PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

2N3958Semiconductor Devices,unitized

Interfet Corporation · NSN 5961-00-139-3244 · FSC 5961 · No Item Name Available
Verified by PartsTable
NSN 5961-00-139-3244 — this item is cataloged by the U.S. Government under National Stock Number 5961-00-139-3244. Primary manufacturer part number: 2N3958.
Features
  • Semiconductor Devices,unitized — FSC 5961
  • Mounting Method: TERMINAL
  • Features Provided: HERMETICALLY SEALED CASE
  • Terminal Circle Diameter: 0.100 INCHES NOMINAL IN
  • Terminal Length: 0.500 INCHES MINIMUM IN
  • Joint Electronic Device Engineering Council/jedec/case Outline Designation: TO-71
  • Component Name and Quantity: 2 TRANSISTOR
  • Current Rating Per Characteristic: 50.00 MILLIAMPERES MAXIMUM GATE CURRENT ALL TRANSISTOR
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Semiconductor Devices,unitized, cataloged under National Stock Number 5961-00-139-3244, 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 Interfet Corporation. Government technical data includes 13 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 20 commercial cross-references from 16 manufacturers, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5961-00-139-3244
Primary Part Number2N3958
Item NameSemiconductor Devices,unitized
FSC / FSG5961 / 59 — No Item Name Available
ManufacturerInterfet Corporation
StatusCANCELLED
Mounting MethodTERMINAL
Features ProvidedHERMETICALLY SEALED CASE
Terminal Circle Diameter0.100 INCHES NOMINAL IN
Terminal Length0.500 INCHES MINIMUM IN
Joint Electronic Device Engineering Council/jedec/case Outline DesignationTO-71
Component Name and Quantity2 TRANSISTOR
Current Rating Per Characteristic50.00 MILLIAMPERES MAXIMUM GATE CURRENT ALL TRANSISTOR
Voltage Rating in Volts Per Characteristic50.0 MAXIMUM DRAIN TO GATE VOLTAGE AND 50.0 MAXIMUM DRAIN TO SOURCE VOLTAGE AND 50.0 MAXIMUM REVERSE GATE TO SOURCE VOLTAGE ALL TRANSISTOR
Semiconductor MaterialSILICON ALL TRANSISTOR
Terminal Type and Quantity6 UNINSULATED WIRE LEAD
Specification/standard Data80131-RELEASE 5157 PROFESSIONAL/INDUSTRIAL ASSOCIATION SPECIFICATION
Power Rating Per Characteristic500.0 MILLIWATTS MAXIMUM TOTAL POWER DISSIPATION ALL TRANSISTOR
Test Data Document80131-RELEASE 5157 STANDARD (INCLUDES INDUSTRY OR ASSOCIATION STANDARDS, INDIVIDUAL MANUFACTUREER STANDARDS, ETC.).
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 5
5961-00-106-1264 INTERCHANGEABLE
Transistor
5961-00-147-75492679043-5 INTERCHANGEABLE
Semiconductor Devices,unitized
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5961-00-436-1001 INTERCHANGEABLE
Semiconductor Devices,unitized
5961-00-465-4647 INTERCHANGEABLE
Semiconductor Devices,unitized
3110-00-857-3673 INTERCHANGEABLE
Bearing,ball,annular
Cross-Reference Index
Part NumberManufacturer
2N3958 Interfet Corporation (USA)
2N3958 Semitronics Corp (USA)
2N3958 Solitron Devices, Inc. (USA)
2N3958 Intersil Inc Sub of General Electric Co (USA)
E412 Siliconix Incorporated Div Siliconix (USA)
2N3958 Electronic Industries Association
RELEASE5157 Electronic Industries Association
DMS 91139B Dla Land and Maritime Dba Engineering and Technical Support Div Document Standardization Division (vendor Item Drawings) (USA)
2N3958 Siliconix Incorporated Div Siliconix (USA)
U412 Siliconix Incorporated Div Siliconix (USA)
2N3958 Harris Corp Semiconductor Sector (USA)
2N3958 Adelco Elektronik Gmbh (DEU)
2N3958 Freescale Semiconductor, Inc. (USA)
2N3958 Fairchild Semiconductor Corp (USA)
FM3958 National Semiconductor Corporation (USA)
2N3958 Kemet Electronics Corporation (USA)
153-0395 Autek Systems Corp (USA)
2N3958 Burns and Towne Inc (USA)
2N3958 Telcom Semiconductor Inc (USA)
2N3958A Adelco Elektronik Gmbh (DEU)
Related Parts
5961-00-106-1264INTERCHANGEABLE
TRANSISTOR
5961-00-147-7549INTERCHANGEABLE
SEMICONDUCTOR DEVICES,UNITIZED
2679043-5
5961-00-436-1001INTERCHANGEABLE
SEMICONDUCTOR DEVICES,UNITIZED
5961-00-465-4647INTERCHANGEABLE
SEMICONDUCTOR DEVICES,UNITIZED
3110-00-857-3673INTERCHANGEABLE
BEARING,BALL,ANNULAR

Frequently Asked Questions

What is NSN 5961-00-139-3244?

NSN 5961-00-139-3244 is a Semiconductor Devices,unitized, manufactured by Interfet Corporation, classified under FSC 5961 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5961-00-139-3244?

NSN 5961-00-139-3244 has 20 cross-referenced part numbers: 2N3958 (Interfet Corporation), 2N3958 (Semitronics Corp), 2N3958 (Solitron Devices, Inc.), 2N3958 (Intersil Inc Sub of General Electric Co), E412 (Siliconix Incorporated Div Siliconix) and 15 more.

What NSN replaces 5961-00-139-3244?

There are 5 known substitutes for 5961-00-139-3244: 5961-00-106-1264, 5961-00-147-7549, 5961-00-436-1001 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 2N3958?

Key specifications for 2N3958: Mounting Method: TERMINAL; Features Provided: HERMETICALLY SEALED CASE; Terminal Circle Diameter: 0.100 INCHES NOMINAL IN; Terminal Length: 0.500 INCHES MINIMUM IN. 15 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5961-00-139-3244 still in active supply?

NSN 5961-00-139-3244 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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