PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

2N343BTransistor

Semitronics Corp · NSN 5961-00-810-3955 · FSC 5961 · No Item Name Available
Verified by PartsTable
NSN 5961-00-810-3955 — this item is cataloged by the U.S. Government under National Stock Number 5961-00-810-3955. Primary manufacturer part number: 2N343B.
Features
  • Transistor — FSC 5961
  • Voltage Rating in Volts Per Characteristic: 65.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-BASE, EMITTER OPEN AND 65.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-EMITTER, BASE OPEN AND 2.0 MAXIMUM BREAKDOWN VOLTAGE, EMITTER-TO-BASE, COLLECTOR OPEN
  • Overall Diameter: 0.370 INCHES MAXIMUM IN
  • Mounting Method: TERMINAL
  • Terminal Circle Diameter: 0.203 INCHES NOMINAL IN
  • Power Rating Per Characteristic: 750.0 MILLIWATTS MAXIMUM COLLECTOR POWER DISSIPATION
  • Internal Configuration: JUNCTION CONTACT
  • Semiconductor Material: SILICON
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transistor, cataloged under National Stock Number 5961-00-810-3955, 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 Semitronics Corp. 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. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5961-00-810-3955
Primary Part Number2N343B
Item NameTransistor
FSC / FSG5961 / 59 — No Item Name Available
ManufacturerSemitronics Corp
StatusCANCELLED
Voltage Rating in Volts Per Characteristic65.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-BASE, EMITTER OPEN AND 65.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-EMITTER, BASE OPEN AND 2.0 MAXIMUM BREAKDOWN VOLTAGE, EMITTER-TO-BASE, COLLECTOR OPEN
Overall Diameter0.370 INCHES MAXIMUM IN
Mounting MethodTERMINAL
Terminal Circle Diameter0.203 INCHES NOMINAL IN
Power Rating Per Characteristic750.0 MILLIWATTS MAXIMUM COLLECTOR POWER DISSIPATION
Internal ConfigurationJUNCTION CONTACT
Semiconductor MaterialSILICON
Terminal Type and Quantity3 UNINSULATED WIRE LEAD
Maximum Operating Temp Per Measurement Point165.0 CELSIUS JUNCTION DEGC
Specification/standard Data80131-RELEASE2887 PROFESSIONAL/INDUSTRIAL ASSOCIATION SPECIFICATION
Features ProvidedHERMETICALLY SEALED CASE
Current Rating Per Characteristic60.00 AMPERES MAXIMUM COLLECTOR CURRENT, DC
Terminal Length0.500 INCHES MINIMUM IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 1
5961-00-851-8168 INTERCHANGEABLE
Transistor
Cross-Reference Index
Part NumberManufacturer
2N343B Semitronics Corp (USA)
10018944-002 Us Army Aviation and Missile Command (USA)
2N343B Electronic Industries Association
RELEASE2887 Electronic Industries Association
2N343B Solid State Devices, Inc (USA)
2N343B Texas Instruments Incorporated (USA)
2N343B Pd&e Electronics, Llc (USA)
Related Parts
5961-00-851-8168INTERCHANGEABLE
TRANSISTOR

Frequently Asked Questions

What is NSN 5961-00-810-3955?

NSN 5961-00-810-3955 is a Transistor, manufactured by Semitronics Corp, classified under FSC 5961 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5961-00-810-3955?

NSN 5961-00-810-3955 has 7 cross-referenced part numbers: 2N343B (Semitronics Corp), 10018944-002 (Us Army Aviation and Missile Command), 2N343B (Electronic Industries Association), RELEASE2887 (Electronic Industries Association), 2N343B (Solid State Devices, Inc) and 2 more.

What NSN replaces 5961-00-810-3955?

There is 1 known substitute for 5961-00-810-3955: 5961-00-851-8168. Verify interchangeability with system specifications before substitution.

What are the specifications of 2N343B?

Key specifications for 2N343B: Voltage Rating in Volts Per Characteristic: 65.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-BASE, EMITTER OPEN AND 65.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-EMITTER, BASE OPEN AND 2.0 MAXIMUM BREAKDOWN VOLTAGE, EMITTER-TO-BASE, COLLECTOR OPEN; Overall Diameter: 0.370 INCHES MAXIMUM IN; Mounting Method: TERMINAL; Terminal Circle Diameter: 0.203 INCHES NOMINAL IN. 15 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5961-00-810-3955 still in active supply?

NSN 5961-00-810-3955 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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