MIL-PRF-27208 Resistor, Variable, Wirewound, Nonprecision General Specification ForThis specification covers the general requirements for multiturn, lead-screw actuated and single turn wirewound, variable resistors with a contact bearing uniformly over the entire surface of the entire resistive element, wound linearly, when positioned by an actuator. These resistors are capable of full load operation \(where maximum resistance is engaged\) at maximum ambient temperature of 85 Degrees C, and are capable for continuous operation when properly derated, at a maximum temperature of 150 Degrees C \(see figure 2\). These resistors have a resistance tolerance of ┬▒5 percent \(see 3.1\).

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INCH-POUND

MIL-PRF-27208F

11 October 2006

SUPERSEDING

MIL-PRF-27208E

13 June 2001

PERFORMANCE SPECIFICATION

RESISTOR, VARIABLE, WIRE WOUND, NONPRECISION

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 multiturn, lead-screw actuated and single turn

wire wound, variable resistors with a contact bearing uniformly over the entire surface of the entire resistive element,

wound linearly, when positioned by an actuator. These resistors are capable of full load operation (where maximum

resistance is engaged) at maximum ambient temperature of 85oC, and are capable for continuous operation when

properly derated, at a maximum temperature of 150oC (see figure 2). These resistors have a resistance tolerance of

�5 percent (see 3.1).

1.2 Classification.

1.2.1 Part or identifying number (PIN). The PIN is in the following form and as specified (see 3.1 and 6.2).

RT10

102

⏐

Resistance

Temperature

Terminals

temperature

Style

Resistance

characteristic

characteristic

1.2.1.1 Style. The style is identified by the two letter symbol "RT" followed by a two digit number. The letters

identify adjustment type, wirewound, variable resistors and the number identifies the physical size.

1.2.1.2 Resistance temperature characteristic. The resistance temperature characteristic of the completed resistor

is identified by a single letter in accordance with table I.

Comments, suggestions, or questions on this document should be addressed to: Defense Supply Center,

Columbus, ATTN: DSCC-VAT, Post Office Box 3990, Columbus Ohio 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 Online database at https://assist.daps.dla.mil.

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