MIL-PRF-23269 Capacitors, Fixed, Glass Dielectric, Established Reliability, General Specification ForThis specification covers the general requirements for established reliability, glass dielectric, fixed capacitors. Capacitors covered by this specification have failure rate levels \(FRL\) established in accordance with MIL-STD-690. These FRL are established at a 90 percent confidence level and maintained at a 10 percent producer\'s risk and are based on life tests performed with rated voltage applied at 125 Deg. C. An acceleration factor of 5:1 has been used to relate life test data obtained at 150 percent of rated voltage at 125 Deg. C to rated voltage at 125 Deg. C. 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 manufacturing process to minimize variation in production of ER capacitors supplied to the requirements of this specification.

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MIL-PRF-23269G

4.4.4 FRL and quality level verification.

4.4.4.1 FR qualification and lot conformance FR inspection. FR qualification and lot conformance FR inspection

shall be in accordance with the general and detailed requirements of MIL-STD-690 with the following details:

a. Procedure I: Qualification at the initial FRL. Level M of FRSP-90 shall apply. Sample units which have

been subjected to the qualification inspection specified in group VI, table III (see 4.4.2) shall be continued on

test as specified in 4.7.20.3.1.

b. Procedure II: Extension of qualification to lower FRL. To extend qualification to the R and S FRL, data from

two or more styles of similar construction (see 4.6.1.1) may be combined.

c. Procedure III: Maintenance of FRL qualification. Maintenance period B of FRSP-10 shall apply. Regardless

of the number of production lots produced during this period, the specified number of unit hours shall be

accumulated to maintain qualification.

d. Procedure VII: Lot conformance FR inspection. Lot conformance FR inspection shall be in accordance with

4.4.4.2 Quality level verification. The contractor is responsible for establishing a quality system to verify the ppm

defect level of lots. The ppm defect level shall be based on a 6-month moving average.

4.5 Verification of qualification. Every six months, the manufacturer shall verify the retention of qualification to the

qualifying activity. Continuation of qualification shall be based on meeting the following requirements:

The capacitor design has not been modified.

Lot rejection for group A inspection does not exceed 10 percent or one lot, whichever is greater.

FRL's.

PPM assessment.

4.6 Conformance inspection.

4.6.1 Inspection of product for delivery. Inspection of product for delivery shall consist of group A inspection.

4.6.1.1 Inspection lot. An inspection lot shall consist of capacitors from the same production line or lines, of one

or more styles, from the same basic design, produced under essentially the same conditions, and offered for

inspection during a period not exceeding 1 month. Each lot shall be kept separate from every other lot. The sample

selected from the lot shall be representative of the capacitance values and case sizes in the lot. All sample units

belonging to a lot shall be identified by means of a code symbol (either letters or numbers, at the option of the

manufacturer). The following styles are considered to be of similar construction and may be combined for

conformance testing and FRL maintenance:

Group

Styles

CYR10 (/1), CYR15 (/2).

CYR51, CYR52, and CYR53 (/10).

A separate sample for each of the two groups shall be submitted for conformance testing and FRL maintenance.