PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

125B403Transistor

Federal Signal International FSC Ltd Div Electrical Products · NSN 5961-00-907-0593 · FSC 5961 · No Item Name Available
Verified by PartsTable
NSN 5961-00-907-0593 — this item is cataloged by the U.S. Government under National Stock Number 5961-00-907-0593. Primary manufacturer part number: 125B403.
Features
  • Transistor — FSC 5961
  • Mounting Method: UNTHREADED HOLE(S)
  • Joint Electronic Device Engineering Council/jedec/case Outline Designation: T0-3
  • Semiconductor Material: SILICON
  • Terminal Type and Quantity: 2 PIN AND 1 CASE
  • Current Rating Per Characteristic: 20.00 MILLIAMPERES MAXIMUM COLLECTOR CURRENT, DC
  • Maximum Operating Temp Per Measurement Point: 70.0 CELSIUS AMBIENT AIR DEGC
  • Mounting Facility Quantity: 2
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transistor, cataloged under National Stock Number 5961-00-907-0593, 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 Federal Signal International FSC Ltd Div Electrical Products. Government technical data includes 13 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 7 commercial cross-references from 6 manufacturers, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5961-00-907-0593
Primary Part Number125B403
Item NameTransistor
FSC / FSG5961 / 59 — No Item Name Available
ManufacturerFederal Signal International FSC Ltd Div Electrical Products
StatusACTIVE
Mounting MethodUNTHREADED HOLE(S)
Joint Electronic Device Engineering Council/jedec/case Outline DesignationT0-3
Semiconductor MaterialSILICON
Terminal Type and Quantity2 PIN AND 1 CASE
Current Rating Per Characteristic20.00 MILLIAMPERES MAXIMUM COLLECTOR CURRENT, DC
Maximum Operating Temp Per Measurement Point70.0 CELSIUS AMBIENT AIR DEGC
Mounting Facility Quantity2
Electrode Internally-Electrically Connected to CaseCOLLECTOR
Transfer Ratio50.0 MINIMUM STATIC FORWARD CURRENT TRANSFER RATIO, COMMON-EMITTER
Voltage Rating in Volts Per Characteristic60.0 MINIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-BASE, EMITTER OPEN
Features ProvidedHERMETICALLY SEALED CASE
Internal ConfigurationJUNCTION CONTACT
Power Rating Per Characteristic90.0 WATTS MAXIMUM TOTAL POWER DISSIPATION
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
6760-00-141-6230 INTERCHANGEABLE
Lens,condenser,photographic
5330-00-420-4551125-403 INTERCHANGEABLE
Packing,preformed
Rix Industries
3120-01-285-1976 INTERCHANGEABLE
Bushing,sleeve
3120-01-548-5634 INTERCHANGEABLE
Bushing,sleeve
2090-01-626-5824217651 INTERCHANGEABLE
Seat Belt Assembly
Vigor Kvichak Llc
Cross-Reference Index
Part NumberManufacturer
125-403 Federal Signal International FSC Ltd Div Electrical Products (USA)
125B403-1 General Motors Corp Delco Electronics Div (USA)
125B403 PRIMARY Federal Signal International FSC Ltd Div Electrical Products (USA)
12A331 Avco Tulsa Operation (USA)
TS1199 General Electric Co Semi-Conductor Products Dept (USA)
125B403 Federal Signal Corporation (USA)
125B403 Freescale Semiconductor, Inc. (USA)
Related Parts
6760-00-141-6230INTERCHANGEABLE
LENS,CONDENSER,PHOTOGRAPHIC
5330-00-420-4551INTERCHANGEABLE
PACKING,PREFORMED
125-403
3120-01-285-1976INTERCHANGEABLE
BUSHING,SLEEVE
3120-01-548-5634INTERCHANGEABLE
BUSHING,SLEEVE
2090-01-626-5824INTERCHANGEABLE
SEAT BELT ASSEMBLY
217651

Frequently Asked Questions

What is NSN 5961-00-907-0593?

NSN 5961-00-907-0593 is a Transistor, manufactured by Federal Signal International FSC Ltd Div Electrical Products, classified under FSC 5961 (No Item Name Available). Status: active.

What are the part numbers for NSN 5961-00-907-0593?

NSN 5961-00-907-0593 has 7 cross-referenced part numbers: 125-403 (Federal Signal International FSC Ltd Div Electrical Products), 125B403-1 (General Motors Corp Delco Electronics Div), 125B403 (Federal Signal International FSC Ltd Div Electrical Products), 12A331 (Avco Tulsa Operation), TS1199 (General Electric Co Semi-Conductor Products Dept) and 2 more.

What NSN replaces 5961-00-907-0593?

There are 5 known substitutes for 5961-00-907-0593: 6760-00-141-6230, 5330-00-420-4551, 3120-01-285-1976 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 125B403?

Key specifications for 125B403: Mounting Method: UNTHREADED HOLE(S); Joint Electronic Device Engineering Council/jedec/case Outline Designation: T0-3; Semiconductor Material: SILICON; Terminal Type and Quantity: 2 PIN AND 1 CASE. 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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