MIL-PRF-83421 Capacitors, Fixed, Metallized, Plastic Film Dielectric, \(Dc, Ac, Or Dc And Ac\), Hermetically Sealed In Metal Cases Or Ceramic Cases, Established Reliability, General Specification ForThis specification covers the general requirements for established reliability \(ER\), metallized plastic film dielectric, fixed capacitors, hermetically sealed in metal or ceramic cases. Capacitors covered by this specification have failure rate levels \(FRL\) established in accordance with MIL-STD-690. The reliability for each level is identified by a symbol in accordance with table I. These FRLs are established at a 90 percent confidence level and maintained at a 10 percent producer\'s risk and, unless otherwise specified \(see 3.1\), are based on life tests performed at maximum rated voltage at maximum rated temperature. Unless otherwise specified \(see 3.1\), an acceleration factor of 5:1 has been used to relate life-test data obtained at 140 percent of rated voltage at maximum rated temperature, to rated voltage at maximum rated temperature \(see 6.1\). A part per million \(PPM\) quality system is used for documenting and reporting the average outgoing quality of capacitors supplied to this specification. Statistical process control \(SPC\) techniques are required in the manufacturing process to minimize variation in production of capacitors supplied to the requirements of this specification.

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MIL-PRF-83421E

APPENDIX A

PROCEDURE FOR QUALIFICATION INSPECTION

A.1 SCOPE

A.1.1 Scope. 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 APPLICABLE DOCUMENTS

A.2.1 General. The documents listed in this section are specified in sections 3 and 4 of this specification. This

section does not include documents cited in other sections of this specification or recommended for additional

information or as examples. While every effort has been made to ensure the completeness of this list, document

users are cautioned that they must meet all specified requirements of documents cited in sections 3 and 4 of this

specification, whether or not they are listed.

A.2.2 Government documents.

A.2.2.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a

part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are

those cited in the solicitation or contract.

DEPARTMENT OF DEFENSE STANDARDS

Leads for Electronic Component Parts.

(Copies of these documents are available online at https://assist.daps.dla.mil/quicksearch or from the

Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.)

A.2.3 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a conflict between the

text of this document and the references cited herein (except for related specification sheets), the text of this

document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless

a specific exemption has been obtained.

A.3 SUBMISSION

A.3.1 Sample. For qualification to "M" level (see 3.1) as in accordance with table II.

A.3.1.1 Single type submission. A sample consisting of 89 1/ 2/ sample units of the same style, dielectric

material, rated voltage, capacitance value, and capacitance tolerance for which qualification is sought shall be

submitted.

A.3.1.2 Single style submission. A sample consisting of 45 2/ 3/ sample units of the highest capacitance value in

the smallest case size and 45 2/ 3/ sample units of the highest capacitance value in the largest case size, within a

single style, shall be submitted. The dielectric material and FRL of the sample units shall be the same.

A.3.1.3 Complete qualification group submission. The types and number of samples which shall be submitted for

qualification approval are those shown in table A-I and shall be grouped in accordance with that table.

1/ For styles CRH11, CRH12 and CRH13, 113 sample units.

2/ This total shall be determined by the number of capacitors tested for random vibration in group X.

3/ For styles CRH11, CRH12 and CRH13, 57 sample units.