MIL-PRF-22684 Resistors, Fixed, Film \(Insulated\) General Specification ForThis specification covers the general requirements for insulated, film, fixed resistors of 2- and 5- percent resistance tolerance. These resistors are capable of full-load operation at an ambient temperature of 70 degrees C and have a resistance-temperature characteristic of +200 parts per million per degree Celsius \(ppm/degrees C\), \(see 6.1\). Designers are CAUTIONED on using these resistors in high power pulse applications \(see 6.10\).

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MIL-PRF-22684F

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

order shown. All sample units except those designated for solderability shall be subjected to the inspection of group I.

Forty sample units shall then be divided equally into four groups for groups II to V inclusive; the remaining 10 units

shall be subjected to group VI.

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

approval.

4.4.4 Retention of qualification. Every year, the manufacturer shall verify the retention of qualification to the

qualifying activity. In addition, the manufacturer shall immediately notify the qualifying activity whenever the group B

results indicate failure of the qualified product to meet the requirements of the specification. Verification shall be

based on meeting the following requirements:

a. The manufacturer has not modified the design of the item.

b. The specification requirements for the item have not been amended so far as to affect the character of the item.

c. Lot rejection for group A inspection does not exceed the group A sampling plan.

d. The requirements for group B inspection are met.

When group B requirements were not met and the manufacturer has taken corrective action satisfactory to the

Government, group B inspection retesting shall be instituted.

4.4.5 Alternate inspection. For the purpose of retention of qualification and conformance inspection (see 4.4,

4.4.4, and 4.5) test results on identical items covered by MIL-PRF-39017 may be used.

4.5 Conformance inspection.

4.5.1 Inspection of product for delivery. Inspection of product for delivery shall consist of group A and group B

inspection. Delivery of shipment shall not be delayed pending completion of group B testing.

4.5.1.1 Inspection lot. An inspection lot, as far as practical, shall consist of all the resistors of the same style,

characteristic, and protective enclosure or coating and manufactured under essentially the same process and

conditions during a manufacturing period of 1 month maximum.

4.5.1.1.1 Production lot. A production lot shall consist of all resistors of the same style, nominal resistance value,

resistance tolerance, and termination type.