PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

FD6666Semiconductor Device Set

Fairchild Semiconductor Corp · NSN 5961-01-103-5131 · FSC 5961 · No Item Name Available
Verified by PartsTable
NSN 5961-01-103-5131 — this item is cataloged by the U.S. Government under National Stock Number 5961-01-103-5131. Primary manufacturer part number: FD6666.
Features
  • Semiconductor Device Set — FSC 5961
  • Terminal Length: 1.000 INCHES MINIMUM ALL SEMICONDUCTOR DEVICE DIODE IN
  • Semiconductor Material: SILICON ALL SEMICONDUCTOR DEVICE DIODE
  • Voltage Rating in Volts Per Characteristic: 75.0 MAXIMUM REPETITIVE PEAK REVERSE VOLTAGE ALL SEMICONDUCTOR DEVICE DIODE
  • Current Rating Per Characteristic: 200.00 MILLIAMPERES MAXIMUM AVERAGE FORWARD CURRENT AVERAGED OVER A FULL 60-HZ CYCLE ALL SEMICONDUCTOR DEVICE DIODE
  • Component Function Relationship: MATCHED
  • Mounting Method: TERMINAL ALL SEMICONDUCTOR DEVICE DIODE
  • Overall Diameter: 0.085 INCHES MINIMUM AND 0.107 INCHES MAXIMUM ALL SEMICONDUCTOR DEVICE DIODE IN
Applications
  • Applications requiring Glass Enclosure All Semiconductor Device Diode construction
General Description

The Semiconductor Device Set, cataloged under National Stock Number 5961-01-103-5131, 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 Fairchild Semiconductor Corp. Government technical data includes 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, 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
NSN5961-01-103-5131
Primary Part NumberFD6666
Item NameSemiconductor Device Set
FSC / FSG5961 / 59 — No Item Name Available
ManufacturerFairchild Semiconductor Corp
StatusACTIVE
Terminal Length1.000 INCHES MINIMUM ALL SEMICONDUCTOR DEVICE DIODE IN
Semiconductor MaterialSILICON ALL SEMICONDUCTOR DEVICE DIODE
Voltage Rating in Volts Per Characteristic75.0 MAXIMUM REPETITIVE PEAK REVERSE VOLTAGE ALL SEMICONDUCTOR DEVICE DIODE
Current Rating Per Characteristic200.00 MILLIAMPERES MAXIMUM AVERAGE FORWARD CURRENT AVERAGED OVER A FULL 60-HZ CYCLE ALL SEMICONDUCTOR DEVICE DIODE
Component Function RelationshipMATCHED
Mounting MethodTERMINAL ALL SEMICONDUCTOR DEVICE DIODE
Overall Diameter0.085 INCHES MINIMUM AND 0.107 INCHES MAXIMUM ALL SEMICONDUCTOR DEVICE DIODE IN
Terminal Type and Quantity2 UNINSULATED WIRE LEAD ALL SEMICONDUCTOR DEVICE DIODE
MaterialGLASS ENCLOSURE ALL SEMICONDUCTOR DEVICE DIODE
Component Name and Quantity6 SEMICONDUCTOR DEVICE DIODE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
5961-00-225-8591471929 INTERCHANGEABLE
Semiconductor Device,diode
Sypris Electronics, Llc
Cross-Reference Index
Part NumberManufacturer
FD6666 Fairchild Semiconductor Corp (USA)
FD6666 Bae Systems Imaging Solutions Inc. (USA)
4898-00-0001 Wavetek U S Inc Div of Wavetek Corp (USA)
Related Parts
5961-00-225-8591INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
471929

Frequently Asked Questions

What is NSN 5961-01-103-5131?

NSN 5961-01-103-5131 is a Semiconductor Device Set, manufactured by Fairchild Semiconductor Corp, classified under FSC 5961 (No Item Name Available). Status: active.

What are the part numbers for NSN 5961-01-103-5131?

NSN 5961-01-103-5131 has 3 cross-referenced part numbers: FD6666 (Fairchild Semiconductor Corp), FD6666 (Bae Systems Imaging Solutions Inc.), 4898-00-0001 (Wavetek U S Inc Div of Wavetek Corp).

What NSN replaces 5961-01-103-5131?

There is 1 known substitute for 5961-01-103-5131: 5961-00-225-8591. Verify interchangeability with system specifications before substitution.

What are the specifications of FD6666?

Key specifications for FD6666: Terminal Length: 1.000 INCHES MINIMUM ALL SEMICONDUCTOR DEVICE DIODE IN; Semiconductor Material: SILICON ALL SEMICONDUCTOR DEVICE DIODE; Voltage Rating in Volts Per Characteristic: 75.0 MAXIMUM REPETITIVE PEAK REVERSE VOLTAGE ALL SEMICONDUCTOR DEVICE DIODE; Overall Length: 0.230 INCHES MINIMUM AND 0.300 INCHES MAXIMUM ALL SEMICONDUCTOR DEVICE DIODE IN. 11 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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