MIL-PRF-19978 Capacitors, Fixed, Plastic \(Or Paper-Plastic\) Dielectric \(Hermetically Sealed In Metal, Ceramic Or Glass Cases\), Established And Non-Established Reliability General Specification ForThis specification covers the general requirements for established reliability \(ER\) and non-established reliability \(non-ER\), direct current \(dc\), plastic or paper-plastic dielectric, fixed capacitors, hermetically sealed in metal or ceramic or glass cases. Capacitors meeting the established reliability requirements specified herein have failure rate \(FR\) levels ranging from 1.0 percent to 0.001 percent per 1,000 hours \(see 1.2.1.9\). These FRLs are established at a 90-percent confidence level and maintained at a 10-percent producer\'s risk and are based on life tests performed at maximum rated voltage and maximum rated temperature. 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. This specification also covers removable mounting retainers for use with applicable capacitors \(see 3.1\). A parts per million \(ppm\) quality system is used for documenting and reporting the average outgoing quality of ER capacitors supplied to this specification. Statistical process control \(SPC\) techniques are required in the manufacturing process to minimize variation in production of ER capacitors supplied to the requirements of this specification.

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MIL-PRF-19978K

3.30 Marking.

3.30.1 Capacitors. Marking of capacitors shall conform to method I of MIL-STD-1285 and shall include the PIN,

"JAN" brand (ER styles only), trademark (optional), commercial and Government entity (CAGE) code, date code, lot

symbol, and when space permits, capacitance (in F), capacitance tolerance, and rated voltage, and when

applicable, failure rate level. Marking shall not be applied to the insulating sleeve. Unless otherwise specified (see

3.1), capacitors shall be marked as shown in the following example:

Example:

CQR09A1MC152K1M

PIN.

JAN TM 12345

"JAN" brand (ER styles only), trademark (optional) and CAGE code.

0150A.0011F

Date code, lot symbol, and capacitance.

10% 1,000 V dc

Capacitance tolerance and rated voltage.

3.30.2 Partial marking. For tubular capacitors with case size of .15 by .406, .105 by .406, and .235 by .406, the

following partial marking may be used.

Trademark

(optional)

Circuit diagram

Terminal

J for JAN

(when applicable)

Style number

125

Characteristic

Failure rate level (when applicable)

Capacitance tolerance

Capacitance value (see 1.2.1.6)

Voltage

12345

0310

CAGE code

Date code

3.30.3 Retainer. Retainers shall be marked with the PIN, trademark (optional), and CAGE code. Marking shall be

on the outer surface of the retainers.

3.30.4 JAN and J marking (ER styles only). 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".

3.30.5 Substitution of failure rate levels (FRL's). A manufacturer may supply to all higher FRL than to which they

are qualified. Items of an exponential FRL as shown in table VIII and marked to lower FRL with acquiring agency

approval, are substitutable for higher FRL, and shall not be remarked unless specified in the contract or purchase

order (see 6.2), the lot date codes on the parts are unchanged, and the workmanship criteria is met.