MIL-PRF-39002C
6.2.1.5 Terminals. The terminals are identified by a single letter in accordance with table XI.
TABLE XI. Terminals.
Symbol
Type of terminal
S
Solder lug
6.2.1.6 Resistance. The nominal total resistance value expressed in ohms is identified by a three digit number; the
first two digits represent significant figures and the last digit specified the number of zeros to follow. The following are
examples of symbols for resistance values:
100
=
10
ohms
101
=
100
ohms
102
=
1000
ohms
6.2.2 Indirect shipments. The packaging specified in section 5 applies only to direct purchases by or direct
shipment to the Government and are not intended to apply to contracts or orders between the supplier and prime
contractor.
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 Qualified Product List QPL-39002 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 DLA Land and
Maritime, ATTN: VQP, 3990 East Broad Street, Columbus, OH 43218-3990 or via the internet at:
6.4 Sequence for examinations, measurements, and tests. Sequence of examinations, measurements, and tests
should be in accordance with table XII, and are indicated by the following symbols:
B = Before test.
D = During test.
A = After test.
6.5 High resistances 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 with stand the conditions should be
provided between the resistor and mounting or between the mounting and ground.
6.6 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. Unless care is exercised, resistance tolerance may easily be exceeded.
6.7 Supersession data. This specification supersedes temperature characteristic symbol 1 and symbol 2 and
resistance characteristic A and characteristic C of MIL-R-27208/6(USAF) dated 20 October 1959.
6.8 Reduction of power rating. When only a portion of the resistance element is engaged, the wattage rating is
reduced in approximately the same proportion as the resistance.
O
6.9 Power rating. Resistors are rated at 85 C ambient temperature when mounted on metal plate area (equivalent
to the specified test chassis (see 4.6.19a). When resistors are mounted on other than metal plates, the free air rating
are approximately 50 percent of the rated power (see 3.1).
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