MIL-C-18312/2D
Case material: Nonmagnetic (end seals may be of magnetic material).
Capacitance value: See table I.
Capacitance tolerance: See table I.
DC rated voltage: See table I.
Seal: Method 112 of MIL-STD-202, condition A. Liquid-filled capacitors: One hour at applicable high ambient
temperature ±3°C with no evidence of leakage.
Dielectric withstanding voltage: Method 301 of MIL-STD-202.
Terminal to terminal: 200 percent of rated dc voltage.
Terminal to case (where case not a terminal): 200 percent of rated dc voltage.
Dissipation factor:
At ±25°C: 1.0 percent.
At high test temperature: 2.0 percent.
Insulation resistance:
Terminal to terminal: See table III.
Terminal to case (case not a terminal): 10,000 megohms.
Barometric pressure: Method 105 of MIL-STD-202. Test condition: .82 inches of mercury (80,000 ft).
Vibration, low frequency: Method 204 of MIL-STD-202, condition B.
Thermal shock: Method 107 of MIL-STD-202, condition A, except the high temperature shall be +125°C for
capacitors rated at 200, 400, and 600 volts dc.
Immersion: Method 104 of MIL-STD-202, condition C.
Insulation resistance:
Terminal to terminal: Not less than 1/3 the value specified in table III.
Terminal to case (case not a terminal): 5,000 megohms, minimum.
Dielectric withstanding voltage:
Insulating sleeve: 4,000 volts minimum.
Terminal to terminal: 150 percent of rated dc voltage.
Terminal to case (case not a terminal): 200 percent of rated dc voltage.
Capacitance change: Not to exceed 10 percent of initial value.
Dissipation factor: Not to exceed 110 percent of initial requirement.
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