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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 (w/Amendment 1) 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-YYYY Email: CapacitorFilter@dla.mil
Document Downloads

Capacitors, Fixed, Plastic (or Paper-Plastic) Dielectric (Hermetically Sealed in Metal, Ceramic or Glass Cases), Established and Non-Established Reliability General Specification for (w/Amendment 1) Revision: M, Dated: 16 June 2023 File Name: prf19978.pdf, File Size: 550 kb


List of MIL-PRF-19978M Associated Specifications
Dated: 16 June 2023
File name: prf19978sup1.pdf, File Size: 60 kb

Capacitors, Fixed, Plastic (or Paper-Plastic) Dielectric, (Hermetically Sealed in Metal Cases), Styles CQ08, CQ09, CQ12, and CQ13
Dated: 24 August 2026
File name: prf19978ss1.pdf, File Size: 902 kb

Capacitors, Fixed, Plastic (or Paper-Plastic) Dielectric, (Hermetically Sealed in Ceramic or Glass Cases), Style CQ20
Dated: 03 October 2022
File name: prf19978ss2.pdf, File Size: 166 kb

Capacitor, Fixed, Plastic (or Paper-Plastic) Dielectric, Hermetically Sealed in Metal Cases, Style CQ72
Dated: 30 November 2025
File name: prf19978ss3.pdf, File Size: 325 kb

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

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, Dated 27 May 1999, Is Hereby Cancelled. Possible Replacements May Be Found in <a>MIL-PRF-19978/22</a>.
Dated: 10 May 2005
File name: prf19978ss8not1.pdf, File Size: 21 kb

Capacitor, Fixed, Plastic (or Paper-Plastic) Dielectric, Axial-Wire Terminal, Tubular (Insulated) (Hermetically Sealed in Metal Cases), Established Reliability, Style CQR09
Dated: 19 May 2026
File name: prf19978ss9.pdf, File Size: 218 kb

Capacitor, Fixed, Plastic (or Paper-Plastic) Dielectric, Axial-Wire Terminal, Tangential Retainer, Tubular (Uninsulated) (Hermetically Sealed in Metal Cases), Established Reliability, Style CQR12
Dated: 19 May 2026
File name: prf19978ss10.pdf, File Size: 215 kb

Capacitor, Fixed, Plastic (or Paper-Plastic) Dielectric, Axial-Wire Terminal-Stud Retainer, Tubular (Uninsulated) (Hermetically Sealed in Metal Cases), Established Reliability, Style CQR13
Dated: 19 May 2026
File name: prf19978ss11.pdf, File Size: 195 kb

Capacitors, Fixed, Plastic (or Paper-Plastic) Dielectric, Axial-Wire Terminal, Tubular (Uninsulated) (Hermetically Sealed in Metal Case), Established Reliability, Style CQR19
Dated: 09 December 2021
File name: prf19978ss12.pdf, File Size: 117 kb

Capacitor, Fixed, Plastic Dielectric, Axial-Wire Terminal, Tubular (Insulated) (Hermetically Sealed in Metal Cases), Established Reliability, Style CQR29
Dated: 16 June 2023
File name: prf19978ss13.pdf, File Size: 220 kb

Capacitor, Fixed, Plastic Dielectric, Axial-Wire Terminal, Tangential Retainer, Tubular (Uninsulated) (Hermetically Sealed in Metal Cases), Established Reliability, Style CQR32
Dated: 19 May 2026
File name: prf19978ss14.pdf, File Size: 250 kb

Capacitor, Fixed, Plastic Dielectric, Axial-Wire Terminal, Threaded-Stud Retainer, Tubular (Uninsulated) (Hermetically Sealed in Metal Cases), Established Reliability, Style CQR33
Dated: 19 May 2026
File name: prf19978ss15.pdf, File Size: 221 kb

Capacitor, Fixed, Plastic (or Paper-Plastic) Dielectric, Axial-Wire Terminal, Tubular (Insulated) (Hermetically) Sealed in Metal Cases), Established Reliability, Style CQR39
Dated: 09 December 2021
File name: prf19978ss16.pdf, File Size: 199 kb

Capacitor, Fixed, Plastic (or Paper-Plastic) Dielectric, Axial-Wire Terminal, Tangential Retainer, Tubular (Uninsulated), (Hermetically Sealed in Metal Cases), Established Reliability, Style CQR42
Dated: 09 December 2021
File name: prf19978ss17.pdf, File Size: 199 kb

Capacitor, Fixed, Plastic (or Paper-Plastic) Dielectric, Axial-Wire Terminal, Threaded-Stud Retainer, Tubular (Uninsulated) Hermetically Sealed in Metal Cases), Established Reliability, Style CQR43
Dated: 09 December 2021
File name: prf19978ss18.pdf, File Size: 181 kb

Capacitor, Fixed, Plastic (or Paper-Plastic) Dielectric, Axial-Wire Terminal, Tubular (Insulated), (Hermetically Sealed in Metal Cases), Style CQ05
Dated: 09 December 2021
File name: prf19978ss19.pdf, File Size: 176 kb

Capacitor, Fixed, Plastic (or Paper-Plastic) Dielectric, Axial-Wire Terminal, Tangential Retainer, Tubular (Uninsulated), (Hermetically Sealed in Metal Cases), Style CQ10
Dated: 09 December 2021
File name: prf19978ss20.pdf, File Size: 152 kb

Capacitor, Fixed, Plastic (or Paper-Plastic) Dielectric, Axial-Wire Terminal, Tangential Retainer, Tubular (Uninsulated), (Hermetically Sealed in Metal Cases), Style CQ11
Dated: 09 December 2021
File name: prf19978ss21.pdf, File Size: 129 kb

Capacitors, Fixed, Plastic Dielectric, Axial-Wire Terminal, Tubular (Insulated) (Hermetically Sealed in Metal Cases), Established Reliability, Style CQR44
Dated: 24 August 2026
File name: prf19978ss22.pdf, File Size: 273 kb

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