PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

2N5991Transistor

Freescale Semiconductor, Inc. · NSN 5961-01-169-6507 · FSC 5961 · No Item Name Available
Verified by PartsTable
NSN 5961-01-169-6507 — this item is cataloged by the U.S. Government under National Stock Number 5961-01-169-6507. Primary manufacturer part number: 2N5991.
Features
  • Transistor — FSC 5961
  • Terminal Type and Quantity: 3 PIN
  • Voltage Rating in Volts Per Characteristic: 80.0 MAXIMUM COLLECTOR TO EMITTER VOLTAGE/STATIC/BASE OPEN
  • Material: PLASTIC ENCLOSURE
  • Semiconductor Material: SILICON
  • Mounting Method: UNTHREADED HOLE(S)
  • Power Rating Per Characteristic: 100.0 WATTS MAXIMUM TOTAL DEVICE DISSIPATION
  • Maximum Operating Temp Per Measurement Point: 150.0 CELSIUS JUNCTION DEGC
Applications
  • Applications requiring Plastic Enclosure construction
General Description

The Transistor, cataloged under National Stock Number 5961-01-169-6507, 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 Freescale Semiconductor, Inc.. Government technical data includes 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5961-01-169-6507
Primary Part Number2N5991
Item NameTransistor
FSC / FSG5961 / 59 — No Item Name Available
ManufacturerFreescale Semiconductor, Inc.
StatusACTIVE
Terminal Type and Quantity3 PIN
Voltage Rating in Volts Per Characteristic80.0 MAXIMUM COLLECTOR TO EMITTER VOLTAGE/STATIC/BASE OPEN
MaterialPLASTIC ENCLOSURE
Semiconductor MaterialSILICON
Mounting MethodUNTHREADED HOLE(S)
Power Rating Per Characteristic100.0 WATTS MAXIMUM TOTAL DEVICE DISSIPATION
Maximum Operating Temp Per Measurement Point150.0 CELSIUS JUNCTION DEGC
Special Test FeaturesTESTED PER BASE TEN SYSTEMS DWG 21810
Mounting Facility Quantity1
Current Rating Per Characteristic4.00 AMPERES MAXIMUM BASE CURRENT, DC
Internal ConfigurationJUNCTION CONTACT
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
6685-00-143-4746PT109 INTERCHANGEABLE
Thermometer,self-Indicating
Sigma Products & Mfg
5325-00-818-252721810 INTERCHANGEABLE
Ring,retaining
Winchester Interconnect Corporation Dba Winchester Interconnect Div Winchester Interconnect
3110-01-007-762621810 INTERCHANGEABLE
Ball,bearing
Mason Electric Co. Dba Mason Controls
5985-01-036-6214218-10 INTERCHANGEABLE
Attenuator,fixed
Cinch Connectivity Solutions Inc
5310-01-049-0471NW21810 INTERCHANGEABLE
Nut,plain,wing
Tld Wollard Llc
5961-01-081-3430 INTERCHANGEABLE
Transistor
5950-01-210-106921810 INTERCHANGEABLE
Reactor
Westerbeke Corporation
4720-01-374-413621810 INTERCHANGEABLE
Hose,preformed
Gates Corporation
5945-01-499-851621-810 INTERCHANGEABLE
Relay,hybrid
Te Connectivity Corporation
Cross-Reference Index
Part NumberManufacturer
2N5991 Freescale Semiconductor, Inc. (USA)
21810 Smiths Aerospace, Inc., Electronic Systems-Grand Rapids (USA)
Related Parts
6685-00-143-4746INTERCHANGEABLE
THERMOMETER,SELF-INDICATING
PT109
5325-00-818-2527INTERCHANGEABLE
RING,RETAINING
21810
3110-01-007-7626INTERCHANGEABLE
BALL,BEARING
21810
5985-01-036-6214INTERCHANGEABLE
ATTENUATOR,FIXED
218-10
5310-01-049-0471INTERCHANGEABLE
NUT,PLAIN,WING
NW21810
5961-01-081-3430INTERCHANGEABLE
TRANSISTOR
5950-01-210-1069INTERCHANGEABLE
REACTOR
21810
4720-01-374-4136INTERCHANGEABLE
HOSE,PREFORMED
21810
5945-01-499-8516INTERCHANGEABLE
RELAY,HYBRID
21-810

Frequently Asked Questions

What is NSN 5961-01-169-6507?

NSN 5961-01-169-6507 is a Transistor, manufactured by Freescale Semiconductor, Inc., classified under FSC 5961 (No Item Name Available). Status: active.

What are the part numbers for NSN 5961-01-169-6507?

NSN 5961-01-169-6507 has 2 cross-referenced part numbers: 2N5991 (Freescale Semiconductor, Inc.), 21810 (Smiths Aerospace, Inc., Electronic Systems-Grand Rapids).

What NSN replaces 5961-01-169-6507?

There are 9 known substitutes for 5961-01-169-6507: 6685-00-143-4746, 5325-00-818-2527, 3110-01-007-7626 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 2N5991?

Key specifications for 2N5991: Terminal Type and Quantity: 3 PIN; Voltage Rating in Volts Per Characteristic: 80.0 MAXIMUM COLLECTOR TO EMITTER VOLTAGE/STATIC/BASE OPEN; Material: PLASTIC ENCLOSURE; Semiconductor Material: SILICON. 15 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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