MIL-PRF-39035 Resistor, Variable, Nonwirewound \(Adjustment Type\), Nonestablished Reliability, And Established Reliability, General Specification ForThis specification covers the general requirements for nonestablished reliability \(non-ER\) and established reliability \(ER\), multiturn lead-screw actuated, and single-turn, nonwirewound, variable resistors with a contact bearing uniformly over the surface of the entire resistive element, when positioned by an actuator. These resistors are capable of full-load operation \(when the maximum resistance is engaged\), at a maximum temperature of 150 Degrees C, with a resistance tolerance of ??10 percent. The ER resistors will have life failure rate levels ranging from 1.0 to 0.001 percent per 1,000 hours \(see 1.2.1.5\). These failure rate levels are established at a 60 percent confidence level maintained at 10 percent producer\'s risk on the basis of the life tests.

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MIL-PRF-39035E

1.2.1.4 Resistance. The nominal total value expressed in ohms is identified by a three digit number; the first two

digits represent significant figures and the last digit specifies the number of zeros to follow. The following are

examples of symbols for resistance values.

101

100 ohms

102

1,000 ohms

1.2.1.5 Product level designator. The product level designation as shown in table III is signified by a single letter

(M, P, R, S, or C), which identifies the product level for which the resistor is qualified.

TABLE III. Product level designator.

Product level

Product level 1/

designator

Non-ER

1.0

0.1

0.01

0.001

1/ FR in percent/1,000 hours.

2. APPLICABLE DOCUMENTS

2.1 General. The documents listed in this section are specified in sections 3 and 4 of this specification. This

section does not include documents cited in other sections of this specification or recommended for additional

information or as examples. While every effort has been made to ensure the completeness of this list, document

users are cautioned that they must meet all specified requirements documents cited in sections 3 and 4 of this

specification, whether or not they are listed.

2.2 Government documents.

2.2.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a

part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are

those cited in the solicitation or contract (see 6.2).

DEPARTMENT OF DEFENSE SPECIFICATION

Resistors, Variable, Nonwirewound (Adjustment Type, Lead Screw

Actuated), Nonestablished Reliability, and Established Reliability,

Style RJR12. INACTIVE FOR NEW DESIGN

Resistors, Variable, Nonwirewound (Adjustment Type, Lead Screw

Actuated), Nonestablished Reliability, and Established Reliability,

Style RJR24.

Resistors, Variable, Nonwirewound (Adjustment Type, Lead Screw

Actuated), Nonestablished Reliability, and Established Reliability,

Style RJR26.

Resistors, Variable, Nonwirewound (Adjustment Type, Single Turn),

Nonestablished Reliability, and Established Reliability, Style RJR50.