MIL-PRF-39017 Resistors, Fixed, Film \(Insulated\), Nonestablished Reliability, And Established Reliability, General Specification ForThis specification covers the general requirements for nonestablished reliability \(non-ER\) and established reliability \(ER\), insulated, film, fixed resistors. These resistors are capable of full load operation at an ambient temperature of 70 Degrees C and have a resistance temperature characteristic of 100 parts per million \(PPM\) and 350 PPM per degree Celsius \(PPM/Degrees C\). The ER resistors have life failure rate \(FR\) levels ranging from 1.0 percent to 0.001 percent per 1,000 hours \(see 1.2.1.4\). These FR levels are established at a 60 percent confidence level on the basis of life tests. Designers are CAUTIONED on using these resistors in high power pulse applications \(see 6.13.2\).

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MIL-PRF-39017G

4.2 Reliability and quality.

4.2.1 QPL system. The manufacturer shall establish and maintain a QPL system in accordance with

3.3. Evidence of such compliance is a prerequisite for qualification and retention of qualification.

4.2.2 SPC. A SPC program shall be establish and maintained in accordance with EIA-557. Evidence

of such compliance shall be a prerequisite for qualification and verification of qualification.

4.3 Inspection conditions and precautions.

4.3.1 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.

4.3.2 Precautions. Adequate precautions shall be taken during inspection to prevent condensation of

moisture on resistors, except during moisture resistance test. Precautions shall be taken to prevent

damage by heat when soldering resistor leads to terminals.

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

the Government (see 6.3).

4.4.1 Sample. The number of sample units comprising a sample of resistors to be submitted for

qualification inspection shall be as specified in the appendix to this specification. The sample shall be

taken at random from a production run and shall be produced with equipment and procedures normally

used in production. With the exception of style RLR32, which shall be qualified separately (see 3.1).

4.4.2 Test routine. Sample units shall be subjected to the qualification inspection specified in table IX, in

the order shown. All 294 sample units shall be subjected to the inspection of group I. The 294 sample

units shall then be divided as specified in table IX for group III through VII inclusive, and subjected to the

inspection for their particular group. Twelve additional samples shall be subjected to group II. An

additional ten units shall be subjected to group VIII.

As an option, the manufacturer may develop a control procedure for minimum stabilization times

required for RTC testing. This procedure shall detail specific time elements required to reach thermal and

electrical stability for specific part designs. Documentation of this procedure and supporting results shall

be submitted to the qualifying activity for approval. Upon approval by the qualifying activity, the

manufacturer may use this procedure for minimum stabilization times for RTC testing.

4.4.3 Defectives. Defectives in excess of those allowed in table IX shall be cause for refusal to grant

qualification approval.