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

APPENDIX A

A.3.1.4 Watt-second rating calculation. The watt-second rating will be determined by the following formula:

CE2

Where: W = energy content in watt-seconds.

C = nominal capacitance in farads.

E = dc voltage rating in volts.

A.4. EXTENT OF QUALIFICATION

A.4.1 Single-PIN submission. Qualification will be restricted to the PIN submitted.

A.4.2 Single-style submission. Qualification of the PINs submitted will be extended to PINs whose watt-second

and voltage ratings are not greater than the highest watt-second and voltage ratings submitted, and whose

capacitance values are not less than the lowest capacitance value submitted. In addition, submission and

qualification of PINs in one characteristic automatically carries with it qualification of the lower characteristics,

provided the units are of the same style, material, impregnant or filling compound and construction (e.g. qualification

of characteristic K provides the basis for qualification of characteristics K and E). Qualification of ER parts will give

qualification of non-ER parts of the same dielectric, construction, voltage ratings, current ratings and capacitance

values.

A.4.3 Combined-style submission. Qualification of the PINs submitted will be extended to PINs of each style

submitted whose watt-second and voltage ratings are not greater than the highest watt-second and voltage ratings

submitted, and whose capacitance values are not less than the lowest capacitance value submitted. In addition,

submission and qualification of PINs in one characteristic automatically carries with it qualification of the lower

characteristics, provided the units are of the same material, impregnant or filling compound and construction (e.g.

qualification of characteristic K provides the basis for qualification of characteristics K and E). Qualification of ER

parts will give qualification of non-ER parts of the same dielectric, construction, voltage ratings, current ratings and

capacitance values.