MIL-C-18312/3D
Life:
Qualification: Test voltage 140 percent of rated voltage, 1,000 hours at high ambient temperature.
Conformance - 250 hours at conditions specified for 1,000-hour test.
Dissipation factor:
At high ambient test temperature (any time 24 to 48 hours from start of test): Not greater than 2.0 percent.
At high ambient test temperature (any time during last 48 hours of test): Not greater than 2.5 percent.
At +25°C (after life test): Not greater than 1.25 percent.
Capacitance: At +25°C (after life test): Within 10 percent of initial value.
Insulation resistance: At +25°C (after life test).
Terminal to terminal: Not less than 1/3 of value specified in table III.
Terminal to case (case not a terminal): Not less than 5,000 megohms.
Supersession information: See table I.
TABLE III. Characteristic.
-55 to +125°C
Operating temperature range
DC voltage rating (volts)
200
400, 600
+125°C
+125°C
High ambient test temperature
-55°C
-55° C
Low ambient test temperature
Megohms x microfarads:
At +25°C
2,000 min
2,000 min
At high ambient test temperature
10 min
40 min
Insulation resistance (megohms):
At +25°C 1/
12,000
12,000
At high ambient test temperature 1/
150
600
Capacitance change at low temperature
-15% max
-15% max
Life test voltage (% rated voltage)
140 %
140 %
1/ Need not exceed.
Changes from previous issue. The margins of this specification are marked with vertical lines to indicate where
changes from the previous issue were made. This was done as a convenience only and the Government assumes
no liability whatsoever for any inaccuracies in these notations. Bidders and contractors are cautioned to evaluate the
requirements of this document based on the entire content irrespective of the marginal notations and relationship to
the last previous issue.
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