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|  MIL-C-18312F
3.17 Terminal strength. When tested as specified in 4.7.14, there shall be no permanent damage to the
terminals, terminal bushings, or seals.
3.18 Low temperature and capacitance change with temperature. When tested as specified in 4.7.15, capacitors
shall withstand the applications of rated voltage without flashover. The capacitance change at the low ambient
temperature shall be not more than the applicable value specified (see 3.1) from the initial value specified herein,
when measured in accordance with 4.7.4.
3.19 Life. When tested as specified in 4.7.16, capacitors shall meet the following requirements:
a. Visual examination. There shall be no leakage of impregnant or filling compound or evidence of corrosion
or damage either during or after the test.
b. Dissipation factor.
At the applicable high test temperature,
Not less than 4,000 volts dc.
after 24 hours but not more than 48
(see 3.1) for the applicable high
hours from start of test. ...................................................
test temperature.
At the applicable high test temperature,
Not greater than the value specified
any time during the last 48 hours of test. ........................
(see 3.1) for the applicable high
temperature.
At +25C, after life test........................................................
Not greater than the value specified
(see 3.1).
c. Capacitance.
At +25C, after life test........................................................
Capacitance value shall be within the
value specified (see 3.1) when
measured as specified in 4.7.4.
d. Insulation resistance.
At +25C, after life test:
Terminal to terminal ........................................................
Not less than the value specified
(see 3.1).
Terminal to case (where the case ...................................
Not less than the value specified
is not a terminal)
(see 3.1).
3.20 Flashpoint of impregnant. When tested as specified in 4.7.17, the flash point of impregnant shall be not
lower than 145C (293F) (see 6.6.3).
3.21 Marking. The capacitor shall be permanently and legibly marked with the PIN and the manufacturer's name
or symbol. If space permits, the capacitance in microfarads and rated voltage shall also be marked. Labels shall not
be used. The marking shall remain legible after all tests specified herein. There shall be no space between the
symbols that comprise the type designation. Marking shall be on the metal cases and not on the sleeving material.
If necessary, the type designation may appear on two lines. In this event, the type designation shall be divided as
shown in the following example:
CH09A1
NF225M
3.21.1 Date code. The date code shall be in accordance with MIL-STD-1285.
3.21.2 CH09 and CH12 style marking only. An established reliability (ER) part manufactured in accordance with
MIL-PRF-39022 may be marked and furnished as a non-ER part, if produced on the same assembly line or lines,
and provided it is subjected to and meets all the inspection requirements of the ER part.
3.22 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally
preferable materials should be used to the maximum extent possible provided that the material meets or exceeds the
operational and maintenance requirements, and promotes economically advantageous life cycle costs.
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