PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

C668Transistor

Sonic Instruments Inc · NSN 5961-00-231-9771 · FSC 5961 · No Item Name Available
Verified by PartsTable
NSN 5961-00-231-9771 — this item is cataloged by the U.S. Government under National Stock Number 5961-00-231-9771. Primary manufacturer part number: C668.
Features
  • Transistor — FSC 5961
  • Power Rating Per Characteristic: 310.0 MILLIWATTS MAXIMUM TOTAL DEVICE DISSIPATION
  • Terminal Length: 0.400 INCHES MINIMUM IN
  • Voltage Rating in Volts Per Characteristic: 120.0 MAXIMUM COLLECTOR TO BASE VOLTAGE, DC AND 5.0 MAXIMUM EMITTER TO BASE VOLTAGE, DC
  • Overall Diameter: 0.375 INCHES MAXIMUM IN
  • Terminal Type and Quantity: 3 UNINSULATED WIRE LEAD
  • Mounting Method: TERMINAL
  • Terminal Circle Diameter: 0.200 INCHES NOMINAL IN
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transistor, cataloged under National Stock Number 5961-00-231-9771, 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 Sonic Instruments Inc. Government technical data includes 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5961-00-231-9771
Primary Part NumberC668
Item NameTransistor
FSC / FSG5961 / 59 — No Item Name Available
ManufacturerSonic Instruments Inc
StatusACTIVE
Power Rating Per Characteristic310.0 MILLIWATTS MAXIMUM TOTAL DEVICE DISSIPATION
Terminal Length0.400 INCHES MINIMUM IN
Voltage Rating in Volts Per Characteristic120.0 MAXIMUM COLLECTOR TO BASE VOLTAGE, DC AND 5.0 MAXIMUM EMITTER TO BASE VOLTAGE, DC
Overall Diameter0.375 INCHES MAXIMUM IN
Terminal Type and Quantity3 UNINSULATED WIRE LEAD
Mounting MethodTERMINAL
Terminal Circle Diameter0.200 INCHES NOMINAL IN
Semiconductor MaterialSILICON
Current Rating Per Characteristic10.00 MILLIAMPERES MAXIMUM COLLECTOR CURRENT, DC
Internal ConfigurationJUNCTION CONTACT
Maximum Operating Temp Per Measurement Point180.0 CELSIUS AMBIENT AIR DEGC
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
4940-01-274-9333F109-061 INTERCHANGEABLE
Holder,nozzle
Virgo Products Distribution Div Connie S. Trogdon
Cross-Reference Index
Part NumberManufacturer
C668 Sonic Instruments Inc (USA)
Related Parts
4940-01-274-9333INTERCHANGEABLE
HOLDER,NOZZLE
F109-061

Frequently Asked Questions

What is NSN 5961-00-231-9771?

NSN 5961-00-231-9771 is a Transistor, manufactured by Sonic Instruments Inc, classified under FSC 5961 (No Item Name Available). Status: active.

What are the part numbers for NSN 5961-00-231-9771?

NSN 5961-00-231-9771 has 1 cross-referenced part number: C668 (Sonic Instruments Inc).

What NSN replaces 5961-00-231-9771?

There is 1 known substitute for 5961-00-231-9771: 4940-01-274-9333. Verify interchangeability with system specifications before substitution.

What are the specifications of C668?

Key specifications for C668: Power Rating Per Characteristic: 310.0 MILLIWATTS MAXIMUM TOTAL DEVICE DISSIPATION; Terminal Length: 0.400 INCHES MINIMUM IN; Voltage Rating in Volts Per Characteristic: 120.0 MAXIMUM COLLECTOR TO BASE VOLTAGE, DC AND 5.0 MAXIMUM EMITTER TO BASE VOLTAGE, DC; Overall Diameter: 0.375 INCHES MAXIMUM IN. 13 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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