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MIL-PRF-39009



Performance Specification, Resistors, Fixed, Wire-Wound (Power Type, Chassis Mounted), Nonestablished Reliability, and Established Reliability, General Specification For (w/Amendment 3) FSC: 5905

This specification covers the general requirements for nonestablished reliability (non-ER), and established reliability (ER), power type, wire-wound, fixed resistors which utilize the principal of heat dissipation through a metal mounting surface. The resistors have an initial resistance tolerance of ±1 percent. These resistors are suitable for continuous full load operation at an ambient temperature of +25°C, and when derated up to +250°C. These resistors should not be used in circuits where their ac performance is of critical importance in the operation of such circuits. However, provisions have been made in particular styles to minimize inductance. These resistors will have life failure rate levels (FRL) ranging from 1.0 percent to 0.001 percent per 1,000 hours. These FRL are established at a 60 percent confidence on the basis of the life tests. The FRL, identified by the appropriate symbol, is referred to operation at full rated wattage at +25°C, with a permissible change in resistance of ±2 percent as the criteria for failure.



Points of Contact:

Resistor Group Phone: 614-692-0552, 8754 Email: Resistor@dla.mil

Document Downloads

  • MIL-PRF-39009
  • Performance Specification, Resistors, Fixed, Wire-Wound (Power Type, Chassis Mounted), Nonestablished Reliability, and Established Reliability, General Specification For (w/Amendment 3) Revision: E, Dated: 07 July 2017 File Name: prf39009.pdf, File Size: 261 kb


  • MIL-PRF-39009/1D w/Amendment 2 
  • Resistors, Fixed, Wire-Wound, (Power Type, Chassis Mounted), Nonestablished Reliability, and Established Reliability, Styles RER60, RER65, RER70, and RER75
    Dated: 07 July 2017
    File name: prf39009ss1.pdf, File Size: 115 kb

  • MIL-PRF-39009/2C w/Amendment 2 
  • Resistors, Fixed, Wire-Wound,(Power Type, Chassis Mounted), Nonestablished Reliability, and Established Reliability, Styles RER40, RER45, RER50, and RER55
    Dated: 07 July 2017
    File name: prf39009ss2.pdf, File Size: 106 kb


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