PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

2N5551GTransistor

On Semiconductor Corporation · NSN 5961-00-858-6538 · FSC 5961 · No Item Name Available
Verified by PartsTable
NSN 5961-00-858-6538 — this item is cataloged by the U.S. Government under National Stock Number 5961-00-858-6538. Primary manufacturer part number: 2N5551G.
Features
  • Transistor — FSC 5961
  • Mounting Method: TERMINAL
  • Power Rating Per Characteristic: 35.0 MILLIWATTS MAXIMUM COLLECTOR POWER DISSIPATION
  • Terminal Length: 0.500 INCHES MINIMUM IN
  • Overall Diameter: 0.205 INCHES MAXIMUM IN
  • Maximum Operating Temp Per Measurement Point: 165.0 CELSIUS JUNCTION DEGC
  • Current Rating Per Characteristic: 600.00 MILLIAMPERES MAXIMUM COLLECTOR CURRENT, DC
  • Material: PLASTIC ENCLOSURE
Applications
  • Applications requiring Plastic Enclosure construction
General Description

The Transistor, cataloged under National Stock Number 5961-00-858-6538, 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 On Semiconductor Corporation. Government technical data includes 13 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 13 commercial cross-references from 10 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
NSN5961-00-858-6538
Primary Part Number2N5551G
Item NameTransistor
FSC / FSG5961 / 59 — No Item Name Available
ManufacturerOn Semiconductor Corporation
StatusCANCELLED
Mounting MethodTERMINAL
Power Rating Per Characteristic35.0 MILLIWATTS MAXIMUM COLLECTOR POWER DISSIPATION
Terminal Length0.500 INCHES MINIMUM IN
Overall Diameter0.205 INCHES MAXIMUM IN
Maximum Operating Temp Per Measurement Point165.0 CELSIUS JUNCTION DEGC
Current Rating Per Characteristic600.00 MILLIAMPERES MAXIMUM COLLECTOR CURRENT, DC
MaterialPLASTIC ENCLOSURE
Semiconductor MaterialSILICON
Features ProvidedHERMETICALLY SEALED CASE
Voltage Rating in Volts Per Characteristic180.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-BASE, EMITTER OPEN AND 160.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-EMITTER, BASE OPEN AND 6.0 MAXIMUM BREAKDOWN VOLTAGE, EMITTER-TO-BASE, COLLECTOR OPEN
Internal ConfigurationJUNCTION CONTACT
Terminal Type and Quantity3 UNINSULATED WIRE LEAD
Specification/standard Data80131-RELEASE5888 PROFESSIONAL/INDUSTRIAL ASSOCIATION SPECIFICATION
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 5
5960-00-061-1214 INTERCHANGEABLE
Electron Tube
5961-00-365-9935151-0347-00 INTERCHANGEABLE
Transistor
Tektronix, Inc.
5961-00-489-1451 INTERCHANGEABLE
Transistor
5961-00-762-8832 INTERCHANGEABLE
Transistor
3040-01-509-28267-0114-01 INTERCHANGEABLE
Shaft,shouldered
Air & Liquid Systems Corporation Dba Buffalo Pumps
Cross-Reference Index
Part NumberManufacturer
2N5551G On Semiconductor Corporation (USA)
2N5551 On Semiconductor Corporation (USA)
RELEASE5888 Electronic Industries Association
2N5551 Electronic Industries Association
V22916-X102-A26 Nokia Solutions and Networks Gmbh & Co. Kg (DEU)
701-1403 Thermo Orion Inc Div Thermo Fisher Scientific (USA)
2N5551 Freescale Semiconductor, Inc. (USA)
701-1401 Thermo Orion Inc Div Thermo Fisher Scientific (USA)
737017-01 Dage-Mti, Inc (USA)
2N5551 Texas Instruments Incorporated (USA)
150-555 Autek Systems Corp (USA)
150-555 Systron-Donner Corp Microwave/instrument Div (USA)
663-00136 Datron the Instruments Inc (USA)
Related Parts
5960-00-061-1214INTERCHANGEABLE
ELECTRON TUBE
5961-00-365-9935INTERCHANGEABLE
TRANSISTOR
151-0347-00
5961-00-489-1451INTERCHANGEABLE
TRANSISTOR
5961-00-762-8832INTERCHANGEABLE
TRANSISTOR
3040-01-509-2826INTERCHANGEABLE
SHAFT,SHOULDERED
7-0114-01

Frequently Asked Questions

What is NSN 5961-00-858-6538?

NSN 5961-00-858-6538 is a Transistor, manufactured by On Semiconductor Corporation, classified under FSC 5961 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5961-00-858-6538?

NSN 5961-00-858-6538 has 13 cross-referenced part numbers: 2N5551G (On Semiconductor Corporation), 2N5551 (On Semiconductor Corporation), RELEASE5888 (Electronic Industries Association), 2N5551 (Electronic Industries Association), V22916-X102-A26 (Nokia Solutions and Networks Gmbh & Co. Kg) and 8 more.

What NSN replaces 5961-00-858-6538?

There are 5 known substitutes for 5961-00-858-6538: 5960-00-061-1214, 5961-00-365-9935, 5961-00-489-1451 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 2N5551G?

Key specifications for 2N5551G: Mounting Method: TERMINAL; Power Rating Per Characteristic: 35.0 MILLIWATTS MAXIMUM COLLECTOR POWER DISSIPATION; Terminal Length: 0.500 INCHES MINIMUM IN; Overall Length: 0.188 INCHES NOMINAL IN. 15 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5961-00-858-6538 still in active supply?

NSN 5961-00-858-6538 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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