MIL-PRF-55681/6A
REQUIREMENTS:
Dimensions and configuration: See figure 1.
Capacitance value: See table I.
Capacitance tolerance: F = ±1 percent; G = ±2 percent; J = ±5 percent; K = ±10 percent; M = ±20 percent. See
table I.
Rated voltage: See table I.
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Operating temperature range: -55 C to +125 C.
Product level: Non-established Reliability - C; Established Reliability - M, P, R, and S.
Marking: In accordance with MIL-PRF-55681.
Voltage conditioning: In accordance with MIL-PRF-55681 except that 100 percent of rated voltage shall be
applied to the unit at the maximum rated temperature +4 C, -0 C for 100 ±4 hours.
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Insulation resistance: In accordance with MIL-PRF-55681 except that for the test conditions, 500 volts shall be
applied through a resistor sufficient to limit the charging current to a maximum of 30 mA.
Dielectric withstanding voltage: In accordance with method 301 of MIL-STD-202. The following details and
exceptions shall apply:
a.
150 percent of dc rated voltage shall be applied for 1,000 volts, and 120 percent of dc rated voltage shall
be applied for 2,000 volts or higher. It is recommended that the capacitors be immersed in an inert
medium to prevent arcing or higher leakage currents.
b.
Duration of application of test voltage: 1 second minimum. The test voltage shall be raised from zero to
the specified value within 1 minute maximum.
c.
Points of application of test voltage: Between the capacitor terminals.
d.
Limiting value of surge current: 10 mA maximum.
e.
Examination after test: Capacitors shall be examined for evidence of damage and breakdown.
Voltage-temperature limits: In accordance with MIL-PRF-55681 except that for capacitors with the BZ rated
temperature and voltage temperature limits, 60 percent of rated voltage shall be applied in steps E through G of
the voltage-temperature limit cycle table. Capacitors shall be kept at each temperature until temperature
equilibrium is attained.
Life: In accordance with MIL-PRF-55681 except that for the operating conditions, capacitors shall be subjected
to 100 percent of rated voltage. The surge current shall not exceed 50 mA. When necessary, a suitable current-
limiting resistor shall be inserted into the current.
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