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MIL-PRF-19978



Capacitors, Fixed, Plastic (or Paper-Plastic) Dielectric (Hermetically Sealed in Metal, Ceramic or Glass Cases), Established and Non-Established Reliability General Specification for FSC: 5910

This specification covers the general requirements for established reliability (ER) and non-established reliability (non-ER), direct current (dc), plastic or paper-plastic dielectric, fixed capacitors, hermetically sealed in metal or ceramic or glass cases. Capacitors meeting the established reliability requirements specified herein have failure rate (FR) levels ranging from 1.0 percent to 0.001 percent per 1,000 hours. These FRLs are established at a 90-percent confidence level and maintained at a 10-percent producer's risk and are based on life tests performed at maximum rated voltage and maximum rated temperature. An acceleration factor of 5:1 has been used to relate the life test data obtained at 140 percent of rated dc voltage at the applicable high test temperature to the rated voltage at the applicable high test temperature. This specification also covers removable mounting retainers for use with applicable capacitors. A part per million (ppm) quality system is used for documenting and reporting the average outgoing quality of ER capacitors supplied to this specification. Statistical process control (SPC) techniques are required in the manufacturing process to minimize variation in production of ER capacitors supplied to the requirements of this specification.



Points of Contact:

Capacitor/Filter Group Phone: 614-692-4709 Email: CapacitorFilter@dla.mil

Document Downloads

  • MIL-PRF-19978
  • Capacitors, Fixed, Plastic (or Paper-Plastic) Dielectric (Hermetically Sealed in Metal, Ceramic or Glass Cases), Established and Non-Established Reliability General Specification for Revision: K, Dated: 26 March 2009 File Name: prf19978.pdf, File Size: 256 kb


  • MIL-PRF-19978K Supplement 1 
  • List of MIL-PRF-19978K Associated Specifications
    Dated: 26 March 2009
    File name: prf19978sup1.pdf, File Size: 14 kb

  • MIL-PRF-19978/1F 
  • Capacitors, Fixed, Plastic (or Paper-Plastic) Dielectric, (Hermetically Sealed in Metal Cases), Styles CQ08, CQ09, CQ12, and CQ13
    Dated: 15 October 2009
    File name: prf19978ss1.pdf, File Size: 458 kb

  • MIL-PRF-19978/2E 
  • Capacitors, Fixed, Plastic (or Paper-Plastic) Dielectric, (Hermetically Sealed in Ceramic or Glass Cases), Style CQ20
    Dated: 15 October 2009
    File name: prf19978ss2.pdf, File Size: 121 kb

  • MIL-PRF-19978/3H 
  • Capacitors, Fixed, Plastic (or Paper-Plastic) Dielectric, (Hermetically Sealed in Metal Cases), Style CQ72
    Dated: 01 October 2008
    File name: prf19978ss3.pdf, File Size: 226 kb

  • MIL-PRF-19978/5B 
  • Capacitors, Fixed, Plastic Dielectric, (Hermetically Sealed in Metal Cases), Styles CQ06 and CQ07
    Dated: 27 May 1999
    File name: prf19978ss5.pdf, File Size: 46 kb

  • MIL-PRF-19978/5B Notice 1 
  • Capacitors, Fixed, Plastic Dielectric, (Hermetically Sealed in Metal Cases), Styles CQ06 and CQ07
    Dated: 03 January 2002
    File name: prf19978ss5not1.pdf, File Size: 6 kb

  • MIL-PRF-19978/8A Notice 1 
  • MIL-PRF-19978/8A, Dated 27 May 1999, Is Hereby Cancelled. Possible Replacements May Be Found in MIL-PRF-19978/22.
    Dated: 10 May 2005
    File name: prf19978ss8not1.pdf, File Size: 21 kb

  • MIL-PRF-19978/9C w/Amendment 1 
  • Capacitors, Fixed, Plastic (or Paper-Plastic) Dielectric, Axial-Wire Terminal, Tubular (Insulated) (Hermetically Sealed in Metal Cases), Established Reliability, Style CQR09
    Dated: 11 March 2004
    File name: prf19978ss9am1.pdf, File Size: 37 kb

  • MIL-PRF-19978/10B w/Amendment 1 
  • Capacitors, Fixed, Plastic (or Paper-Plastic) Dielectric, Axial-Wire Terminal, Tangential Retainer, Tubular (Uninsulated) (Hermetically Sealed in Metal Cases), Established Reliability, Style CQR12
    Dated: 25 March 2004
    File name: prf19978ss10am1.pdf, File Size: 36 kb

  • MIL-PRF-19978/11C 
  • Capacitors, Fixed, Plastic (or Paper-Plastic) Dielectric, Axial-Wire Terminal-Stud Retainer, Tubular (Uninsulated) (Hermetically Sealed in Metal Cases), Established Reliability, Style CQR13
    Dated: 26 March 2009
    File name: prf19978ss11.pdf, File Size: 42 kb

  • MIL-C-19978/12B Notice 1 
  • Capacitors, Fixed, Plastic (or Paper-Plastic) Dielectric, Axial-Wire Terminal, Tubular (Uninsulated) (Hermetically Sealed in Metal Cases), Established Reliability, Style CQR19 (Validation Notice)
    Dated: 19 August 2011
    File name: mil19978ss12not2.pdf, File Size: 2 kb

  • MIL-PRF-19978/13C 
  • Capacitors, Fixed, Plastic Dielectric, Axial-Wire Terminal, Tubular (Insulated) (Hermetically Sealed in Metal Cases), Established Reliability, Style CQR29
    Dated: 07 December 2012
    File name: prf19978ss13.pdf, File Size: 177 kb

  • MIL-PRF-19978/14A w/Amendment 1 
  • Capacitors, Fixed, Plastic Dielectric, Axial-Wire Terminal, Tangential Retainer, Tubular (Uninsulated) (Hermetically Sealed in Metal Cases), Established Reliability, Style CQR32
    Dated: 11 March 2004
    File name: prf19978ss14am1.pdf, File Size: 44 kb

  • MIL-PRF-19978/15A w/Amendment 1 
  • Capacitors, Fixed, Plastic Dielectric, Axial-Wire Terminal, Threaded-Stud Retainer, Tubular (Uninsulated) (Hermetically Sealed in Metal Cases), Established Reliability, Style CQR33
    Dated: 11 March 2004
    File name: prf19978ss15am1.pdf, File Size: 40 kb

  • MIL-C-19978/16B 
  • Capacitors, Fixed, Plastic (or Paper-Plastic) Dielectric, Axial-Wire Terminal, Tubular (Insulated) (Hermetically Sealed in Metal Cases), Established Reliability, Style CQR39
    Dated: 18 June 2001
    File name: mil19978ss16.pdf, File Size: 60 kb

  • MIL-C-19978/16B Notice 1 
  • Capacitors, Fixed, Plastic (or Paper-Plastic) Dielectric, Axial-Wire Terminal, Tubular (Insulated) (Hermetically Sealed in Metal Cases), Established Reliability, Style CQR39 (Validation Notice)
    Dated: 19 August 2011
    File name: mil19978ss16not2.pdf, File Size: 2 kb

  • MIL-C-19978/17B 
  • Capacitors, Fixed, Plastic (or Paper-Plastic) Dielectric, Axial-Wire Terminal, Tangential Retainer, Tubular (Uninsulated) (Hermetically Sealed in Metal Cases), Established Reliability, Style CQR42
    Dated: 18 June 2001
    File name: mil19978ss17.pdf, File Size: 60 kb

  • MIL-C-19978/17B Notice 1 
  • Capacitors, Fixed, Plastic (or Paper-Plastic) Dielectric, Axial-Wire Terminal, Tangential Retainer, Tubular (Uninsulated) (Hermetically Sealed in Metal Cases), Established Reliability, Style CQR42 (Validation Notice)
    Dated: 19 August 2011
    File name: mil19978ss17not2.pdf, File Size: 2 kb

  • MIL-C-19978/18B 
  • Capacitors, Fixed, Plastic (or Paper-Plastic) Dielectric, Axial-Wire Terminal, Threaded-Stud Retainer, Tubular (Uninsulated) (Hermetically Sealed in Metallic Cases), Established Reliability, Style CQR43
    Dated: 18 June 2001
    File name: mil19978ss18.pdf, File Size: 47 kb

  • MIL-C-19978/18B Notice 1 
  • Capacitors, Fixed, Plastic (or Paper-Plastic) Dielectric, Axial-Wire Terminal, Threaded-Stud Retainer, Tubular (Uninsulated) (Hermetically Sealed in Metallic Cases), Established Reliability, Style CQR43 (Validation Notice)
    Dated: 19 August 2011
    File name: mil19978ss18not2.pdf, File Size: 2 kb

  • MIL-C-19978/19C 
  • Capacitors, Fixed, Plastic (or Paper-Plastic) Dielectric, Axial-Wire Terminal, Tubular (Insulated) (Hermetically Sealed in Metal Cases), Style CQ05
    Dated: 18 June 2001
    File name: mil19978ss19.pdf, File Size: 50 kb

  • MIL-C-19978/19C Notice 1 
  • Capacitors, Fixed, Plastic (or Paper-Plastic) Dielectric, Axial-Wire Terminal, Tubular (Insulated) (Hermetically Sealed in Metal Cases), Style CQ05 (Validation Notice)
    Dated: 19 August 2011
    File name: mil19978ss19not2.pdf, File Size: 2 kb

  • MIL-C-19978/20A 
  • Capacitors, Fixed, Plastic (or Paper-Plastic) Dielectric, Axial-Wire Terminal, Tangential Retainer, Tubular (Uninsulated), (Hermetically Sealed in Metal Cases), Style CQ10
    Dated: 18 June 2001
    File name: mil19978ss20.pdf, File Size: 44 kb

  • MIL-C-19978/20A Notice 1 
  • Capacitors, Fixed, Plastic (or Paper-Plastic) Dielectric, Axial-Wire Terminal, Tangential Retainer, Tubular (Uninsulated), (Hermetically Sealed in Metal Cases), Style CQ10 (Validation Notice)
    Dated: 19 August 2011
    File name: mil19978ss20not2.pdf, File Size: 2 kb

  • MIL-C-19978/21A 
  • Capacitors, Fixed, Plastic (or Paper-Plastic) Dielectric, Axial-Wire Terminal, Threaded-Stud Retainer, Tubular (Uninsulated), (Hermetically Sealed in Metal Cases), Style CQ11
    Dated: 18 June 2001
    File name: mil19978ss21.pdf, File Size: 35 kb

  • MIL-C-19978/21A Notice 1 
  • Capacitors, Fixed, Plastic (or Paper-Plastic) Dielectric, Axial-Wire Terminal, Threaded-Stud Retainer, Tubular (Uninsulated), (Hermetically Sealed in Metal Cases), Style CQ11 (Validation Notice)
    Dated: 19 August 2011
    File name: mil19978ss21not2.pdf, File Size: 2 kb

  • MIL-PRF-19978/22B 
  • Capacitors, Fixed, Plastic Dielectric, Axial-Wire Terminal, Tubular (Insulated) (Hermetically Sealed in Metal Cases), Established Reliability, Style CQR44
    Dated: 26 March 2009
    File name: prf19978ss22.pdf, File Size: 53 kb


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