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

6. NOTES

(This section contains information of a general or explanatory nature that may be helpful, but is not

mandatory).

6.1 Intended use. These film resistors described herein are intended to be used in electronic circuits

where semiprecision characteristics and small sizes are required. These resistors are unique due to the

fact that they must be able to operate satisfactorily in military systems that have passed tests as

described in MIL-STD-202. Commercial components are not designed to withstand these military

environmental conditions.

6.2 Acquisition requirements. Acquisition documents should specify the following:

a. Title, number, date of this specification, the applicable associated specification, and the complete

PIN (see 1.2.1).

b. If not otherwise specified (see 2.1), the versions of the individual documents referenced will be

those in effect on the date of release of the solicitation.

Packaging requirements (see 5.1).

d. Allowable substitution (see 3.27.4 and 3.27.5).

e. Lead length requirements for tape and reel packaging (see 3.1).

6.3 Qualification. With respect to products requiring qualification, awards will be made only for

products which are, at the time of award or contract, qualified for inclusion in QPL whether or not such

products have actually been so listed by that date. The attention of the contractors is called to these

requirements, and manufacturers are urged to arrange to have the products that they propose to offer to

the Federal Government tested for qualification in order that they may be eligible to be awarded contracts

or orders for the products covered by this specification. The activity responsible for the qualified products

list is the Commander, Communications - Electronics Command, ATTN: AMSEL-LC-LEO-E-EP, Fort

Monmouth, NJ 07703-5023; however, information pertaining to qualification of products may be obtained

from the Defense Supply Center, Columbus (DSCC-VQP), Post Office Box 3990, Columbus, OH 43218-

3990.

6.4 Resistance tolerance. Designers should bear in mind that operation of these resistors under the

ambient conditions for which military equipment is designed, may cause permanent or temporary

changes in resistance sufficient to throw them out of their initial tolerance. In particular, operation at

extreme temperatures may cause relatively large temporary changes in resistance.

6.4.1 Resistance tolerance by characteristic. The resistance tolerance available for resistance

temperature characteristics 100 PPM and 350 PPM is 1 percent, 2 percent and 2 percent, 5 percents and

10 percent, respectively (see 3.1).

6.5 Maximum voltage. The maximum continuous working voltage specified for each of the styles (see

3.1) should in no case be exceeded, regardless of the theoretically calculated rated voltage (see 3.7).