MIL-DTL-3786/28E
TABLE I. Rotational-torque limits. 1/
Torque (lb-in)
Total number of
Temperature
switch poles
Minimum
Maximum
Room
.5
2.5
Less than 4
Minimum
.5
3.5
Room
1.2
4.5
4 thru 8
Minimum
1.2
6.0
Room
2.5
7.5
More than 8
Minimum
2.5
9.0
1/ The rotational torque shall not change more than 40 percent
from the initial value after rotational life testing.
TABLE II. Electrical loads.
Inductive loads
(2.8 H)
Resistive loads 1/
Environmental condition
mA
V dc
mA
V dc
Elevated temperature
10 max 2/
0.030 dc
125°C:
100
28
750
max or
peak ac 2/
250
At atmospheric pressure
28 dc
115 ac
Room temperature
(25°C)
100 3/
28 3/
1000 4/
28 dc 4/
350 4/
115 ac 4/
At atmospheric pressure
At reduced barometric
40
28
250
28 dc
pressure 25°C
40
115 ac
1/ Each of the loads specified shall be switched by at least one rotor of the switch.
2/ Low level switching is applicable. Low level shall be conducted as one of the electrical loads
tested during life (rotational) testing. The test circuit, power source, and monitoring apparatus
shall be in accordance with method 311 of MIL-STD-202. Contact resistance shall not exceed 7.5
milliohms. At the beginning of the test and every 5,000 cycles thereafter, the contact resistance
shall be measured.
3/ Reference only.
4/ Two sample units shall be tested using the load specified. Testing shall be performed the same
as for other loads at atmospheric pressure, except the ambient temperature shall be room
temperature.
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