INCH-POUND
MIL-PRF-39015E
5 October 2006
SUPERSEDING
MIL-PRF-39015D
19 May 1997
PERFORMANCE SPECIFICATION
RESISTORS, VARIABLE, WIRE WOUND,
(LEAD SCREW ACTUATED),
NONESTABLISHED RELIABILITY, AND ESTABLISHED RELIABILITY,
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 nonestablished reliability (non-ER)
and established reliability (ER), lead screw actuated; wire wound variable resistors with a contact bearing
uniformly over the surface of the entire resistive element, wound linearly, when positioned by a multiturn
lead screw actuator. These resistors are capable of full load operation (when the maximum resistance is
engaged), at a maximum temperature of 85șC and are capable for continuous operation, when properly
derated, at maximum temperature of 150șC (see 3.6), with a resistance tolerance of ±5 percent. The ER
resistors have life failure rate (FR) levels ranging from 1.0 percent to 0.001 percent per 1,000 hours (see
1.2.1.4). These FR levels are established at a 60 percent confidence level on the basis of life tests.
1.2 Classification.
*
1.2.1 Part or Identifying Number (PIN). Resistors specified herein are identified by the PIN which
consists of the basic number, associated specification, and a coded number.
M39015/2
-
001
P
M
│
│
│
│
│
│
│
│
Product level
Associated
Resistance
Terminals
specification
value designator
(see 1.2.1.3
designator
number
(see 1.2.1.2)
& 6.14)
(see 1.2.1.4)
1.2.1.1 Style. The style is identified by the three-letter symbol "RTR" followed by a two-digit number;
the letters identify lead screw actuated, wire wound, variable resistors, and the number identifies the
physical size.
Comments, suggestions, or questions on this document should be addressed to: US Army
Communications-Electronics Command and Fort Monmouth, ATTN: AMSEL-LC-LEO-E-EP, Fort
Monmouth, NJ 07703-5023 or emailed to Jeffery.Carver@mail1.monmouth.army.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.
AMSC N/A
FSC 5905
DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited.
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