MIL-PRF-39035E
6.2 Acquisition requirements. Acquisition documents should specify the following:
Title, number, and date of this specification, and the complete PIN (see 1.2).
a.
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 instructions (see 5.1).
c.
d.
Terminal lead lengths requirements (applicable to MIL-PRF-39035/2 (RJR24) only).
e.
6.3 Qualification. With respect to products requiring qualification, awards will be made only for products which are,
at the time of award of contract, qualified for inclusion in the Qualified Products List 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. Information pertaining to qualification of products may be obtained from Defense Supply Center,
Columbus, ATTN: DSCC-VQP, P.O. Box 3990, Columbus, Ohio 43218-3990
6.4 Selection and use information. Equipment designers should refer to MIL-HDBK-199, "Resistors, Selection and
Use of", for a selection of standard resistor types and values for new equipment design. All applications and use
information concerning these resistors are also provided in MIL-HDBK-199.
6.5 High resistance and voltages. Where voltages higher than 250 volts rms are present between the resistor
circuit and grounded surface on which the resistor is mounted, or where the dc resistance is so high that the insulation
resistance to ground is an important factor, secondary insulation to withstand the conditions should be provided
between the resistor and mounting or between the mounting and ground.
6.6 Mounting of resistors. Resistors should not be mounted by their flexible wire leads. Mounting hardware should
be used. Printed circuit types are frequently terminal mounted, although brackets may be necessary for a high shock
and vibration environment.
6.7 Resistance temperature characteristic. Consideration should be given to temperature rise and ambient
temperature of resistors under operation, in order to allow for the change in resistance due to resistance temperature
characteristic.
6.8 Reduction of power rating. When only a portion of the resistance element is engaged, the wattage is reduced
in directly the same proportion as the resistance.
6.9 Stacking of resistors. When stacking of resistors, care should be taken to compensate for the added rise in
temperature by derating the wattage rating accordingly.
6.10 MIL-PRF-22097 substitution data. Resistors of this specification, regardless of the their failure rate
designation, are substitutes for resistors of the same resistance value, tolerance, and performance characteristics
specified in the inactive for design detail specification of MIL-R-22097 as follows:
Substitute specification
Specification sheets inactive for new design
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