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)
SM SERIES
MICRO SWITCH Premium Subminiature Basic Switches
004959
Issue 4
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
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.
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
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