scope:

This specification covers the general requirements for established reliability (ER), direct and alternating current (dc and ac), metallized paper-plastic film, or plastic film dielectric, fixed capacitors, hermetically sealed 1/ in metal cases. Capacitors covered by this specification have failure rate (FR) levels established in accordance with MIL-STD-690. The reliability for each level is identified by a symbol in accordance with table I. These FR levels are established at a 90 percent confidence level and maintained at a 10 percent producer's risk unless otherwise specified (see 3.1) and 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 rated temperature (see 6.5). 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. TABLE I. FR level (established at a 90 percent confidence level).

Symbol FR level ------------------------------------------------ Percent/ 1,000 hour M 1.0 P 0.1 R 0.01 S 0.001

Capacitors covered by this specification are classified by the style, as specified (see 3.1).

Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Defense Electronics Supply Center, ATTN: ECT, 1507 Wilmington Pike, Dayton, OH 45444-5280, by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter.