MIL-DTL-3786/2G
Dielectric withstanding voltage: The applicable test voltage specified in table III shall be applied
between the general switch elements.
TABLE III. Dielectric-test voltages.
Altitude
Test voltage
Volts, rms
At atmospheric pressure
1,000
At reduced barometric pressure
400
Mounting hardware: Each switch shall be supplied with 1 each hexagon nut in accordance with
MS25082-20 or equivalent, and one internal-tooth lockwasher in accordance with NASM35333-42 or
equivalent.
Contact resistance: For switches of life-temperature characteristics A, C, and E, the contact
resistance at room temperature shall not exceed the following values:
Initial and after vibration and shock -------------- 20 milliohms.
After moisture-resistance and salt spray -------- 30 milliohms.
After initial soak and completion of life test ----- 40 milliohms.
Vibration grade: Symbol 2 (10 to 500 Hz).
Shock type: See table IV.
Altitude: Symbol C (70,000 feet).
Part number: The military part number shall consist of M3786/2-(four letters selected from tables IV
through VII) as shown in the following example:
(AKEC identifies a rotary switch of construction type N, temperature-life characteristic B, shock type H
and M, ceramic or glass bonded mica insulation material, 36 degree angle of throw, 1 pole per deck, 5
positions, 2 decks, and nonshorting switching characteristics.)
M3786/2-
A
K
E
C
Construction type, temperature-life
characteristic and shock type
(see table IV)
Insulation material and angle of throw
(see table V)
Poles per deck and number of positions
(see table VI)
Number of decks and switching characteristics
(see table VII)
NOTE: Part numbers shall be generated only to identify switches shown on figure 2. Acquisition of
switches not identified by military part numbers shall be in accordance with the ordering data of
MIL-DTL-3786.
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