1、 INCH-POUND MIL-PRF-39007/6H 17 October 2008 SUPERSEDING MIL-PRF-39007/6G 3 July 1997 PERFORMANCE SPECIFICATION RESISTOR, FIXED, WIRE-WOUND (POWER TYPE), NONESTABLISHED RELIABILITY, ESTABLISHED RELIABILITY, AND SPACE LEVEL STYLE RWR74 Inactive for new design after 10 July 1985 (see 6.4) For new desi
2、gn use MIL-PRF-39007/10. This specification is approved for use by all Departments and Agencies of the Department of Defense. The requirements for acquiring the product described herein shall consist of this specification sheet and MIL-PRF-39007. 1. SCOPE 1.1 Scope. This specification covers the ass
3、ociated requirements for style RWR74, 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, noninductive
4、ly wound), and “Z“ (weldable, noninductively wound). 1.2 Part or Identifying Number (PIN). Resistors covered by this specification are identified by a PIN which consists of the style designation, terminal and winding, coded resistive value, tolerance, and product level designator. The PIN is derived
5、 in accordance with MIL-PRF-39007 and is in the following form: RWR74 S 1000 F S Style Terminal wire and winding Resistance Resistance tolerance Product level designator Comments, suggestions, or questions on this document should be addressed to US Army Communications-Electronics FDEC, ATTN: AMSRD-C
6、ER-PR-D, Fort Monmouth, NJ 07703-5201 or emailed to Jeffery.carverus.army.mil. Since contact information can change, you may want to verify the currency of this address information using the ASSIST Online database at http:/assist.daps.dla.mil. AMSC N/A FSC 5905 DISTRIBUTION STATEMENT A. Approved for
7、 public release; distribution is unlimited. Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-39007/6H 22. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this sec
8、tion 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 c
9、autioned 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 sp
10、ecified 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 Spe
11、cification for. * (Copies of these documents are available online at http:/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 co
12、nflict 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
13、 3.1 General. The requirements for acquiring the product described herein shall consist of this document and MIL-PRF-39007. 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 res
14、istors 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 r
15、esistance 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 12,100 ohms. 3.5 Maximum resistance value for N and Z
16、 type resistors. For resistors having noninductive characteristic N and Z designation, the maximum resistance value shall be 6,040 ohms. * 3.6 Resistance temperature characteristic. The resistance temperature characteristic is resistance depended and is as specified in table I. Copyright Communicati
17、ons - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-39007/6H 3* Table I. Resistance temperature characteristic. Resistance range (ohms) Resistance temperature characteristic (Reference to 25C) 0.1
18、R0.499 0.499R1.0 1.0R10 10R158 158R 650 ppm 400 ppm 50 ppm 30 ppm 20 ppm Inches mm .002 0.05 .016 0.41 .031 0.79 .040 1.02 .062 1.57 .312 7.92 .875 22.23 1.500 38.10 Standard Dimensions style A .062 B (min) C .002 D .031 RWR74 .875 1.500 .040 .312 NOTES: 1. Dimensions are in inches. 2. Metric equiva
19、lents are given for general information only. 3. Dimension A is clean lead to clean lead. 4. Lead concentric tolerance is to be measured at the point of lead egress from the resistor body to be within .016 TIR. FIGURE 1. Style RWR74 resistor. Copyright Communications - Electronics Command Provided b
20、y IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-39007/6H 43.7 Power rating. The power rating shall be 5 watts at +25C. 3.8 Weight. The maximum weight shall be .01103 pound (5 grams); for N type resistors the maximum weight shall
21、 be .01323 pound (6 grams). 3.9 Terminal lead types. This style resistor is available in both solderable (S and N) and weldable (W and Z) leads. 4. VERIFICATION 4.1 Sampling and inspection. Sampling and inspection shall be in accordance with MIL-PRF-39007. 4.2 Short-time overload. The duration of ap
22、plied voltage shall be 5 seconds. Voltage applied shall be equivalent to 10 times rated wattage. 4.3 Dielectric withstanding voltage. 4.3.1 Atmospheric pressure. The magnitude of test voltage shall be 1,000 volts rms. 4.3.2 Barometric pressure (reduced). The test voltage shall be 300 volts rms. 4.4
23、Terminal strength. The applied force shall be 10 pounds. 5. PACKAGING * 5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the contract or order (see 6.2). When packaging of material is to be performed by DoD or in-house contractor personnel, these personnel
24、 need to contact the responsible packaging activity to ascertain packaging requirements. Packaging requirements are maintained by the Inventory Control Points packaging activities within the Military Service or Defense Agency, or within the military services system commands. Packaging data retrieval
25、 is available from the managing Military Departments or Defense Agencys automated packaging files, CD-ROM products, or by contacting the responsible packaging activity. 6. NOTES (This section contains information of a general or explanatory nature that may be helpful, but is not mandatory.) 6.1 Note
26、s. In addition to the notes specified herein, the notes specified in MIL-PRF-39007 are applicable to this specification. Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-39
27、007/6H 56.2 Acquisition requirements. Acquisition documents must specify the following: a. Title, number, and date of this specification, the applicable associated specification, and the complete PIN (see 1.2). * b. Unless otherwise specified (see 2.1), the versions of the individual documents refer
28、enced will be those in effect on the date of release of the solicitation. c. Packaging requirements (see 5.1). 6.3 MIL-R-26 substitution data. Resistors of this specification regardless of their failure rate are substitutes for resistors of the same resistance value, tolerance, and appropriate chara
29、cteristics specified in the inactive specification MIL-R-26/5, style RW74. 6.4 Authorized use. The resistors specified herein are not for use in design after 10 July 1985. They are authorized for use in design contracts effective prior to 11 May 1973, to support existing military equipment. All new
30、contracts requesting to use the RWR74 should use RWR84 of MIL-PRF-39007/10. * 6.4 Changes from previous issue. The margins of this specification are marked with asterisks to indicate where changes from the previous issue were made. This was done as a convenience only and the Government assumes no li
31、ability whatsoever for any inaccuracies in these notations. Bidders and contractors are cautioned to evaluate the requirements of this document based on the entire content irrespective of the marginal notations, and relationship to the last previous issue. Custodians: Preparing activity: Army - CR A
32、rmy - CR Navy - EC Air Force - 85 Agent: NASA - NA DLA - CC Review activities: Army - AR, MI (Project 5905-2007-045) Navy - AS, CG, MC, OS Air Force - 19 NOTE: The activities listed above were interested in this document as of the date of this document. Since organizations and responsibilities can change, you should verify the currency of the information above using the ASSIST Online database at http:/assist.daps.dla.mil. Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
