MIL-DTL-3786/28E
REQUIREMENTS:
Dimensions and configuration: See figures 1 through 3.
Angle of throw: 30 degrees.
Terminals: The terminal tabs shall extend from the section in a plane perpendicular to the axis of the
switch.
Construction type: Symbol E. Explosion proof, totally closed construction, without sealed shaft and
panel seal.
Symbol F. Same as E with sealed shaft and panel seal.
Insulation material: Symbol P: Plastic
Temperature-life characteristic: Symbol C. 25,000 cycles -65°C to +125°C.
Altitude: Symbol C. Up to 70,000 ft.
Contact resistance:
Initial and after vibration and shock: 10 milliohms, maximum.
After moisture-resistance and salt spray: 10 milliohms, maximum.
After initial soak and completion of life test: 15 milliohms, maximum
During thermal shock: 1 ohm maximum.
Low level circuit is applicable.
Rotational torque: See table I.
Vibration grade: Symbol 3. 10-2,000 Hz.
Shock type: Symbol M (medium impact) and H (high impact).
Dielectric withstanding voltage:
At atmospheric pressure: 1,000 V rms.
At reduced barometric pressure: 450 V rms, except 350 V rms after life.
Life (rotational): See table II.
Low level switching: Applicable; see note 2 of table II.
Special features: Symbol A. Both shaft grounding and EMI/RFI capability, and both high and low level
contact load rating.
Mounting hardware: Each switch shall supplied with one each hexagon nut in accordance with
MS25082-B20 or equivalent, and one internal-tooth lockwasher in accordance with NASM35333-76 or
equivalent.
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