MIL-C-25F
APPENDIX A
PROCEDURE FOR QUALIFICATION INSPECTION
A.1. SCOPE
A.1.1 This appendix details the procedure for submission of samples for qualification inspection of capacitors
covered by this specification. The procedure for extending qualification of the required sample to other capacitors
covered by this specification is also outlined herein. This appendix is a mandatory part of the specification. The
information contained herein is intended for compliance.
A.2. SUBMISSION
A.2.1 Sample.
A.2.1.1 Single-type-capacitor submission. A sample consisting of 27 specimens of each type for which
qualification is sought shall be submitted (see A.3.1).
A.2.1.2 Combined capacitor submission (see A.3.2). A maximum of two types of capacitors, 14 specimens of
each type within a style group, may be represented in a combined submission. Styles are grouped as specified in
table A-I. Both types shall have the same impregnant or filling compound. In view of the relatively few specimens of
each type or design represented, a combined submission will be treated similarly to a single-type submission, and the
failure of one type or design will disqualify the entire submission. However, when two or more combined submissions
of the same capacitor type have been made, and these combined submissions were disqualified in each instance
because of failures of the same capacitor type, the results of the tests on the other types may be combined and
treated as a single-type submission, provided that:
a. The combined-test results show compliance with specification requirements and the correct number of
specimens were tested.
b. The capacitors are of the identical types or of the same type except for characteristic (the same impregnant or
filling compound shall be used for both characteristics), and that no design changes were made in the interval
between the two submissions.
c. Qualification is considered only for the less stringent characteristic when capacitors were tested in accordance
with the requirements for two different characteristics.
d. The combined results are from tests conducted within 6 months of each other.
TABLE A-I. Style groups.
Style group 1/
Styles
D
CP53, CP54, CP55
A.2.1.2.1 Watt-second groups. Two adjacent watt-second groups may be represented. The maximum watt-
second rating in the highest voltage shall be submitted in each watt-second group for which qualification is sought.
For determination of the watt-second group into which any capacitor falls, the watt-second rating shall be computed
on the basis of nominal capacitance and voltage values.
A.2.1.2.2 Design and construction. Two designs or constructions may be represented.
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