MICRO SWITCH Premium Subminiature Basic Switches
SM Series
004959
Datasheet
Issue 3
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
DESCRIPTION
VALUE TO CUSTOMERS
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).
• 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
DIFFERENTIATION
• 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)
• 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
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.
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MICRO SWITCH Premium Subminiature Basic Switches, SM Series
Table 1. Specifications
Characteristic
Differentiator
Ampere rating
Circuitry
Operating force
Termination
Actuator
Voltage
Agency approvals
Agency file information
Operating temperature
Contacts
Housing
Sealing
Mechanical life
Size
Parameter
low operating force to 2 oz. max; power load switching capability to 11 A; motor load handling capacity to 1/4
HP (Vac)
0.1 A to 11 A
SPDT
0.04 oz to 2 oz
quick connect, solder, pcb
pin plunger, straight lever, roller lever, simulated roller lever, paddle lever
115 Vac, 125 Vac, 250 Vac, 30 Vdc
UL, CE, CSA, ENEC, MIL-PRF-8805, FAA-PMA
CE: 61058-1; UL: E12252; CSA: LR41372
-54°C to 121°C [-65°F to 250°F]; select catalog listings 204°C [400°F]
silver, gold plated, bifurcated gold
phenolic
sealed plunger on 411SM Series, other SM Series not weather sealed
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
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
J
K
M
N
P
R
S
Circuitry
SPDT
SPDT
SPDT
SPDT
SPDT
SPDT
SPDT
Electrical data and UL codes
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
UL rating: 5 A, 125 or 250 Vac
UL rating: 11 A and 1/4 hp, 125 or 250 Vac
1 A res., 0.5 A ind., 30 Vdc. UL rating: 1 A, 125 Vac
1 A res., 30 Vdc. UL rating: .1 A, 125 Vac
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)
UL rating: 4 A, 250 Vac
2
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MICRO SWITCH Premium Subminiature Basic Switches, SM Series
O.F.
R.F.
P.T.
O.T.
D.T.
O.P.
•
•
•
•
•
•
Operating force
Release force
Pretravel
Overtravel
Differential travel
Operating position
Table 3. MICRO SWITCH SM Series Order Guide • Pin Plunger
Catalog
Listing
Electrical
Data and UL
Codes
O.F.
N [oz]
0,83 to 1,39
[3 to 5]
0,83 to 1,39
[3 to 5]
0,83 to 1,39
[3 to 5]
0,83 to 1,39
[3 to 5]
0,56 [2]
0,83 to 1,39
[3 to 5]
0,83 to 1,39
[3 to 5]
0,83 to 1,39
[3 to 5]
0,97 [3.5]
max.
0,83 to 1,39
[3 to 5]
0,83 to 1,39
[3 to 5]
0,83 to 1,39
[3 to 5]
0,83 to 1,39
[3 to 5]
0,83 to 2,09
[3 to 7.5]
0,83 to 2,09
[3 to 7.5]
Recommended For
R.F. min.
N [ oz]
P.T. max.
mm [in]
0,51
[0.020]
0,51
[0.020]
0,51
[0.020]
0,51
[0.020]
0,51
[0.020]
0,51
[0.020]
0,51
[0.020]
0,51
[0.020]
0,51
[0.020]
0,76
[0.030]
0,76
[0.030]
0,51
[0.020]
0,76
[0.030]
0,51
[0.020]
0,51
[0.020]
O.T. min.
mm [in]
0,13
[0.005]
0,076
[0.003]
0,13
[0.005]
0,076
[0.003]
0,13
[0.005]
0,13
[0.005]
0,13
[0.005]
0,13
[0.005]
0,13
[0.005]
0,13
[0.005]
0,13
[0.005]
0,13
[0.005]
0,13
[0.005]
0,13
[0.005]
0,13
[0.005]
D.T.
mm [in]
O.P. *
mm [in]
8,38
[0.330]
8,38
[0.330]
8,38
[0.330]
8,38
[0.330]
8,38
[0.330]
8,38
[0.330]
8,38
[0.330]
8,38
[0.330]
8,38
[0.330]
8,38
[0.330]
8,38
[0.330]
8,38
[0.330]
8,38
[0.330]
8,38
[0.330]
8,38
[0.330]
11SM1077-T
12SM604
-T
11SM23
-T
Gold-plated contacts
Bifurcated gold contacts,
reduced rating
Gold-plated contacts
Enhanced reliability
(bifurcated gold contacts)
Lower force
General purpose
Operating temps to 121°C
[250°F]
Operating temps to 204°C
[400°F] for 100 hours
Less differential travel
MIL-PRF-8805
applications
MIL-PRF-8805
applications, solder
terminals
Enhanced stability under
varying humidity
Up to 11 A, 1/4 HP (ac)
Sealed plunger construction
Sealed plunger construc-
tion, gold contacts
0.1 A
P
0.1 A
P
1A
N
1A
N
4A
S
5A
J
5A
J
5A
5A
K
5A
R
5A
R
5A
J
11 A
M
5A
K
1A
N
0,28 [1]
0,28 [1]
0,28 [1]
0,28 [1]
0,14 [0.5]
0,28 [1]
0,28 [1]
0,28 [1]
0,28 [1]
0,28 [1]
0,1 [0.004]
0,1 [0.004]
0,1 [0.004]
0,1 [0.004]
0,051
[0.002]
0,1 [0.004]
0,1 [0.004]
0,1 [0.004]
0,025
[0.001]
0,1 [0.004]
12SM4-T
11SM701-T
11SM1-T
11SM3-T
11SM244-T
11SM401-T
21SM284-T2
(MS25085-2)
21SM284
(MS25085-1)
22SM1-T
41SM1-T
411SM1
411SM23
0,28 [1]
0,28 [1]
0,28 [1]
0,28 [1]
0,28 [1]
0,1 [0.004]
0,1 [0.004]
0,1 [0.004]
0,1 [0.004]
0,1 [0.004]
* except where stated ±0,38 mm [±0.015 in]
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3
MICRO SWITCH Premium Subminiature Basic Switches, SM Series
O.F.
R.F.
P.T.
O.T.
D.T.
O.P.
•
•
•
•
•
•
Operating force
Release force
Pretravel
Overtravel
Differential travel
Operating position
Table 4. MICRO SWITCH SM Series Order Guide • Integral Lever
Electrical
Data and
UL Codes
Catalog
Listing
O.F.
N [oz]
0,39
[1.4]
0,39
[1.4]
0,16
[0.57]
0,31
[1.1]
0,31
[1.1]
0,11
[0.4]
0,15
[0.53]
0,15
[0.53]
0,06
[0.2]
0,39
[1.4]
0,39
[1.4]
0,16
[0.57]
0,31
[1.1]
0,11
[0.4]
0,39
[1.4]
0,39
[1.4]
0,16
[0.57]
0,31
[1.1]
1,95
[7]
1,95
[7]
1,95
[7]
1,95
[7]
Recommended For
R.F.
min.
N [ oz]
0,07
[0.25]
0,07
[0.25]
0,03
[0.11]
0,05
[0.18]
0,05
[0.18]
0,02
[0.07]
0,02
[0.07]
0,02
[0.07]
0,01
[0.04]
0,07
[0.25]
0,07
[0.25]
0,03
[0.11]
0,05
[0.18]
0,02
[0.07]
0,07
[0.25]
0,07
[0.25]
0,03
[0.11]
0,05
[0.18]
0,56
[2]
0,56
[2]
0,56
[2]
0,56
[2]
P.T. max.
mm [in]
2,16
[0.085]
2,16
[0.085]
2,16
[0.085]
3,05
[0.12]
3,05
[0.12]
3,05
[0.12]
7,87
[0.31]
7,87
[0.31]
7,87
[0.31]
2,16
[0.085]
2,16
[0.085]
2,16
[0.085]
3,05
[0.12]
3,05
[0.12]
2,16
[0.085]
2,16
[0.085]
2,16
[0.085]
3,05
[0.12]
5,54
[0.218]
5,54
[0.218]
5,56
[0.219]
5,56
[0.219]
O.T. min.
mm [in]
0,51
[0.020]
0,51
[0.020]
0,51
[0.020]
0,66
[0.026]
0,66
[0.026]
0,66
[0.026]
1,45
[0.057]
1,45
[0.057]
1,45
[0.057]
0,46
[0.018]
0,46
[0.018]
0,46
[0.018]
0,66
[0.026]
0,66
[0.026]
0,46
[0.018]
0,46
[0.018]
0,46
[0.018]
0,66
[0.026]
0,76
[0.03]
0,76
[0.03]
0,76
[0.03]
0,76
[0.03]
D.T.
mm [in]
0,48
[0.019]
0,48
[0.019]
0,36
[0.014]
0,69
[0.027]
0,69
[0.027]
0,38
[0.015]
2,8
[0.11]
2,8
[0.11]
1,78
[0.07]
0,48
[0.019]
0,48
[0.019]
0,33
[0.013]
0,69
[0.027]
0,38
[0.015]
0,48
[0.019]
0,48
[0.019]
0,33
[0.013]
0,69
[0.027]
0,76
[0.03]
0,76
[0.03]
0,64
[0.025]
0,64
[0.025]
O.P. *
mm [in]
8,64 mm ±1,5 mm
[0.34 in ±0.060 in]
8,64 mm ±1,5 mm
[0.34 in ±0.060 in]
8,64 mm ±1,5 mm
[0.34 in ±0.060 in]
8,51 mm ±2 mm
[0.335 in ±0.08 in]
8,51 mm ±2 mm
[0.335 in ±0.08 in]
8,51 mm ±2 mm
[0.335 in ±0.08 in]
7,11 mm ±4,3 mm
[0.28 in ±0.17 in]
7,11 mm ±4,3 mm
[0.28 in ±0.17 in]
7,11 mm ±4,3 mm
[0.28 in ±0.17 in]
11,7 mm ±1,5 mm
[0.46 in ±0.06 in]
11,7 mm ±1,5 mm
[0.46 in ±0.06 in]
11,7 mm ±1,5 mm
[0.46 in ±0.06 in]
11,56 mm ±2 mm
[0.455 in ±0.08 in]
11,56 mm ±2 mm
[0.455 in ±0.08 in]
14,2 mm ±1,5 mm
[0.56 in ±0.06 in]
14,2 mm ±1,5 mm
[0.56 in ±0.06 in]
14,2 mm ±1,5 mm
[0.56 in ±0.06 in]
14,1 mm ±2 mm
[0.555 in ±0.08 in]
8,89 mm ±0,76 mm
[0.35 in ±0.03 in]
8,89 mm ±0,76 mm
[0.35 in ±0.03 in]
14,3 mm ±0,76 mm
[0.562 in ±0.03 in]
14,3 mm ±0,76 mm
[0.562 in ±0.03 in]
311SM1-T
311SM23-T
311SM701-T
311SM2-T
311SM43-T
311SM702-T
311SM3-T
311SM17-H58
311SM703-T
311SM4-T
311SM25-T
311SM704-T
311SM5-T
311SM705-T
311SM6-T
311SM68-T
311SM706-T
7,24 mm [0.285 in] straight
lever
7,24 mm [0.285 in] straight
lever, gold contacts
7,24 mm [0.285 in] straight
lever, lower force
14,35 mm [0.565 in] straight
lever
14,35 mm [0.565 in] straight
lever, gold contacts
14,35 mm [0.565 in] straight
lever, lower force
44,8 mm [1.765 in] straight
lever
44,8 mm [1.765 in] straight
lever, gold contacts
44,8 mm [1.765 in] straight
lever, lower force
6,38 mm [0.251 in] simulat-
ed roller lever
6,38 mm [0.251 in] simu- lated
roller lever, gold contacts
6,38 mm [0.251 in] simulat-
ed roller lever, lower force
13,6 mm [0.535 in] simulat-
ed roller lever
13,6 mm [0.535 in] simulat-
ed roller lever, lower force
6,38 mm [0.251 in] roller
lever
6,38 mm [0.251 in] roller
lever, gold contacts
6,38 mm [0.251 in] roller
lever, lower force
13,6 mm [0.535 in] roller
lever
Leaf actuator
Leaf actuator gold contacts
5A
J
1A
N
4A
S
5A
J
1A
N
4A
S
5A
J
1A
N
4A
S
5A
J
1A
N
4A
S
5A
J
4A
S
5A
J
1A
N
4A
S
5A
J
5A
J
1A
N
5A
J
1A
N
311SM7-T
111SM1-T
111SM17-T
111SM2-T
Flexible leaf with roller
Flexible leaf with roller, gold
contacts
111SM23-T
4
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MICRO SWITCH Premium Subminiature Basic Switches, SM Series
Table 5. Numeric Designations for MICRO SWITCH SM Series/Order Guide
Prefix
Description
Suffix
Description
1SM
11SM
12SM
21SM
22SM
23SM
41SM
101SM
111SM
112SM
122SM
151SM
301SM
302SM
311SM
321SM
322SM
401SM
411SM
412SM
Standard pin plunger construction, up to 80,000
operations
Long-life pin plunger construction, up to
10,000,000 operations
Gold bifurcated contacts
Same as 1SM (formerly had DAP material)
Same as 11SM (formerly had DAP material)
Same as 12SM (formerly had DAP material)
11 A construction (11SM construction)
1SM with an integral leaf actuator
11SM with an integral spring leaf
12SM with an integral spring leaf
22SM with an integral spring leaf
51SM with an integral spring leaf
1SM with an integral rigid lever
1SM with an integral roller lever
Integral rigid lever
21SM with an integral rigid lever
22SM with an integral rigid lever
Dust/splash resistant 1SM
Dust/splash resistant 11SM
Dust/splash resistant 12SM
23
400
500
700
1000
Gold contacts
Low differential travel series
Reverse terminal designation
Low force series
Gold alloy
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