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

3.10 Capacitance. When measured as specified in 4.7.6, the capacitance shall be not less than 90 percent nor

greater than 110 percent of the specified nominal value (see 3.1).

3.11 Dissipation factor. When measured as specified in 4.7.7, the dissipation factor shall be not more than 1.0

percent.

3.12 Insertion loss. Unless otherwise specified (see 3.1), when measured as specified in 4.7.8, the insertion loss

shall be not more than 6 decibels (dB) below the value shown on figure 2 for an ideal capacitor of the same nominal

capacitance value. Dips are permissible when tested at frequencies from 0.15 megahertz (MHz) up to that frequency

at which the insertion loss of the capacitor under test becomes 60 dB; however, at higher frequencies up to 1,000

MHz the insertion loss shall not fall below 60 dB. Deviations in the nature of dips in the curve will be permitted. Such

dips indicate a drop in insertion loss below that of an ideal capacitor followed by a rise in insertion loss, as frequency

is increased faster than the rise that is characteristic of an ideal capacitor. Such dips are also characteristic of all

extended-foil capacitors.

FIGURE 2. Insertion-loss versus frequency for an ideal capacitor.