MIL-PRF-39001 Capacitors, Fixed, Mica Dielectric, Established Reliability And Nonestablished Reliability, General Specification ForThis specification covers the general requirements for established reliability \(ER\) and nonestablished reliability \(non-ER\), mica dielectric, fixed capacitors \(see 6.1\). The ER capacitors have a failure rate level \(FRL\) ranging from 1.0 percent per 1,000 hours to 0.001 percent per 1,000 hours \(see 1.2.1.7\). The FRL is established at a 90 percent confidence level. The FRL, identified by the applicable symbol specified in table V is referred to operational life at full rated voltage \(see 1.2.1.6\) at 125 degrees C or 150 degrees C, as applicable. An acceleration factor of 25:1 has been used to relate the life test at 150 percent of rated voltage at rated temperature to rated voltage at rated temperature.

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MIL-PRF-39001E

3.20 Life. When tested as specified in 4.7.16, capacitors shall meet the following requirements:

a. DWV: As specified in 3.6.

b. IR: Shall not be less than the applicable value specified on figure 1 or in table VI.

c. Cap: The capacitance change shall not exceed �1 percent or �1 pF, whichever is greater, of the initial

measurement.

d. DF: Shall not be greater than 150 percent of the initial requirement (see 3.11).

e. Visual examination: No visible evidence of deterioration, permanent damage to leads or case, arcing, or

breakdown.

3.21 Fungus. The manufacturer shall certify that all external materials are fungus resistant or shall perform the

test specified in 4.7.17. When capacitors are tested as specified in 4.7.17, examination shall disclose no evidence

of fungus growth on the external surface of the capacitor.

3.22 Resistance to solvents. When capacitors are tested as specified in 4.7.18, marking shall remain legible and

shall not smear or rub off. In addition, there shall be no visible indication of damage or deterioration to the capacitor

body.

3.23 Marking. Marking of capacitors shall conform to method 1 of MIL-STD-1285, and unless otherwise specified

(see 3.1), shall include the type designation, JAN brand, trademark, source code, date code (inspection lot of

4.6.1.1.1), rated voltage, capacitance, capacitance tolerance, and highest rated temperature. Capacitors shall be

marked as specified (see 3.1).

3.23.1 "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 military 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" or "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 or 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 or associated specifications, the

manufacturer shall remove completely the military part number and the "JAN" or "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".

3.23.2 MIL-C-5 non-ER marking. An ER part manufactured in accordance with this specification may be marked

and furnished as a non-ER part from MIL-C-5 if produced on the same assembly line, and provided it is subjected to

and meets all the inspection requirements of the ER part.

3.23.3 Substitutability of FRL and product levels. A manufacturer may supply to all higher FRLs than to which he

is qualified, see table VII. Parts qualified and marked to lower FRLs, with acquiring agency approval, are

substitutable for higher FRLs, and shall not be remarked unless specified in the contract or acquisition document