PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

2N4123Transistor

On Semiconductor Corporation · NSN 5961-00-840-4826 · FSC 5961 · No Item Name Available
Verified by PartsTable
NSN 5961-00-840-4826 — this item is cataloged by the U.S. Government under National Stock Number 5961-00-840-4826. Primary manufacturer part number: 2N4123.
Features
  • Transistor — FSC 5961
  • Terminal Type and Quantity: 3 UNINSULATED WIRE LEAD
  • Power Rating Per Characteristic: 350.0 MILLIWATTS MAXIMUM COLLECTOR POWER DISSIPATION
  • Mounting Method: TERMINAL
  • Internal Configuration: JUNCTION CONTACT
  • Current Rating Per Characteristic: 200.00 MILLIAMPERES MAXIMUM COLLECTOR CURRENT, DC
  • Terminal Length: 0.500 INCHES MINIMUM IN
  • Specification/standard Data: 80131-RELEASE5306 PROFESSIONAL/INDUSTRIAL ASSOCIATION SPECIFICATION
Applications
  • Applications requiring Plastic Enclosure construction
General Description

The Transistor, cataloged under National Stock Number 5961-00-840-4826, 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 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 14 commercial cross-references from 12 manufacturers, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5961-00-840-4826
Primary Part Number2N4123
Item NameTransistor
FSC / FSG5961 / 59 — No Item Name Available
ManufacturerOn Semiconductor Corporation
StatusCANCELLED
Terminal Type and Quantity3 UNINSULATED WIRE LEAD
Power Rating Per Characteristic350.0 MILLIWATTS MAXIMUM COLLECTOR POWER DISSIPATION
Mounting MethodTERMINAL
Internal ConfigurationJUNCTION CONTACT
Current Rating Per Characteristic200.00 MILLIAMPERES MAXIMUM COLLECTOR CURRENT, DC
Terminal Length0.500 INCHES MINIMUM IN
Specification/standard Data80131-RELEASE5306 PROFESSIONAL/INDUSTRIAL ASSOCIATION SPECIFICATION
Semiconductor MaterialSILICON
Maximum Operating Temp Per Measurement Point165.0 CELSIUS JUNCTION DEGC
Voltage Rating in Volts Per Characteristic40.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-BASE, EMITTER OPEN AND 30.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-EMITTER, BASE OPEN AND 5.0 MAXIMUM BREAKDOWN VOLTAGE, EMITTER-TO-BASE, COLLECTOR OPEN
MaterialPLASTIC ENCLOSURE
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 7
5961-00-124-0113 INTERCHANGEABLE
Transistor
4920-00-144-5627804088 INTERCHANGEABLE
Collar,front and Re
Curtiss-Wright Controls, Inc. Div Actuation Division
5961-00-269-2242 INTERCHANGEABLE
Transistor
5961-00-422-3466 INTERCHANGEABLE
Transistor
5961-00-828-07232N4126 INTERCHANGEABLE
Transistor
Solitron Devices, Inc.
5961-01-110-6858 INTERCHANGEABLE
Transistor
5961-01-255-0064 INTERCHANGEABLE
Transistor
Cross-Reference Index
Part NumberManufacturer
2N4123 On Semiconductor Corporation (USA)
2N4123 Lacon Electronic Gmbh (DEU)
RELEASE5306 Electronic Industries Association
2N4123 Adelco Elektronik Gmbh (DEU)
7210064-008 Cohu, Inc. Dba Cohu Electronic's Division Div Electronics Division (USA)
8210-1123 Iet Labs Inc (USA)
7905212-025 Lockheed Martin Corp Dba Lockheed Martin Div Mst - Eagan (USA)
2N4123 Electronic Industries Association
2N4123 Freescale Semiconductor, Inc. (USA)
3-12501-207-1 Peripheral Dynamics, Inc (USA)
200-4123 Ddc Pertec Peripherals Corp (USA)
804088 Nai Technologies Inc (USA)
2N4123A Adelco Elektronik Gmbh (DEU)
8210-1123 Genrad Inc (USA)
Related Parts
5961-00-124-0113INTERCHANGEABLE
TRANSISTOR
4920-00-144-5627INTERCHANGEABLE
COLLAR,FRONT AND RE
804088
5961-00-269-2242INTERCHANGEABLE
TRANSISTOR
5961-00-422-3466INTERCHANGEABLE
TRANSISTOR
5961-00-828-0723INTERCHANGEABLE
TRANSISTOR
2N4126
5961-01-110-6858INTERCHANGEABLE
TRANSISTOR
5961-01-255-0064INTERCHANGEABLE
TRANSISTOR

Frequently Asked Questions

What is NSN 5961-00-840-4826?

NSN 5961-00-840-4826 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 5961-00-840-4826?

NSN 5961-00-840-4826 has 14 cross-referenced part numbers: 2N4123 (On Semiconductor Corporation), 2N4123 (Lacon Electronic Gmbh), RELEASE5306 (Electronic Industries Association), 2N4123 (Adelco Elektronik Gmbh), 7210064-008 (Cohu, Inc. Dba Cohu Electronic's Division Div Electronics Division) and 9 more.

What NSN replaces 5961-00-840-4826?

There are 7 known substitutes for 5961-00-840-4826: 5961-00-124-0113, 4920-00-144-5627, 5961-00-269-2242 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 2N4123?

Key specifications for 2N4123: Terminal Type and Quantity: 3 UNINSULATED WIRE LEAD; Power Rating Per Characteristic: 350.0 MILLIWATTS MAXIMUM COLLECTOR POWER DISSIPATION; Mounting Method: TERMINAL; Internal Configuration: JUNCTION CONTACT. 15 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5961-00-840-4826 still in active supply?

NSN 5961-00-840-4826 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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