PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

2N4949Transistor

Microsemi Corp - Massachusetts · NSN 5961-00-497-0988 · FSC 5961 · No Item Name Available
Verified by PartsTable
NSN 5961-00-497-0988 — this item is cataloged by the U.S. Government under National Stock Number 5961-00-497-0988. Primary manufacturer part number: 2N4949.
Features
  • Transistor — FSC 5961
  • Overall Diameter: 0.209 INCHES MINIMUM AND 0.230 INCHES MAXIMUM IN
  • Mounting Method: TERMINAL
  • Specification/standard Data: 81349-MIL-S-19500/388 GOVERNMENT SPECIFICATION
  • Current Rating Per Characteristic: 50.00 MILLIAMPERES MAXIMUM EMITTER CURRENT, DC
  • 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.).
  • Internal Configuration: UNIJUNCTION
  • Terminal Length: 0.500 INCHES MINIMUM IN
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transistor, cataloged under National Stock Number 5961-00-497-0988, 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 Microsemi Corp - Massachusetts. Government technical data includes 14 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 9 commercial cross-references from 8 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5961-00-497-0988
Primary Part Number2N4949
Item NameTransistor
FSC / FSG5961 / 59 — No Item Name Available
ManufacturerMicrosemi Corp - Massachusetts
StatusCANCELLED
Overall Diameter0.209 INCHES MINIMUM AND 0.230 INCHES MAXIMUM IN
Mounting MethodTERMINAL
Specification/standard Data81349-MIL-S-19500/388 GOVERNMENT SPECIFICATION
Current Rating Per Characteristic50.00 MILLIAMPERES MAXIMUM EMITTER CURRENT, DC
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.).
Internal ConfigurationUNIJUNCTION
Terminal Length0.500 INCHES MINIMUM IN
Features ProvidedHERMETICALLY SEALED CASE
Terminal Circle Diameter0.100 INCHES NOMINAL IN
Voltage Rating in Volts Per Characteristic30.0 MAXIMUM BASE TO EMITTER SATURATION VOLTAGE
Electrode Internally-Electrically Connected to CaseBASE 2
Semiconductor MaterialSILICON
Power Rating Per Characteristic360.0 MILLIWATTS MAXIMUM TOTAL POWER DISSIPATION
Terminal Type and Quantity3 UNINSULATED WIRE LEAD
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 2
5961-00-761-45042N4949HR INTERCHANGEABLE
Transistor
Digitron Electronic Corp
5961-00-836-6663 INTERCHANGEABLE
Transistor
Cross-Reference Index
Part NumberManufacturer
200778-006 Bae Systems Information and Electronic Systems Integration Inc. Dba Bae Systems (USA)
352-7500-571 Rockwell Collins, Inc. Div Collins Aerospace - Mission Systems (USA)
352-7500-571 Freescale Semiconductor, Inc. (USA)
352-7500-571 Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems (USA)
2N4949 PRIMARY Microsemi Corp - Massachusetts (USA)
5961PL0975956 Jednolity Indeks Materialowy - Uniform Material Index (POL)
352+7500+131 Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems (USA)
JANTX2N4949 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
JANTX2N4949A Adelco Elektronik Gmbh (DEU)
Related Parts
5961-00-761-4504INTERCHANGEABLE
TRANSISTOR
2N4949HR
5961-00-836-6663INTERCHANGEABLE
TRANSISTOR

Frequently Asked Questions

What is NSN 5961-00-497-0988?

NSN 5961-00-497-0988 is a Transistor, manufactured by Microsemi Corp - Massachusetts, classified under FSC 5961 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5961-00-497-0988?

NSN 5961-00-497-0988 has 9 cross-referenced part numbers: 200778-006 (Bae Systems Information and Electronic Systems Integration Inc. Dba Bae Systems), 352-7500-571 (Rockwell Collins, Inc. Div Collins Aerospace - Mission Systems), 352-7500-571 (Freescale Semiconductor, Inc.), 352-7500-571 (Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems), 2N4949 (Microsemi Corp - Massachusetts) and 4 more.

What NSN replaces 5961-00-497-0988?

There are 2 known substitutes for 5961-00-497-0988: 5961-00-761-4504, 5961-00-836-6663. Verify interchangeability with system specifications before substitution.

What are the specifications of 2N4949?

Key specifications for 2N4949: Overall Diameter: 0.209 INCHES MINIMUM AND 0.230 INCHES MAXIMUM IN; Mounting Method: TERMINAL; Specification/standard Data: 81349-MIL-S-19500/388 GOVERNMENT SPECIFICATION; Current Rating Per Characteristic: 50.00 MILLIAMPERES MAXIMUM EMITTER CURRENT, DC. 16 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5961-00-497-0988 still in active supply?

NSN 5961-00-497-0988 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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