac, 125 Vac, 250 Vac, 30 Vdc
Agency approvals UL, CE, CSA, ENEC, MILPRF8805, FAAPMA
Agency file information CE: 610581; UL: E12252; CSA: LR41372
Operating temperature 54°C to 121°C [65°F to 250°F]; select catalog listings 204°C [400°F]
Contacts silver, gold plated, bifurcated gold
Housing phenolic
Sealing sealed plunger on 411SM Series, other SM Series not weather sealed
Mechanical life
up to 10,000,000 operations for 11SM listings
up to 80,000 operations for 1SM/41SM listings
up to 1,000,000 operations for gold bifurcated contact
Size 12,7 mm H x 6,35 mm W x 20,3 mm L [0.5 in H x 0.25 in W x 0.8 in L]
Electrical data and UL codes
Table 2. UL Electrical Ratings
Code Circuitry Electrical data and UL codes
J SPDT 5 A res., 3 A ind., (sea level),
5 A res., 2.5 A ind., (50,000 feet), 28 Vdc. UL rating: 5 A, 250 Vac
K SPDT UL rating: 5 A, 125 or 250 Vac
M SPDT UL rating: 11 A and 1/4 hp, 125 or 250 Vac
N SPDT 1 A res., 0.5 A ind., 30 Vdc. UL rating: 1 A, 125 Vac
P SPDT 1 A res., 30 Vdc. UL rating: .1 A, 125 Vac
R SPDT
5 A res., 3 A ind., 2.4 A lamp load (sea level),
5 A res., 2.5 A ind., 2.4 A lamp load, (50,000 feet), 28 Vdc.
5 A res., 5 A ind., 1.5 A lamp load, 115 Vac. 60 Hz (sea level)
S SPDT UL rating: 4 A, 250 Vac
Sensing and Internet of Things 3
MICRO SWITCH Premium Subminiature Basic Switches, SM Series
O.F. • Operating force
R.F. • Release force
P.T. • Pretravel
O.T. • Overtravel
D.T. • Differential travel
O.P. • Operating position
Table 3. MICRO SWITCH SM Series Order Guide • Pin Plunger
Catalog
Listing Recommended For
Electrical
Data and UL
Codes
O.F.
N [oz]
R.F. min.
N [ oz]
P.T. max.
mm [in]
O.T. min.
mm [in]
D.T.
mm [in]
O.P. *
mm [in]
11SM1077-T Gold-plated contacts 0.1 A
P
0,83 to 1,39
[3 to 5] 0,28 [1] 0,51
[0.020]
0,13
[0.005] 0,1 [0.004] 8,38
[0.330]
12SM604-T Bifurcated gold contacts,
reduced rating
0.1 A
P
0,83 to 1,39
[3 to 5] 0,28 [1] 0,51
[0.020]
0,076
[0.003] 0,1 [0.004] 8,38
[0.330]
11SM23-T Gold-plated contacts 1 A
N
0,83 to 1,39
[3 to 5] 0,28 [1] 0,51
[0.020]
0,13
[0.005] 0,1 [0.004] 8,38
[0.330]
12SM4-T Enhanced reliability
(bifurcated gold contacts)
1 A
N
0,83 to 1,39
[3 to 5] 0,28 [1] 0,51
[0.020]
0,076
[0.003] 0,1 [0.004] 8,38
[0.330]
11SM701-T Lower force 4 A
S0,56 [2] 0,14 [0.5] 0,51
[0.020]
0,13
[0.005]
0,051
[0.002]
8,38
[0.330]
11SM1-T General purpose 5 A
J
0,83 to 1,39
[3 to 5] 0,28 [1] 0,51
[0.020]
0,13
[0.005] 0,1 [0.004] 8,38
[0.330]
11SM3-T Operating temps to
121°C
[250°F]
5 A
J
0,83 to 1,39
[3 to 5] 0,28 [1] 0,51
[0.020]
0,13
[0.005] 0,1 [0.004] 8,38
[0.330]
11SM244-T Operating temps to
204°C
[400°F] for 100 hours
5 A 0,83 to 1,39
[3 to 5] 0,28 [1] 0,51
[0.020]
0,13
[0.005] 0,1 [0.004] 8,38
[0.330]
11SM401-T Less differential travel 5 A
K
0,97 [3.5]
max. 0,28 [1] 0,51
[0.020]
0,13
[0.005]
0,025
[0.001]
8,38
[0.330]
21SM284-T2
(MS25085-2)
MILPRF8805
applications
5 A
R
0,83 to 1,39
[3 to 5] 0,28 [1] 0,76
[0.030]
0,13
[0.005] 0,1 [0.004] 8,38
[0.330]
21SM284
(MS25085-1)
MILPRF8805
applications, solder
terminals
5 A
R
0,83 to 1,39
[3 to 5] 0,28 [1] 0,76
[0.030]
0,13
[0.005] 0,1 [0.004] 8,38
[0.330]
22SM1-T Enhanced stability under
varying humidity
5 A
J
0,83 to 1,39
[3 to 5] 0,28 [1] 0,51
[0.020]
0,13
[0.005] 0,1 [0.004] 8,38
[0.330]
41SM1-T Up to 11 A, 1/4 HP (ac) 11 A
M
0,83 to 1,39
[3 to 5] 0,28 [1] 0,76
[0.030]
0,13
[0.005] 0,1 [0.004] 8,38
[0.330]
411SM1 Sealed plunger construction 5 A
K
0,83 to 2,09
[3 to 7.5] 0,28 [1] 0,51
[0.020]
0,13
[0.005] 0,1 [0.004] 8,38
[0.330]
411SM23 Sealed plunger construc-
tion, gold contacts
1 A
N
0,83 to 2,09
[3 to 7.5] 0,28 [1] 0,51
[0.020]
0,13
[0.005] 0,1 [0.004] 8,38
[0.330]
* except where stated ±0,38 mm [±0.015 in]
4 sensing.honeywell.com
MICRO SWITCH Premium Subminiature Basic Switches, SM Series
O.F. • Operating force
R.F. • Release force
P.T. • Pretravel
O.T. • Overtravel
D.T. • Differential travel
O.P. • Operating position
Table 4. MICRO SWITCH SM Series Order Guide • Integral Lever
Catalog
Listing Recommended For
Electrical
Data and
UL Codes
O.F.
N [oz]
R.F.
min.
N [ oz]
P.T. max.
mm [in]
O.T. min.
mm [in]
D.T.
mm [in]
O.P. *
mm [in]
311SM1-T 7,24 mm [0.285 in] straight
lever
5 A
J
0,39
[1.4]
0,07
[0.25]
2,16
[0.085]
0,51
[0.020]
0,48
[0.019]
8,64 mm ±1,5 mm
[0.34 in ±0.060 in]
311SM23-T 7,24 mm [0.285 in] straight
lever, gold contacts
1 A
N
0,39
[1.4]
0,07
[0.25]
2,16
[0.085]
0,51
[0.020]
0,48
[0.019]
8,64 mm ±1,5 mm
[0.34 in ±0.060 in]
311SM701-T 7,24 mm [0.285 in] straight
lever, lower force
4 A
S
0,16
[0.57]
0,03
[0.11]
2,16
[0.085]
0,51
[0.020]
0,36
[0.014]
8,64 mm ±1,5 mm
[0.34 in ±0.060 in]
311SM2-T 14,35 mm [0.565 in] straight
lever
5 A
J
0,31
[1.1]
0,05
[0.18]
3,05
[0.12]
0,66
[0.026]
0,69
[0.027]
8,51 mm ±2 mm
[0.335 in ±0.08 in]
311SM43-T 14,35 mm [0.565 in] straight
lever, gold contacts
1 A
N
0,31
[1.1]
0,05
[0.18]
3,05
[0.12]
0,66
[0.026]
0,69
[0.027]
8,51 mm ±2 mm
[0.335 in ±0.08 in]
311SM702-T 14,35 mm [0.565 in] straight
lever, lower force
4 A
S
0,11
[0.4]
0,02
[0.07]
3,05
[0.12]
0,66
[0.026]
0,38
[0.015]
8,51 mm ±2 mm
[0.335 in ±0.08 in]
311SM3-T 44,8 mm [1.765 in] straight
lever
5 A
J
0,15
[0.53]
0,02
[0.07]
7,87
[0.31]
1,45
[0.057]
2,8
[0.11]
7,11 mm ±4,3 mm
[0.28 in ±0.17 in]
311SM17-H58 44,8 mm [1.765 in] straight
lever, gold contacts
1 A
N
0,15
[0.53]
0,02
[0.07]
7,87
[0.31]
1,45
[0.057]
2,8
[0.11]
7,11 mm ±4,3 mm
[0.28 in ±0.17 in]
311SM703-T 44,8 mm [1.765 in] straight
lever, lower force
4 A
S
0,06
[0.2]
0,01
[0.04]
7,87
[0.31]
1,45
[0.057]
1,78
[0.07]
7,11 mm ±4,3 mm
[0.28 in ±0.17 in]
311SM4-T 6,38 mm [0.251 in] simulat-
ed roller lever
5 A
J
0,39
[1.4]
0,07
[0.25]
2,16
[0.085]
0,46
[0.018]
0,48
[0.019]
11,7 mm ±1,5 mm
[0.46 in ±0.06 in]
311SM25-T
6,38 mm [0.251 in] simu- lated
roller lever, gold contacts
1 A
N
0,39
[1.4]
0,07
[0.25]
2,16
[0.085]
0,46
[0.018]
0,48
[0.019]
11,7 mm ±1,5 mm
[0.46 in ±0.06 in]
311SM704-T 6,38 mm [0.251 in] simulat-
ed roller lever, lower force
4 A
S
0,16
[0.57]
0,03
[0.11]
2,16
[0.085]
0,46
[0.018]
0,33
[0.013]
11,7 mm ±1,5 mm
[0.46 in ±0.06 in]
311SM5-T 13,6 mm [0.535 in] simulat-
ed roller lever
5 A
J
0,31
[1.1]
0,05
[0.18]
3,05
[0.12]
0,66
[0.026]
0,69
[0.027]
11,56 mm ±2 mm
[0.455 in ±0.08 in]
311SM705-T 13,6 mm [0.535 in] simulat-
ed roller lever, lower force
4 A
S
0,11
[0.4]
0,02
[0.07]
3,05
[0.12]
0,66
[0.026]
0,38
[0.015]
11,56 mm ±2 mm
[0.455 in ±0.08 in]
311SM6-T 6,38 mm [0.251 in] roller
lever
5 A
J
0,39
[1.4]
0,07
[0.25]
2,16
[0.085]
0,46
[0.018]
0,48
[0.019]
14,2 mm ±1,5 mm
[0.56 in ±0.06 in]
311SM68-T 6,38 mm [0.251 in] roller
lever, gold contacts
1 A
N
0,39
[1.4]
0,07
[0.25]
2,16
[0.085]
0,46
[0.018]
0,48
[0.019]
14,2 mm ±1,5 mm
[0.56 in ±0.06 in]
311SM706-T 6,38 mm [0.251 in] roller
lever, lower force
4 A
S
0,16
[0.57]
0,03
[0.11]
2,16
[0.085]
0,46
[0.018]
0,33
[0.013]
14,2 mm ±1,5 mm
[0.56 in ±0.06 in]
311SM7-T 13,6 mm [0.535 in] roller
lever
5 A
J
0,31
[1.1]
0,05
[0.18]
3,05
[0.12]
0,66
[0.026]
0,69
[0.027]
14,1 mm ±2 mm
[0.555 in ±0.08 in]
111SM1-T Leaf actuator 5 A
J
1,95
[7]
0,56
[2]
5,54
[0.218]
0,76
[0.03]
0,76
[0.03]
8,89 mm ±0,76 mm
[0.35 in ±0.03 in]
111SM17-T Leaf actuator gold contacts 1 A
N
1,95
[7]
0,56
[2]
5,54
[0.218]
0,76
[0.03]
0,76
[0.03]
8,89 mm ±0,76 mm
[0.35 in ±0.03 in]
111SM2-T Flexible leaf with roller 5 A
J
1,95
[7]
0,56
[2]
5,56
[0.219]
0,76
[0.03]
0,64
[0.025]
14,3 mm ±0,76 mm
[0.562 in ±0.03 in]
111SM23-T Flexible leaf with roller, gold
contacts
1 A
N
1,95
[7]
0,56
[2]
5,56
[0.219]
0,76
[0.03]
0,64
[0.025]
14,3 mm ±0,76 mm
[0.562 in ±0.03 in]
Sensing and Internet of Things 5
MICRO SWITCH Premium Subminiature Basic Switches, SM Series
Table 5. Numeric Designations for MICRO SWITCH SM Series/Order Guide
Prefix Description
1SM Standard pin plunger construction, up to 80,000
operations
11SM Long-life pin plunger construction, up to
10,000,000 operations
12SM Gold bifurcated contacts
21SM Same as 1SM (formerly had DAP material)
22SM Same as 11SM (formerly had DAP material)
23SM Same as 12SM (formerly had DAP material)
41SM 11 A construction (11SM construction)
101SM 1SM with an integral leaf actuator
111SM 11SM with an integral spring leaf
112SM 12SM with an integral spring leaf
122SM 22SM with an integral spring leaf
151SM 51SM with an integral spring leaf
301SM 1SM with an integral rigid lever
302SM 1SM with an integral roller lever
311SM Integral rigid lever
321SM 21SM with an integral rigid lever
322SM 22SM with an integral rigid lever
401SM Dust/splash resistant 1SM
411SM Dust/splash resistant 11SM
412SM Dust/splash resistant 12SM
Suffix Description
23 Gold contacts
400 Low differential travel series
500 Reverse terminal designation
700 Low force series
1000 Gold alloy
6 sensing.honeywell.com
MICRO SWITCH Premium Subminiature Basic Switches, SM Series
Table 6. SM Series • Standard Actuator Options, Screw Terminals, and Dimensions (mm/in)
Pin plunger, T terminals Pin plunger, Solder terminals
Integral leaf lever Integral roller lever
Integral levers
NOTE: The two mounting holes accept pins or screws of 2,21 mm (0.087 in) maximum diameter
Mounting torque:
0,26 Nm [2.3 in-lb] max.
MICRO SWITCH SM SERIES AVAILABLE TERMINALS
Sensing and Internet of Things 7
MICRO SWITCH Premium Subminiature Basic Switches, SM Series
MICRO SWITCH JS SERIES AUXILIARY ACTUATORS FOR THE MICRO SWITCH SM SERIES SWITCH-
ES (stainless steel actuator and hardware)
Description Actuator
Length
Operting
Force
max.
Release
Force min.
Pretravel
max.
Overtravel
min.
Differential
Travel max.
Operating
Point
Free
Position
max.
JS-2
Straight leaf 16,8 mm
[0.66 in]
2,78 N
[10 oz]
0,56 N
[2 oz]
1,98 mm
[0.078 in]
0,38 mm
[0.015 in]
0,38 mm
[0.015 in]
8,89 mm
±0,38 mm
[0.350 in
±0.015 in]
11,3 mm
[0.445 in]
JS-5
Roller leaf
(bronze
roller)
15 mm
[0.59 in]
2,78 N
[10 oz]
0,83 N
[3 oz]
1,98 mm
[0.078 in]
0,38 mm
[0.015 in]
0,38 mm
[0.015 in]
14,2 mm
±0,38 mm
[0.580 in
±0.015 in
16,9 mm
[0.665 in]
JS-7
Formed leaf
(simulated
roller)
14,7 mm
[0.58 in]
2,78 N
[10 oz]
0,56 N
[2 oz]
2,39 mm
[0.094 in]
0,79 mm
[0.031 in]
0,38 mm
[0.015 in]
9,65 mm
±0,38 mm
[0.380 in
±0.015 in]
12,7 mm
[0.475 in]
JS-220
Straight lever 26,2 mm
[1.03 in]*
0,28 N
[1 oz]
0,04 N
[0.14 oz]
3,18 mm
[0.125 in]
approx.
0,76 mm
[0.030 in]
0,76 mm
[0.030 in]
10,3 mm
[0.406 in]
approx.
–
JS-246
Roller lever
(steel roller)
25,4 mm
[1.00 in]*
0,28 N
[1 oz]
0,04 N
[0.14 oz]
3,18 mm
[0.125 in]
approx.
0,76 mm
[0.030 in]
0,76 mm
[0.030 in]
14,3 mm
[0.562 in]
approx.
–
JS-221
Formed lever
(simulated
roller)
25,4 mm
[1.00 in]*
0,28 N
[1 oz]
0,04 N
[0.14 oz]
3,18 mm
[0.125 in]
approx.
0,76 mm
[0.030 in]
0,76 mm
[0.030 in]
11,6 mm
[0.455 in]
approx.
–
JS-33** D
Tandem leaf 5,3 mm
[0.21 in]
5,00 N
[18 oz]
2,78 N
[10 oz]
2,36 mm
[0.093 in]
0,15 mm
[0.006 in]
0,38 mm
[0.015 in]
8,89 mm
±0,38 mm
[0.350 in
±0.015 in]
10,5 mm
[0.415 in]
JS-31** D
Tandem
leaf (bronze
roller)
4,3 mm
[0.17 in]
11,1 N
[40 oz]
4,45 N
[16 oz]
2,36 mm
[0.093 in]
0,13 mm
[0.005 in]
0,38 mm
[0.015 in]
14,5 mm
±0,38 mm
[0.570 in
±0.015 in]
16,1 mm
[0.635 in]
** Travel characteristics on tandem actuators
vary with actual basic switch characteristics
NOTE: Above actuators should be used
below 300°F
* “A” measurement is from pivot point of
lever to the point indicated on drawing
D Plated steel machine screws
Warranty/Remedy
Honeywell warrants goods of its manufacture as being free of
defective materials and faulty workmanship during the appli-
cable warranty period. 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 that Honeywell, in its sole discretion, finds defec-
tive. 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 particular purpose. In no
event shall Honeywell be liable for consequential, special,
or indirect damages.
While Honeywell may provide application assistance personally,
through our literature and the Honeywell web site, it is buyer’s
sole responsibility 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 writing.
However, Honeywell assumes no responsibility for its use.
0049593EN IL50 GLO
December 2016
© 2016 Honeywell International Inc. All rights reserved.
m 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.
m 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.
Find out more
Honeywell serves its customers
through a worldwide network of
sales offices and distributors.
For application assistance, cur-
rent specifications, pricing or
name of the nearest Authorized
Distributor, contact your local
sales office.
To learn more about Honey-
well’s sensing and switching
products,
call +1-815-235-6847 or
1-800-537-6945,
visit sensing.honeywell.com,
or e-mail inquiries to
info.sc@honeywell.com
ADDITIONAL MATERIALS
The following associated literature is available at
sensing.honeywell.com:
• Product installation instructions
• Product range guide
• Aerospace range guide
• Applying basic switches
• Low energy switching guide
• Product application-specific information
– Application Note: Central Vacuum System
– Application Note: Electronic Taping Machine
– Application Note: Sensors and Switches in Sanitary Valves
– Application Note: Sensors and Switches in Oil Rig
Applications
– Application Note: Sensors and Switches for Potential
Medical Applications
Honeywell Sensing and Internet of Things
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