MIL-PRF-11693 Capacitors, Feed Through, Radio-Interference Reduction, Dc \(Hermetically Sealed In Metal Cases\), Established And Non-Established Reliability General Specification ForThis specification covers the general requirements for established reliability \(ER\) and non-ER capacitors designed for operation with direct current \(dc\), paper, paper plastic, and plastic \(extended foil\) dielectric, radio-interference-reduction, feed-through capacitors, hermetically sealed in metal cases \(see 6.6.2\), for use primarily in broadband, radio-interference suppression application. Capacitors meeting the established reliability requirements specified herein have a maximum failure rate of 1.0 percent per 1,000 hours. This failure rate is established with a 90-percent confidence limit based on the life test parameters specified and are maintained at a 10-percent producer?╞s risk. An acceleration factor of 5:1 has been used to relate the life test data obtained at 140 percent of rated dc voltage at the applicable high test temperature to the rated voltage at the applicable high test temperature.

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MIL-PRF-11693E

In the event that no production occurred during the reporting period, a report shall be submitted certifying that the

company still has the capabilities and facilities necessary to produce the item. If during 3 consecutive reporting

periods there has been no production, the manufacturer may be required, at the discretion of the qualifying activity, to

submit (the products, a representative product of each type, grade, class, etc.) to testing in accordance with the

qualification inspection requirements.

4.6 Conformance inspection.

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

Except as specified in 4.6.2.3, delivery of products which have passed group A inspection shall not be delayed

pending the results of group B inspection.

4.6.1.1 Inspection lot. An inspection lot shall consist of all capacitors of the same style, current and voltage ratings

produced under essentially the same conditions, and offered for inspection at the same time. ER parts shall be kept

separate from non-ER parts.

4.6.1.2 Group A inspection. Group A inspection shall consist of the examinations and tests specified in table VII in

the order shown.

4.6.1.2 1 Sampling plan. The sampling plan shall be as specified in table VII. In the event of one or more failures,

the lot shall be rejected.

4.6.1.2.2 Subgroup 1. If during the 100 percent inspection of subgroup 1 (ER parts only), screening requires that

over 5 percent of the capacitors be discarded, the lot shall be rejected and shall not be supplied to this specification.

4.6.1.2.3 Manufacturers production inspection for ER parts only. If the manufacturer performs tests similar to

those specified in subgroup 1, table VII, as the final step of his production process, group A, subgroup 1 inspection

may be waived and the data resulting from the manufacturer's production tests may be used instead. Authority to

waive the subgroup 1 inspection shall be granted by the qualifying activity only. The following criteria must be

complied with:

a. Tests conducted by the manufacturer during production shall be clearly identical to or more stringent than that

specified for subgroup 1.

b. Manufacturer subjects 100 percent of the product supplied under this specification to their production tests.

c. The parameters measured and the failure criteria shall be the same or more stringent than those specified

herein.

d. The lot rejection criteria is the same or more stringent than that specified herein.

4.6.1.2.4 Rejected lots. If an inspection lot is rejected, the supplier may rework it to correct the defects, or screen

out the defective units, and resubmit for reinspection. If one or more defects are found during this reinspection, the

lot shall be rejected and not be supplied to this specification. Reinspected lots shall be separate from new lots, and

shall be clearly identified as reinspected lots.

4.6.1.2.5 PPM calculations (ER and non-ER). The manufacturer shall establish and maintain a system for

assessing and calculating average outgoing quality of capacitors. A PPM rate combining IR, capacitance, and DF

shall be assessed for lots that have passed the group A inspection. The manufacturer's PPM system shall also

address rectification procedures for lots failing PPM assessment. Data from the rectification process shall not be

used to calculate PPM.