MIL-DTL-3786/20K
TABLE II. Electrical loads.
Lamp load
Resistive load
Inductive load
Environmental
(tungsten)
condition
mA
V dc
mA
V dc
mA
Volts
100
28
30
28
200
28 dc
At atmospheric
115 V rms
pressure 1/
75
60 Hz
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200
28 dc
At reduced
barometric
115 V rms
75
pressure
60 Hz
1/ The contact resistance (applicable to ac and dc), after life test, shall not exceed 50
milliohms.
Dielectric withstanding voltage: The magnitude of test voltage for the dielectric withstanding voltage
shall be 600 V ac at temperature pressure and 250 V ac at reduced pressure.
Test procedure on lamp load at atmospheric: The test procedure on lamp at atmospheric pressure
shall be as follows:
Test potential and load: One pole on four switches, each for atmospheric and at reduced barometric
pressure, shall be energized by the specified lamp load. A common terminal and one selected terminal
shall be arranged to be "on" once per cycle. The next selected terminal shall be unloaded. Suitable
means shall be provided to indicate when contacts have failed to make and break.
Ordering data: Acquisition documents should specify the following:
a. Title, number, and date of this specification sheet, and the military PIN as listed in table III,
example A, or table IV, table V, and table VI, example B.
b. For switches not listed in table III, table IV, table V, and table VI, acquisition shall be in
accordance with the ordering data of MIL-DTL-3786 (for switches covered by specification sheets
but not by military PIN's).
c.
Switches covered are style SR20 units.
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