MIL-PRF-39007-7 Resistor, Fixed, Wire-Wound \(Power Type\), Nonestablished Reliability, Established Reliability, And Space Level Style Rwr78This specification covers the associated requirements for style RWR78, nonestablished reliability, established reliability, and space level, power type, wire-wound, fixed, resistor. These resistors are available with terminal types "S" \(solderable, inductively wound\), "W" \(weldable, inductively wound\), "N" \(solderable, noninductively wound\), and "Z" \(weldable, noninductively wound\).

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MIL-PRF-39007/7H

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 of documents cited in

sections 3 and 4 of this specification, whether or not they are listed.

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.

DEPARTMENT OF DEFENSE SPECIFICATIONS

MIL-PRF-39007 - Resistors, Fixed, Wire Wound (Power Type), Nonestablished Reliability,

Established Reliability, and Space Level, General Specification for.

(Copies of these documents are available online at https://assist.daps.dla.mil/quicksearch/ or from the

Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.)

2.3 Order of precedence. Unless otherwise noted herein or in the event of a conflict between the text of

this document and the references cited herein (except for related specification 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

3.2 Interface and physical dimension. The resistor shall meet the interface and physical dimensions

specified on figure 1.

3.2.1 Noninductive windings. Noninductively wound resistors shall be identified by terminal designation N

to indicate a solderable terminal and Z to indicate a weldable terminal.

3.3 Minimum resistance value for all terminations (S, W, N, Z). For inductively wound and noninductively

wound resistors, the minimum resistance value shall be 0.1 ohm. For resistance tolerance B (.1 percent),

minimum resistance value shall be .499 ohm.

3.4 Maximum resistance value for S and W (inductively wound). For resistors having inductive

characteristic S and W designation, the maximum resistance value shall be 39,200 ohms.

3.5 Maximum resistance value for N and Z type resistors. For resistors having noninductive characteristic N

and Z designation, the maximum resistance value shall be 19,600 ohms.

3.6 Resistance temperature characteristic. The resistance temperature characteristic is resistance

depended and is as specified in table I.