PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MIL-PRF-19500/526Transistor

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 5961-01-188-2591 · FSC 5961 · No Item Name Available
Verified by PartsTable
NSN 5961-01-188-2591 — this item is cataloged by the U.S. Government under National Stock Number 5961-01-188-2591. Primary manufacturer part number: MIL-PRF-19500/526.
Features
  • Transistor — FSC 5961
  • Mounting Facility Quantity: 2
  • Joint Electronic Device Engineering Council/jedec/case Outline Designation: TO-66
  • Mounting Method: UNTHREADED HOLE(S)
  • Current Rating Per Characteristic: 5.00 AMPERES MAXIMUM BASE CURRENT, DC AND 7.00 AMPERES MAXIMUM COLLECTOR CURRENT, DC
  • Transfer Ratio: 80.0 MAXIMUM STATIC FORWARD CURRENT TRANSFER RATIO, COMMON-EMITTER
  • Test Data Document: 81349-MIL-S-19500 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
  • Power Rating Per Characteristic: 35.0 WATTS MAXIMUM TOTAL POWER DISSIPATION
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transistor, cataloged under National Stock Number 5961-01-188-2591, is classified within Federal Supply Class 5961 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 15 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5961-01-188-2591
Primary Part NumberMIL-PRF-19500/526
Item NameTransistor
FSC / FSG5961 / 59 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
Mounting Facility Quantity2
Joint Electronic Device Engineering Council/jedec/case Outline DesignationTO-66
Mounting MethodUNTHREADED HOLE(S)
Current Rating Per Characteristic5.00 AMPERES MAXIMUM BASE CURRENT, DC AND 7.00 AMPERES MAXIMUM COLLECTOR CURRENT, DC
Transfer Ratio80.0 MAXIMUM STATIC FORWARD CURRENT TRANSFER RATIO, COMMON-EMITTER
Test Data Document81349-MIL-S-19500 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
Power Rating Per Characteristic35.0 WATTS MAXIMUM TOTAL POWER DISSIPATION
Electrode Internally-Electrically Connected to CaseCOLLECTOR
Internal ConfigurationJUNCTION CONTACT
Voltage Rating in Volts Per Characteristic120.0 MAXIMUM COLLECTOR TO BASE VOLTAGE/STATIC/EMITTER OPEN AND 75.0 MAXIMUM COLLECTOR TO EMITTER VOLTAGE/STATIC/BASE OPEN AND 7.0 MAXIMUM EMITTER TO BASE VOLTAGE, STATIC, COLLECTOR OPEN
Maximum Operating Temp Per Measurement Point200.0 CELSIUS AMBIENT AIR DEGC
Features ProvidedHERMETICALLY SEALED CASE AND QUALITY ASSURANCE LEVEL TXV
Terminal Type and Quantity2 PIN AND 1 CASE
Specification/standard Data81349-MIL-S-19500/526 GOVERNMENT SPECIFICATION
Semiconductor MaterialSILICON
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5961-01-065-0017 INTERCHANGEABLE
Transistor
5961-01-082-8807 INTERCHANGEABLE
Transistor
Cross-Reference Index
Part NumberManufacturer
MIL-PRF-19500/526 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
JANTXV2N3879 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-S-19500/526 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5961-01-065-0017INTERCHANGEABLE
TRANSISTOR
5961-01-082-8807INTERCHANGEABLE
TRANSISTOR

Frequently Asked Questions

What is NSN 5961-01-188-2591?

NSN 5961-01-188-2591 is a Transistor, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 5961 (No Item Name Available). Status: active.

What are the part numbers for NSN 5961-01-188-2591?

NSN 5961-01-188-2591 has 3 cross-referenced part numbers: MIL-PRF-19500/526 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), JANTXV2N3879 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-S-19500/526 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 5961-01-188-2591?

There are 2 known substitutes for 5961-01-188-2591: 5961-01-065-0017, 5961-01-082-8807. Verify interchangeability with system specifications before substitution.

What are the specifications of MIL-PRF-19500/526?

Key specifications for MIL-PRF-19500/526: Mounting Facility Quantity: 2; Joint Electronic Device Engineering Council/jedec/case Outline Designation: TO-66; Mounting Method: UNTHREADED HOLE(S); Current Rating Per Characteristic: 5.00 AMPERES MAXIMUM BASE CURRENT, DC AND 7.00 AMPERES MAXIMUM COLLECTOR CURRENT, DC. 19 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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