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

3.25.1 Date code. The date code shall be in accordance with MIL-STD-1285.

3.25.2 JAN and J marking. The United States Government has adopted and is exercising legitimate control over

the certification marks "JAN" and "J", respectively, to indicate that items so marked or identified are manufactured to,

and meet all the requirements of specifications. Accordingly, items acquired to, and meeting all of the criteria

specified herein and in applicable specifications shall bear the certification mark "JAN" except that items too small to

bear the certification mark "JAN" shall bear the letter "J". The "JAN" and "J" shall be placed immediately before the

part number except that if such location would place a hardship on the manufacturer in connection with such marking,

the "JAN" or "J" may be located on the first line above or below the part number. Items furnished under contracts or

orders which either permit or require deviation from the conditions or requirements specified herein on in applicable

specifications shall not bear "JAN" or "J". In the event an item fails to meet the requirements of this specification and

the applicable specification sheets, the manufacturer shall remove completely the military part number and the "JAN"

or the "J" from the sample tested and also from all items represented by the sample. The "JAN" or "J" certification

mark shall not be used on products acquired to contractor drawings or specifications. The United States Government

has obtained Certificate of Registration Number 504,860 for the certification mark "JAN" and Registration Number

1,586,261 for the certification mark "J".

3.26 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally

preferable materials should be used to the maximum extent possible provided that the material meets or exceeds the

operational and maintenance requirements, and promotes economically advantageous life cycle costs.

3.27 Workmanship. Capacitors shall be processed in such a manner as to be uniform in quality and shall be free

from pits, corrosion, cracks, rough edges, and other defects that will affect life, serviceability, or appearance.

3.27.1 Soldering. Flux for soldering shall be rosin, rosin and alcohol, or rosin and turpentine. No acid or acid salts

shall be used in preparation for or during soldering. All excess flux and solder shall be removed. Electrical

connections shall be mechanically secured before soldering, where possible, and electrically continuous after

soldering.

3.27.2 Terminal. Solder lugs and solder lug terminals may be of any shape provided dimensional limits are met.

All terminals shall be coated with solder having a tin content of 40 to 70 percent.

4. VERIFICATION

4.1 Classification of inspections. The inspections specified herein are classified as follows:

a. Qualification inspection (see 4.4).

b. Verification of qualification (ER styles: See 4.5); (non-ER: See 4.5.1).

c. Conformance inspection (see 4.6).

4.2 Test equipment and inspection facilities. The supplier shall establish and maintain a calibration system in

accordance with NCSL Z540.3, ISO 10012, or equivalent, as approved by the qualifying activity.

4.3 Inspection conditions. Unless otherwise specified herein, all inspections shall be performed in accordance with

the test conditions specified in the "GENERAL REQUIREMENTS" of MIL-STD-202 except relative humidity shall not

exceed 75 percent. Accuracy of all test voltage measurements shall be within �2.0 percent of the specified voltage.

4.4 Qualification inspection. Qualification inspection shall be performed at a laboratory acceptable to the

Government (see 6.3) on sample units produced with equipment and procedures normally used in production.

4.4.1 Sample size. The number of capacitors to be subjected to qualification inspection shall be as specified in

table VI and appendix A to this specification.