PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

FDH5166Semiconductor Device,diode

National Semiconductor Corporation · NSN 5961-01-348-3811 · FSC 5961 · No Item Name Available
Verified by PartsTable
NSN 5961-01-348-3811 — this item is cataloged by the U.S. Government under National Stock Number 5961-01-348-3811. Primary manufacturer part number: FDH5166.
Features
  • Semiconductor Device,diode — FSC 5961
  • Test Data Document: 81349-MIL-S-19500 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
  • Material: SILICON SEMICONDUCTOR
  • Specification/standard Data: 81349-MIL-S-19500/241 GOVERNMENT SPECIFICATION
  • Terminal Type and Quantity: 2 UNINSULATED WIRE LEAD
  • Overall Diameter: 0.055 INCHES MINIMUM AND 0.090 INCHES MAXIMUM IN
  • Features Provided: HERMETICALLY SEALED CASE AND QUALITY ASSURANCE LEVEL TX
  • Function for Which Designed: SWITCHING
Applications
  • Circuit regulation and filtering
  • Signal conditioning
  • Power supply stabilization
  • Applications requiring Silicon Semiconductor construction
General Description

The Semiconductor Device,diode, cataloged under National Stock Number 5961-01-348-3811, 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 National Semiconductor Corporation. Government technical data includes 13 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 14 commercial cross-references from 10 manufacturers, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5961-01-348-3811
Primary Part NumberFDH5166
Item NameSemiconductor Device,diode
FSC / FSG5961 / 59 — No Item Name Available
ManufacturerNational Semiconductor Corporation
StatusCANCELLED
Test Data Document81349-MIL-S-19500 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
MaterialSILICON SEMICONDUCTOR
Specification/standard Data81349-MIL-S-19500/241 GOVERNMENT SPECIFICATION
Terminal Type and Quantity2 UNINSULATED WIRE LEAD
Overall Diameter0.055 INCHES MINIMUM AND 0.090 INCHES MAXIMUM IN
Features ProvidedHERMETICALLY SEALED CASE AND QUALITY ASSURANCE LEVEL TX
Function for Which DesignedSWITCHING
Terminal Length1.000 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN
Maximum Operating Temp Per Measurement Point175.0 CELSIUS AMBIENT AIR DEGC
Current Rating Per Characteristic500.00 MILLIAMPERES MAXIMUM PEAK FORWARD SURGE CURRENT
Mounting MethodTERMINAL
Voltage Rating in Volts Per Characteristic125.0 MAXIMUM WORKING PEAK REVERSE VOLTAGE, MAXIMUM PEAK TOTAL VALUE
MaterialGLASS ENCLOSURE
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 10
5961-00-009-2874 INTERCHANGEABLE
Semiconductor Device,diode
5961-00-912-4757 INTERCHANGEABLE
Semiconductor Device,diode
5961-00-965-6271 INTERCHANGEABLE
Semiconductor Device,diode
5961-01-069-7726 INTERCHANGEABLE
Semiconductor Device,diode
5961-01-127-6139 INTERCHANGEABLE
Semiconductor Device,diode
5961-01-385-423184704000 INTERCHANGEABLE
Semiconductor Device,diode
Narda Holdings, Inc. Dba Narda-Miteq Div Narda-Miteq
5961-01-419-20791N3595 INTERCHANGEABLE
Semiconductor Device,diode
Bkc Semiconductors Inc
5961-01-443-4603 INTERCHANGEABLE
Semiconductor Device,diode
5961-01-509-3132 INTERCHANGEABLE
Semiconductor Device,diode
5961-01-565-1643 INTERCHANGEABLE
Semiconductor Device,diode
Cross-Reference Index
Part NumberManufacturer
FDH5166 National Semiconductor Corporation (USA)
FJT1000 Fairchild Semiconductor Corp (USA)
947303-5958 Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp (USA)
3253954 Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA)
1N3595 Fairchild Semiconductor Corp (USA)
301899 Northrop Grumman Corp Electronic Systems Defensive System Div (USA)
JANTX1N3595 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
FDH5166 Fairchild Semiconductor Corp Components Group Sub of Schlumberger Ltd (USA)
MIS-14281 Us Army Aviation and Missile Command (USA)
707521 Fluke Corp (USA)
JANTX1N3595-1 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-PRF-19500/241 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
10180316 Us Army Aviation and Missile Command (USA)
CD13333 Telcom Semiconductor Inc (USA)
Related Parts
5961-00-009-2874INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
5961-00-912-4757INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
5961-00-965-6271INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
5961-01-069-7726INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
5961-01-127-6139INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
5961-01-385-4231INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
84704000
5961-01-419-2079INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
1N3595
5961-01-443-4603INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
5961-01-509-3132INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
5961-01-565-1643INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE

Frequently Asked Questions

What is NSN 5961-01-348-3811?

NSN 5961-01-348-3811 is a Semiconductor Device,diode, manufactured by National Semiconductor Corporation, classified under FSC 5961 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5961-01-348-3811?

NSN 5961-01-348-3811 has 14 cross-referenced part numbers: FDH5166 (National Semiconductor Corporation), FJT1000 (Fairchild Semiconductor Corp), 947303-5958 (Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp), 3253954 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), 1N3595 (Fairchild Semiconductor Corp) and 9 more.

What NSN replaces 5961-01-348-3811?

There are 10 known substitutes for 5961-01-348-3811: 5961-00-009-2874, 5961-00-912-4757, 5961-00-965-6271 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of FDH5166?

Key specifications for FDH5166: Test Data Document: 81349-MIL-S-19500 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).; Material: SILICON SEMICONDUCTOR; Specification/standard Data: 81349-MIL-S-19500/241 GOVERNMENT SPECIFICATION; Terminal Type and Quantity: 2 UNINSULATED WIRE LEAD. 14 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5961-01-348-3811 still in active supply?

NSN 5961-01-348-3811 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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