PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1N3666Semiconductor Device,diode

Lacon Electronic Gmbh · NSN 5961-00-403-5457 · FSC 5961 · No Item Name Available
Verified by PartsTable
NSN 5961-00-403-5457 — this item is cataloged by the U.S. Government under National Stock Number 5961-00-403-5457. Primary manufacturer part number: 1N3666.
Features
  • Semiconductor Device,diode — FSC 5961
  • Specification/standard Data: 80131-RELEASE4021 PROFESSIONAL/INDUSTRIAL ASSOCIATION SPECIFICATION
  • Overall Diameter: 0.107 INCHES MAXIMUM IN
  • Mounting Method: TERMINAL
  • Current Rating Per Characteristic: 30.00 MILLIAMPERES MAXIMUM FORWARD CURRENT, DC
  • Joint Electronic Device Engineering Council/jedec/case Outline Designation: DO-7
  • Features Provided: HERMETICALLY SEALED CASE
  • Voltage Rating in Volts Per Characteristic: 80.0 MAXIMUM REVERSE VOLTAGE, PEAK
Applications
  • Circuit regulation and filtering
  • Signal conditioning
  • Power supply stabilization
  • Applications requiring Germanium Semiconductor construction
General Description

The Semiconductor Device,diode, cataloged under National Stock Number 5961-00-403-5457, 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 Lacon Electronic Gmbh. Government technical data includes 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 12 commercial cross-references from 10 manufacturers, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5961-00-403-5457
Primary Part Number1N3666
Item NameSemiconductor Device,diode
FSC / FSG5961 / 59 — No Item Name Available
ManufacturerLacon Electronic Gmbh
StatusACTIVE
Specification/standard Data80131-RELEASE4021 PROFESSIONAL/INDUSTRIAL ASSOCIATION SPECIFICATION
Overall Diameter0.107 INCHES MAXIMUM IN
Mounting MethodTERMINAL
Current Rating Per Characteristic30.00 MILLIAMPERES MAXIMUM FORWARD CURRENT, DC
Joint Electronic Device Engineering Council/jedec/case Outline DesignationDO-7
Features ProvidedHERMETICALLY SEALED CASE
Voltage Rating in Volts Per Characteristic80.0 MAXIMUM REVERSE VOLTAGE, PEAK
Terminal Length1.000 INCHES MINIMUM IN
MaterialGERMANIUM SEMICONDUCTOR
MaterialGLASS ENCLOSURE
Terminal Type and Quantity2 UNINSULATED WIRE LEAD
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
5961-00-194-8010 INTERCHANGEABLE
Semiconductor Device,diode
5961-00-724-2720 INTERCHANGEABLE
Semiconductor Device,diode
5961-00-902-8033 INTERCHANGEABLE
Semiconductor Device,diode
5961-00-935-0138 INTERCHANGEABLE
Semiconductor Device,diode
5961-00-959-3742 INTERCHANGEABLE
Semiconductor Device,diode
Cross-Reference Index
Part NumberManufacturer
1N3666 Lacon Electronic Gmbh (DEU)
1N3666 General Semiconductor Inc (USA)
1N3666 Adelco Elektronik Gmbh (DEU)
1N3666 Semicon Components Inc (USA)
RELEASE4021 Electronic Industries Association
1N3666 Electronic Industries Association
1N3666 International Diode Corp (USA)
1N3666 Semitronics Corp (USA)
1N3666 Gilbert Engineering Co Inc/incon Sub of Transitron Electronic Corp (USA)
1N3666A Adelco Elektronik Gmbh (DEU)
1N3666 Burns and Towne Inc (USA)
1N3666 Itt Semiconductors Div (USA)
Related Parts
5961-00-194-8010INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
5961-00-724-2720INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
5961-00-902-8033INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
5961-00-935-0138INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
5961-00-959-3742INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE

Frequently Asked Questions

What is NSN 5961-00-403-5457?

NSN 5961-00-403-5457 is a Semiconductor Device,diode, manufactured by Lacon Electronic Gmbh, classified under FSC 5961 (No Item Name Available). Status: active.

What are the part numbers for NSN 5961-00-403-5457?

NSN 5961-00-403-5457 has 12 cross-referenced part numbers: 1N3666 (Lacon Electronic Gmbh), 1N3666 (General Semiconductor Inc), 1N3666 (Adelco Elektronik Gmbh), 1N3666 (Semicon Components Inc), RELEASE4021 (Electronic Industries Association) and 7 more.

What NSN replaces 5961-00-403-5457?

There are 5 known substitutes for 5961-00-403-5457: 5961-00-194-8010, 5961-00-724-2720, 5961-00-902-8033 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1N3666?

Key specifications for 1N3666: Specification/standard Data: 80131-RELEASE4021 PROFESSIONAL/INDUSTRIAL ASSOCIATION SPECIFICATION; Overall Diameter: 0.107 INCHES MAXIMUM IN; Mounting Method: TERMINAL; Current Rating Per Characteristic: 30.00 MILLIAMPERES MAXIMUM FORWARD CURRENT, DC. 12 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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