MIL-PRF-39002 Resistors, Variable, Wirewound, Semi-Precision, General Specification ForThis specification covers the general requirements for semi-precision, wirewound, variable, resistors having a resistance element of wire, wound on an arc shaped insulated form, so that a contact bears uniformly on the resistance element, when adjusted by a contact shaft. The electrical output \(in terms of percent of applied voltage\) is linear with respect to the angular position of the contact arm. These resistors are capable of full-load operation \(when the maximum resistance is engaged\) at a maximum ambient temperature of 85 Degrees C, and are suitable for continuous operation, when properly derated, at a maximum temperature of 135 Degrees C. These resistors have a tolerance of ??5 percent.

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INCH-POUND

MIL-PRF-39002C

24 August 2010

SUPERSEDING

MIL-PRF-39002B

14 May 2004

PERFORMANCE SPECIFICATION

RESISTORS, VARIABLE, WIREWOUND, SEMI-PRECISION,

GENERAL SPECIFICATION FOR

This specification is approved for use by all Departments

and Agencies of the Department of Defense.

1. SCOPE

1.1 Scope. This specification covers the general requirements for semi-precision, wirewound, variable, resistors

having a resistance element of wire, wound on an arc shaped insulated form, so that a contact bears uniformly on the

resistance element, when adjusted by a contact shaft. The electrical output (in terms of percent of applied voltage) is

linear with respect to the angular position of the contact arm. These resistors are capable of full-load operation (when

the maximum resistance is engaged) at a maximum ambient temperature of 85 C, and are suitable for continuous

operation, when properly derated, at a maximum temperature of 135 C. These resistors have a tolerance of

�5 percent.

1.2 Classification.

1.2.1 Part or Identification Number (PIN). Resistors specified herein are identified by the PIN which consist of the

basic number, associated specification, and a coded dash number (see 3.1, 6.2, and 6.2.1).

M39002/01

0001



Basic and associated

Coded dash number

Specification number

(see 1.2.1.1)

1.2.1.1 Coded dash number. The coded dash number is a coded value which identifies the shaft and type

mounting, length of operating shaft, resistance temperature characteristic, terminals and resistance.

1.2.2 Summary of requirements. The summary of requirements of the styles of this specification is in accordance

with table I (see section 3).

Comments, suggestions, or questions on this document should be addressed to DLA Land and Maritime,

ATTN: VAT, Post Office Box 3990, Columbus, OH 43218-3990, or emailed to Resistor@dla.mil. Since contact

information can change, you may want to verify the currency of this address information using the ASSIST

AMSC N/A

FSC 5905