MIL-DTL-3950J
FIGURE 4. Stored energy (joules vs current) Type I inductors only.
4.8.11.4 Lamp-load (dc and ac). Switches shall be subjected to 20,000 operating cycles when wired
into a circuit having rated steady state lamp-load current at the applicable rated voltage. For ac
lamp-loads, only tungsten filament lamps having a wattage not exceeding 200 watts at the specified
voltage shall be used to make up the load. For dc lamp-loads only tungsten filament lamps having a
wattage rating up to 50 watts at the specified voltage shall be used to make up the load. A minimum
cooling period of 15 seconds shall be allowed between successive operations of the lamps. At the option
of the manufacturer, a synthetic lamp-load may be used for this test. The synthetic lamp-load shall
consist of making ten times the rated lamp-load and breaking the rated lamp-load. The duration of the
ten times inrush shall be .015 second minimum.
4.8.11.5 Intermediate current. Switches shall be subjected to 20,000 operating cycles of making and
breaking a 35 milliamperes to 40 milliamperes resistive load at the lowest rated dc voltage in an ambient
temperature of 71°C(-0°C, +4°C). Multipole switches shall be subjected to this test with alternate poles
making and breaking the rated resistive load at the lowest dc voltage.
4.8.11.6 Life, low level. When specified (see 3.1), switches shall be tested in accordance with method
311 of MIL-STD-202. The following details and exceptions shall apply:
a. Number of "misses" allowed - None.
b. Maximum contact resistance - 3 ohms.
c.
Number of cycles and cycling rate - 40,000 cycles at the rate of 10 cpm to 18 cpm. At the
manufacturer's option, a faster rate of cycling (up to 60 cpm) may be used.
d. The conditions of figure 2 do not apply.
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