PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

FTS5551Transistor

Fairchild Semiconductor Corp · NSN 5961-01-051-8607 · FSC 5961 · No Item Name Available
Verified by PartsTable
NSN 5961-01-051-8607 — this item is cataloged by the U.S. Government under National Stock Number 5961-01-051-8607. Primary manufacturer part number: FTS5551.
Features
  • Transistor — FSC 5961
  • Material: PLASTIC ENCLOSURE
  • Current Rating Per Characteristic: 600.00 MILLIAMPERES MAXIMUM COLLECTOR CURRENT, DC
  • Terminal Type and Quantity: 3 UNINSULATED WIRE LEAD
  • Joint Electronic Device Engineering Council/jedec/case Outline Designation: TO-92
  • Semiconductor Material: SILICON
  • Mounting Method: TERMINAL
  • Electrode Internally-Electrically Connected to Case: COLLECTOR
Applications
  • Applications requiring Plastic Enclosure construction
General Description

The Transistor, cataloged under National Stock Number 5961-01-051-8607, 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 Fairchild Semiconductor Corp. Government technical data includes 13 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. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5961-01-051-8607
Primary Part NumberFTS5551
Item NameTransistor
FSC / FSG5961 / 59 — No Item Name Available
ManufacturerFairchild Semiconductor Corp
StatusACTIVE
MaterialPLASTIC ENCLOSURE
Current Rating Per Characteristic600.00 MILLIAMPERES MAXIMUM COLLECTOR CURRENT, DC
Terminal Type and Quantity3 UNINSULATED WIRE LEAD
Joint Electronic Device Engineering Council/jedec/case Outline DesignationTO-92
Semiconductor MaterialSILICON
Mounting MethodTERMINAL
Electrode Internally-Electrically Connected to CaseCOLLECTOR
Terminal Circle Diameter0.105 INCHES MAXIMUM IN
Terminal Length0.500 INCHES MINIMUM IN
Power Rating Per Characteristic350.0 MILLIWATTS MAXIMUM TOTAL POWER DISSIPATION
Internal ConfigurationJUNCTION CONTACT
Voltage Rating in Volts Per Characteristic160.0 MAXIMUM COLLECTOR TO EMITTER REVERSE VOLTAGE
Maximum Operating Temp Per Measurement Point200.0 CELSIUS JUNCTION DEGC
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
3455-00-517-555458-10138 INTERCHANGEABLE
Cutter,milling,side
Union Butterfield Corp P O Box 9000 Crystal Lake Il 60039
5845-00-860-11034513-1 INTERCHANGEABLE
Gear Assembly,drum
Lockheed Martin Corporation Div Rms
5360-01-172-649145131 INTERCHANGEABLE
Spring,helical,compression
Terex Reedrill Dba Reedrill Texoma Div Terex Mining
5342-01-236-7428 INTERCHANGEABLE
Rod
6220-01-323-927545131 INTERCHANGEABLE
Light,indicator
Streamlight Inc Dba Streamlight Inc
5330-01-450-6775770044000870 INTERCHANGEABLE
Gasket
Deutz Corporation
6150-01-491-437345131 INTERCHANGEABLE
Cable Assembly,power,electrical
Rockwell Automation Entek Dba Entek Ird International Corp
Cross-Reference Index
Part NumberManufacturer
FTS5551 Fairchild Semiconductor Corp (USA)
45131 Omega Engineering, Inc. Dba Newport Electronics Div Electronics (USA)
Related Parts
3455-00-517-5554INTERCHANGEABLE
CUTTER,MILLING,SIDE
58-10138
5845-00-860-1103INTERCHANGEABLE
GEAR ASSEMBLY,DRUM
4513-1
5360-01-172-6491INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
45131
5342-01-236-7428INTERCHANGEABLE
ROD
6220-01-323-9275INTERCHANGEABLE
LIGHT,INDICATOR
45131
5330-01-450-6775INTERCHANGEABLE
GASKET
770044000870
6150-01-491-4373INTERCHANGEABLE
CABLE ASSEMBLY,POWER,ELECTRICAL
45131

Frequently Asked Questions

What is NSN 5961-01-051-8607?

NSN 5961-01-051-8607 is a Transistor, manufactured by Fairchild Semiconductor Corp, classified under FSC 5961 (No Item Name Available). Status: active.

What are the part numbers for NSN 5961-01-051-8607?

NSN 5961-01-051-8607 has 2 cross-referenced part numbers: FTS5551 (Fairchild Semiconductor Corp), 45131 (Omega Engineering, Inc. Dba Newport Electronics Div Electronics).

What NSN replaces 5961-01-051-8607?

There are 7 known substitutes for 5961-01-051-8607: 3455-00-517-5554, 5845-00-860-1103, 5360-01-172-6491 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of FTS5551?

Key specifications for FTS5551: Material: PLASTIC ENCLOSURE; Current Rating Per Characteristic: 600.00 MILLIAMPERES MAXIMUM COLLECTOR CURRENT, DC; Terminal Type and Quantity: 3 UNINSULATED WIRE LEAD; Joint Electronic Device Engineering Council/jedec/case Outline Designation: TO-92. 17 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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