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Department of Defense Specification |
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|  MIL-R-27208/4J
DEPARTMENT OF DEFENSE SPECIFICATION
- Resistor, Variable, Wire wound, Nonprecision, General Specification for.
(Copies of these documents are available online at http://assist.daps.dla.mil/quicksearch/ or http://assist.daps.dla.mil
or from the Standard Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia PA 19111-5094.)
2.3 Order of precedence. In the event of a conflict between the text of this document, and the references cited
herein (except for associated specifications, specification sheets, or MS sheets); the text of this document takes
precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific
exemption has been obtained.
3. REQUIREMENTS
3.1 General. The requirements for acquiring the product described herein shall consist of this document and
3.2 Interface and physical dimensions. The resistors shall meet the interface and physical dimensions specified in
3.3 Power rating. The power rating shall be 0.750 watt, based on full load operation at an ambient temperature of
o
85 C.
3.4 Nominal resistance value, maximum resolution, and maximum rated ac or dc working voltage. Nominal
resistance values, maximum resolutions, and maximum rated ac or dc working voltages are specified in table I.
TABLE I. Nominal resistance value, maximum resolution,
and maximum rated ac or dc working voltage.
Nominal resistance
Maximum
Maximum rated ac or dc
value
resolution 1/
working voltage
Ohms
Percent
Volts
0.65
6.1
50
0.51
8.7
100
0.42
12.3
200
0.42
19.4
500
0.36
27.4
1,000
0.29
38.7
2,000
0.26
61.3
5,000
10,000 2/
0.17
86.7
20,000 3/
0.15
122.0
1/ Maximum resolution shown are theoretical.
2/ Value based on the use of wire having no less that a 0.001 inch nominal diameter.
3/ Value based on the use of wire having no less that a 0.0008 inch nominal diameter.
3.5 Actual effective electrical travel. The actual effective electrical travel shall be 20 turns minimum and 45 turns
maximum.
3.6 Operating torque. The torque required to effect rotation shall be 5 inch-ounce maximum.
3.7 Termination "L". Termination "L" uses 100 percent tin platting on the internal tab (see 6.6).
*
2
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