PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

39661Transistor

Renesas Electronics America Inc · NSN 5961-00-421-8942 · FSC 5961 · No Item Name Available
Verified by PartsTable
NSN 5961-00-421-8942 — this item is cataloged by the U.S. Government under National Stock Number 5961-00-421-8942. Primary manufacturer part number: 39661.
Features
  • Transistor — FSC 5961
  • Maximum Operating Temp Per Measurement Point: 200.0 CELSIUS JUNCTION DEGC
  • Semiconductor Material: SILICON
  • Joint Electronic Device Engineering Council/jedec/case Outline Designation: TO-66
  • Overall Diameter: 0.500 INCHES MAXIMUM IN
  • Voltage Rating in Volts Per Characteristic: 120.0 MAXIMUM COLLECTOR TO BASE VOLTAGE/STATIC/EMITTER OPEN AND 90.0 MAXIMUM COLLECTOR TO EMITTER REVERSE VOLTAGE AND 75.0 MAXIMUM COLLECTOR TO EMITTER VOLTAGE/STATIC/BASE OPEN AND 7.0 MAXIMUM EMITTER TO BASE VOLTAGE, STATIC, COLLECTOR OPEN
  • Internal Configuration: JUNCTION CONTACT
  • Mounting Method: UNTHREADED HOLE(S)
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transistor, cataloged under National Stock Number 5961-00-421-8942, 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 Renesas Electronics America Inc. Government technical data includes 13 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5961-00-421-8942
Primary Part Number39661
Item NameTransistor
FSC / FSG5961 / 59 — No Item Name Available
ManufacturerRenesas Electronics America Inc
StatusACTIVE
Maximum Operating Temp Per Measurement Point200.0 CELSIUS JUNCTION DEGC
Semiconductor MaterialSILICON
Joint Electronic Device Engineering Council/jedec/case Outline DesignationTO-66
Overall Diameter0.500 INCHES MAXIMUM IN
Voltage Rating in Volts Per Characteristic120.0 MAXIMUM COLLECTOR TO BASE VOLTAGE/STATIC/EMITTER OPEN AND 90.0 MAXIMUM COLLECTOR TO EMITTER REVERSE VOLTAGE AND 75.0 MAXIMUM COLLECTOR TO EMITTER VOLTAGE/STATIC/BASE OPEN AND 7.0 MAXIMUM EMITTER TO BASE VOLTAGE, STATIC, COLLECTOR OPEN
Internal ConfigurationJUNCTION CONTACT
Mounting MethodUNTHREADED HOLE(S)
Features ProvidedHERMETICALLY SEALED CASE
Terminal Type and Quantity2 PIN AND 1 CASE
Electrode Internally-Electrically Connected to CaseCOLLECTOR
Current Rating Per Characteristic7.00 AMPERES MAXIMUM COLLECTOR CURRENT, DC AND 5.00 AMPERES MAXIMUM BASE CURRENT, DC
Mounting Facility Quantity2
Power Rating Per Characteristic35.0 WATTS MAXIMUM TOTAL POWER DISSIPATION
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
5306-00-248-5871MS9532-12 INTERCHANGEABLE
Bolt,machine
Sae International Dba Sae International
4330-00-350-89271021-3172 INTERCHANGEABLE
Adapter,fluid Filter
Hatch & Kirk, Inc.
5330-00-399-429239661 INTERCHANGEABLE
Gasket
The Oilgear Company Dba Jiffy Lube 213 Div Oilgear
5950-00-647-5510966463 INTERCHANGEABLE
Transformer,power
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5950-00-648-18917605347 INTERCHANGEABLE
Reactor
Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate
5330-00-737-2855 INTERCHANGEABLE
Gasket
6130-00-880-600023131 INTERCHANGEABLE
Power Supply
Ducommun Labarge Technologies, Inc Dba Ducommun Labarge Technologies, Inc
4820-01-193-347114087 INTERCHANGEABLE
Crosshead,valve
Leslie Controls, Inc. Dba Leslie Controls Inc
5330-01-234-7703 INTERCHANGEABLE
Gasket and Preformed Packing Set
5315-01-468-950023131F INTERCHANGEABLE
Pin,straight,headed
Spirax Sarco Inc Dba Spirax Sarco
Cross-Reference Index
Part NumberManufacturer
39661 Renesas Electronics America Inc (USA)
39661 Entwistle Co the Aimco Div (USA)
23131 Bae Systems Information and Electronic Systems Integration Inc. (USA)
23131 Trio Laboratories Inc (USA)
Related Parts
5306-00-248-5871INTERCHANGEABLE
BOLT,MACHINE
MS9532-12
4330-00-350-8927INTERCHANGEABLE
ADAPTER,FLUID FILTER
1021-3172
5330-00-399-4292INTERCHANGEABLE
GASKET
39661
5950-00-647-5510INTERCHANGEABLE
TRANSFORMER,POWER
966463
5950-00-648-1891INTERCHANGEABLE
REACTOR
7605347
5330-00-737-2855INTERCHANGEABLE
GASKET
6130-00-880-6000INTERCHANGEABLE
POWER SUPPLY
23131
4820-01-193-3471INTERCHANGEABLE
CROSSHEAD,VALVE
14087
5330-01-234-7703INTERCHANGEABLE
GASKET AND PREFORMED PACKING SET
5315-01-468-9500INTERCHANGEABLE
PIN,STRAIGHT,HEADED
23131F
5365-01-470-7008INTERCHANGEABLE
SPACER,RING
39661

Frequently Asked Questions

What is NSN 5961-00-421-8942?

NSN 5961-00-421-8942 is a Transistor, manufactured by Renesas Electronics America Inc, classified under FSC 5961 (No Item Name Available). Status: active.

What are the part numbers for NSN 5961-00-421-8942?

NSN 5961-00-421-8942 has 4 cross-referenced part numbers: 39661 (Renesas Electronics America Inc), 39661 (Entwistle Co the Aimco Div), 23131 (Bae Systems Information and Electronic Systems Integration Inc.), 23131 (Trio Laboratories Inc).

What NSN replaces 5961-00-421-8942?

There are 11 known substitutes for 5961-00-421-8942: 5306-00-248-5871, 4330-00-350-8927, 5330-00-399-4292 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 39661?

Key specifications for 39661: Maximum Operating Temp Per Measurement Point: 200.0 CELSIUS JUNCTION DEGC; Special Features: JUNCTION PATTERN ARRANGEMENT: NPN; Semiconductor Material: SILICON; Joint Electronic Device Engineering Council/jedec/case Outline Designation: TO-66. 15 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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