PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1N3174ASemiconductor Device,diode

Westinghouse Electric Corp Semiconductor Div · NSN 5961-00-173-3228 · FSC 5961 · No Item Name Available
Verified by PartsTable
NSN 5961-00-173-3228 — this item is cataloged by the U.S. Government under National Stock Number 5961-00-173-3228. Primary manufacturer part number: 1N3174A.
Features
  • Semiconductor Device,diode — FSC 5961
  • Features Provided: HERMETICALLY SEALED CASE
  • Mounting Method: THREADED STUD(S)
  • Current Rating Per Characteristic: 175.00 AMPERES MAXIMUM AVERAGE ON-STATE CURRENT, 180 DEGREES CONDUCTION ANGLE, AVERAGE OVER A FULL 60-HZ CYCLE
  • Maximum Operating Temp Per Measurement Point: 175.0 CELSIUS CASE DEGC
  • Mounting Facility Quantity: 1
  • Voltage Rating in Volts Per Characteristic: 1200.0 MAXIMUM REVERSE VOLTAGE, INSTANTANEOUS AND 1000.0 MAXIMUM WORKING PEAK REVERSE VOLTAGE, MAXIMUM PEAK TOTAL VALUE
  • Overall Width Across Flats: 1.218 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN
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 5961-00-173-3228, 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 Westinghouse Electric Corp Semiconductor Div. Government technical data includes 13 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5961-00-173-3228
Primary Part Number1N3174A
Item NameSemiconductor Device,diode
FSC / FSG5961 / 59 — No Item Name Available
ManufacturerWestinghouse Electric Corp Semiconductor Div
StatusCANCELLED
Features ProvidedHERMETICALLY SEALED CASE
Mounting MethodTHREADED STUD(S)
Current Rating Per Characteristic175.00 AMPERES MAXIMUM AVERAGE ON-STATE CURRENT, 180 DEGREES CONDUCTION ANGLE, AVERAGE OVER A FULL 60-HZ CYCLE
Maximum Operating Temp Per Measurement Point175.0 CELSIUS CASE DEGC
Mounting Facility Quantity1
Voltage Rating in Volts Per Characteristic1200.0 MAXIMUM REVERSE VOLTAGE, INSTANTANEOUS AND 1000.0 MAXIMUM WORKING PEAK REVERSE VOLTAGE, MAXIMUM PEAK TOTAL VALUE
Overall Width Across Flats1.218 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN
Nominal Thread Size0.750 INCHES IN
MaterialSILICON SEMICONDUCTOR
Terminal Type and Quantity1 THREADED STUD AND 1 TAB, SOLDER LUG
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.).
Specification/standard Data81349-MIL-S-19500/211 GOVERNMENT SPECIFICATION
Thread Series DesignatorUNF
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 7
5961-00-087-9013 INTERCHANGEABLE
Semiconductor Device,diode
5961-00-228-6254 INTERCHANGEABLE
Semiconductor Device,diode
5961-00-913-2848 INTERCHANGEABLE
Semiconductor Device,diode
5961-00-985-9028 INTERCHANGEABLE
Semiconductor Device,diode
5961-01-027-9661 INTERCHANGEABLE
Semiconductor Device,diode
5961-01-105-9683 INTERCHANGEABLE
Semiconductor Device,diode
5961-01-247-8315 INTERCHANGEABLE
Semiconductor Device,diode
Cross-Reference Index
Part NumberManufacturer
1N3174A Westinghouse Electric Corp Semiconductor Div (USA)
MIL-S-19500/211 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-3174 Powerex, Inc. (USA)
MIL-PRF-19500/211 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
JAN1N3174 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
44A356469-001 General Electric Co Armament and Electrical Systems Dept Electrical Systems Products Dept (USA)
Related Parts
5961-00-087-9013INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
5961-00-228-6254INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
5961-00-913-2848INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
5961-00-985-9028INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
5961-01-027-9661INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
5961-01-105-9683INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
5961-01-247-8315INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE

Frequently Asked Questions

What is NSN 5961-00-173-3228?

NSN 5961-00-173-3228 is a Semiconductor Device,diode, manufactured by Westinghouse Electric Corp Semiconductor Div, classified under FSC 5961 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5961-00-173-3228?

NSN 5961-00-173-3228 has 6 cross-referenced part numbers: 1N3174A (Westinghouse Electric Corp Semiconductor Div), MIL-S-19500/211 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-3174 (Powerex, Inc.), MIL-PRF-19500/211 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), JAN1N3174 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M) and 1 more.

What NSN replaces 5961-00-173-3228?

There are 7 known substitutes for 5961-00-173-3228: 5961-00-087-9013, 5961-00-228-6254, 5961-00-913-2848 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1N3174A?

Key specifications for 1N3174A: Features Provided: HERMETICALLY SEALED CASE; Overall Length: 2.300 INCHES MAXIMUM IN; Mounting Method: THREADED STUD(S); Current Rating Per Characteristic: 175.00 AMPERES MAXIMUM AVERAGE ON-STATE CURRENT, 180 DEGREES CONDUCTION ANGLE, AVERAGE OVER A FULL 60-HZ CYCLE. 14 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5961-00-173-3228 still in active supply?

NSN 5961-00-173-3228 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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