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

1.2.1.1 Style. The style is identified by either the three-letter symbol "CZR" or the two-letter symbol "CZ" followed

by a two-digit number. The letters identify dc, radio-interference reduction feed through capacitors, hermetically

sealed in metal cases. The symbol "CZR" identifies established reliability (ER) capacitors; the symbol "CZ" identifies

capacitors for which no specific reliability requirements are specified (non-ER). The first digit following the letter

symbols identifies the general shape of the case, and the second digit identifies specific details other than case size.

Each style designation may include a family of case sizes.

1.2.1.2 Current. The current rating is identified by a single letter in accordance with table I.

TABLE I. Current rating.

Symbol

Current rating (dc amperes)

1.2.1.3 Characteristic. The characteristic is identified by a single letter in accordance with table II.

TABLE II. Characteristic.

Values for characteristics

High ambient test temperature, degrees Celsius �3�C

+125

+85

Low ambient test temperature, degrees Celsius �3�C

-55

Life-test voltage (see 4.7.19), in percent of rated dc voltage rating

140

�10

Capacitance tolerance (percent)

1.2.1.4 Voltage. The voltage rating is identified by a single letter in accordance with table III.

TABLE III. Voltage rating.

Voltage rating

Symbol

(Volts, dc)

100

200

400

600

1.2.1.5 Capacitance. The nominal capacitance value expressed in picofarad (pF) is identified by a three-digit

number; the first two digits represent significant figures and the last digit specifies the number of zeros to follow.

1.2.1.6 Failure rate level. The failure rate level of 1.0 percent per 1,000 hours is identified by a symbol M, and is

based on operation at rated working voltage and maximum rated temperature.

2. APPLICABLE DOCUMENTS

2.1 General. The documents listed in this section are specified in sections 3 and 4 of this specification. This

section does not include documents cited in other sections of this specification or recommended for additional

information or as examples. While every effort has been made to ensure the completeness of this list, document

users are cautioned that they must meet all specified requirements of documents cited in sections 3 and 4 of this

specification, whether or not they are listed.