MIL-DTL-13735G
3.4.2 Mechanical.
3.4.2.1 Withstanding force. Unless otherwise specified on the applicable MS or drawing, the switch shall withstand
a force of 25 pounds in all actuating directions without damage (see 4.8.6).
3.4.2.1.1 Connector or terminal strength. Connectors or terminals shall withstand a force of 25 pounds without
deformation (see 4.8.6.1).
3.4.2.2 Average operating force. The average force required to actuate the switch shall be in accordance with
applicable MS standard or drawing except as specified in 3.5.5 (for low temperature). If no operating force is
specified, the average operating force shall be .75 to 3 pounds for maintained positions and 2 to 3.5 pounds for
momentary positions. Momentary position, on release, shall be self-canceling. The average time required for the
switch to return from a momentary contact shall be no more than 1 second (see 4.8.7).
3.5 Environmental.
3.5.1 Corrosion. Switch performance shall not be adversely affected by corrosion when exposed to 5 percent salt
water spray for 144 hours (see 4.8.8).
3.5.2 Fungus. Switch performance shall not be adversely affected by fungus when subjected to the fungus
3.5.3 Sand and dust. Grade 2 switches shall not be adversely affected by sand and dust when subjected to test
3.5.4 Waterproofness. Grade 1 switch performance shall not be affected after submersion, nor shall the switch
show signs of leakage during submersion (see 4.8.11).
3.5.5 Extreme temperature. Switches shall operate in a temperature range of -67 ±2 degrees Fahrenheit (°F)
[-55 ±1 degree Celsius (°C)] through 170 ±2°F (77 ±1°C). The material used in the switch body shall not shrink,
crack, become brittle or soften. While at -67 ±2°F (-55 ±1°C), the force required to move the switch from any position
to any adjacent position shall be no more than 140 percent of the average operating force previously determined at
room temperature (see 4.8 12).
3.5.6 Shock. Switch performance shall not be adversely affected after being subjected to mechanical shocks of 75
gravity units (g) (peak) of sawtooth waveform in both directions along each of the three major axes. There shall be no
spurious opening or closing of circuits during the shock application (see 4.8.13).
3.5.7 Vibration. Switches shall be subjected to vibration testing under electric-load conditions for not less than 1
hour in each of three perpendicular axes. Vibration shall not cause spurious opening or closing of contacts, loosening
of parts, noise, wear, or physical distortion to mechanical parts (see 4.8.14).
3.5.8 Endurance. The switch shall evidence no mechanical or electrical failure during or after 10,000 operations
while connected to rated resistive and inductive loads (see 4.8.15).
3.6 Marking. In addition to any special marking specified on the applicable MS standard or drawing, switches shall
3.7 Workmanship. Workmanship shall be of the quality to assure a product free of burrs, rust, scratches, chips,
sharp edges, loose or defective connectors, cracked insulation, faulty soldering, or other defects which affect
serviceability or appearance (see 4.8.2).
4
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business