MIL-DTL-3786/13G
REQUIREMENTS:
Dimensions and configuration: See figure. Angle "A" is 15° for switches of 30° and 45° angle of throw;
36° for switches of 36° angle of throw.
Angle of throw and maximum number of poles per deck:
30 degrees: 6 poles
36 degrees: 2 poles
45 degrees: 2 poles
Insulation material: Symbol P.
Construction style: See table IV.
Temperature life characteristics: See table IV.
Vibration grade: Symbol 3 (10 to 2,000 Hz).
Shock type: Symbol H (high impact) and
M medium impact.
Altitude: Symbol C (70,000 ft.)
Mounting hardware: Each switch shall be provided with two hexagon nuts, unless otherwise specified,
0.312 ± 0.010 inch across flats and 0.062 ± 0.010-inch thick; one internal tooth lockwasher .415 max.
OD.
Terminals: Terminals shall be designed so that the terminals can accommodate a wire having a
diameter of 0.030 inch. The terminals shall project in a direction parallel to the place of the switch
section.
Moisture resistance: Insulation resistance, measured immediately after conclusion of the moisture
resistance test, and while the switches are still in the humidity chamber, shall be greater than 0.5
megohm. At the end of the drying period, the insulation resistance shall not be less than 10 megohms.
Stop strength: Switches shall have a stop strength of 12 pound-inches minimum.
Rotational torque: The minimum and maximum values of torque determined for shaft rotation shall be
within the limits specified in table I.
Terminal strength (pull): A force of 2 pounds minimum shall be applied to the terminals.
TABLE I. Rotational torque limits.
Temperature
Torque (lb-in)
Total number of
switch poles
Minimum
Maximum
Less than 4
Room
.32
1.7
Minimum
.32
2.2
4 thru 8
Room
.4
2.7
Minimum
.4
3.2
More than 8
Room
.5
3.5
Minimum
.5
4.0
Life (rotational): The test loads for the applicable circuit conditions shall be as specified in table II.
Each of the loads, specified for the applicable environmental condition shall be switched by at least one
rotor contact of the switch.
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