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   Data updated: 24 Feb 2026. Home |  About Quick Search |  ASSIST |  ASSIST Updates Document Details
Document ID:   MIL-PRF-19500       Scroll down to access document images
Spec/Std Sheet:  426

Overview
Title:  Transistor, PNP, Silicon, Amplifier Type 2N4957, JAN, JANTX, JANTXV, JANS, JANHC, JANKC
Scope:  This specification covers the performance requirements for PNP silicon, VHF-UHF amplifier transistors. Four levels of product assurance are provided for each encapsulated device (JAN, JANTX, JANTXV, and JANS). Two levels of product assurance are provided for each unencapsulated die (JANHC and JANKC). Provisions for radiation hardness assurance (RHA) to eight radiation levels ("M", "D", "P", "L", "R", "F", "G" and "H") are provided for JANTXV, JANS, JANHC, and JANKC product assurance levels.
Status:  Active Document Date:  17-MAY-2024      
  Next Review Due:  16-MAY-2029
5961 Doc Category:   Performance Specification  
QPL/QML:  QML-19500-31 NOT 1

Responsibilities
Lead Standardization Activity:  CC  DLA Weapons Support (Columbus)  
  Preparing Activity: CC  DLA Weapons Support (Columbus)
Coordination:  Full  
Army Custodian:  CR   US Army Combat Capabilities Development Command, C5ISR Center  
Navy Custodian:  SH   Naval Sea Systems Command (Ship Systems)  
Air Force Custodian:  85   Air Force Life Cycle Management Center - Electronic Components, Wire and Ca  
DLA Custodian:  CC   DLA Weapons Support (Columbus)  
Other Custodian:  NA   National Aeronautics and Space Administration (NASA)  

Amendments to military specifications or specification sheets issued after August 1, 2003 are incorporated in the modified document.
Revision History Click on column headings for a description of column content.
MediaDocument Part DescriptionDist StmtDocument DatePagesSize
Document ImageRevision J Amendment 3 (all previous amendments incorporated)A17-MAY-202422392.1 KB
Document ImageRevision J Amendment 2 (all previous amendments incorporated)A11-JUL-202323402.2 KB
Document ImageRevision J Amendment 1 (amendment incorporated)A16-MAR-201821277.0 KB
Document ImageRevision J A22-NOV-201621330.1 KB
Document ImageRevision H A06-MAY-201419303.7 KB
Document ImageRevision G A30-MAR-201319307.1 KB
Document ImageRevision F A29-JUN-201119220.5 KB
Document ImageRevision E Notice 1 - ValidationA24-FEB-201012.0 KB
Document ImageRevision E A21-OCT-200418129.7 KB
Document ImageRevision D A28-DEC-20011695.5 KB
Document ImageRevision C A02-NOV-200016118.7 KB
Document ImageRevision B A12-DEC-199715205.9 KB
Document ImageRevision A Amendment 2 A28-DEC-1989162.7 KB
Document ImageRevision A A08-SEP-198617967.8 KB

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