Degrees C depending upon the resistance value. They are not capable for application when the alternating current \(ac\) characteristics are of critical importance; however, provisions have been made to minimize the inductance.

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MIL-PRF-18546G

6. NOTES

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

mandatory.)

6.1 Intended use. The resistors covered by this specification are military unique due to the fact that

these devices must be able to operate satisfactorily in military systems under the following demanding

conditions: 20 G's of high frequency vibration, 100 G's of shock (specified pulse), thermal shock (with no

more than 1 percent deviation in initial resistance), and a low temperature coefficient of resistance. In

addition, these military requirements are verified under a qualification system. Commercial components

are not designed to withstand these military environmental conditions.

6.2 Acquisition requirements. Acquisition documents must specify the following:

a. Title, number, and 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.

c. Packaging requirements (see 5.1).

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

which are, at the time of award of contract, qualified for inclusion in Qualified Products List (QPL) whether

or not such products have actually been so listed by the 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 awarded contracts or

orders for the products covered by this specification. Information pertaining to qualification of products

may be obtained from Defense Supply Center, Columbus, ATTN: DSCC-VQP, Post Office Box 3990,

Columbus, Ohio 43218-3990.

6.4 MIL-R-18564 substitution data. Resistors of this specification are inactive for new design, and

resistors of MIL-PRF-39009 of the same resistance value are used, are as follows:

Inactivated specification and characteristic

Substitution specification

MIL-R-18546/1 characteristic G

MIL-R-18546/1 characteristic N

6.5 Retinning leads. If retinning (hot solder dip) of the leads is required (see 3.4.3.1).

6.6 Subject term (key word) listing.

Enclosure

Heat dissipation

Metal mounting surface

Solderable

Weldable