PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

634-80Circuit Breaker

Belshaw Bros., Inc. Dba Belshaw Bros Inc · NSN 5925-01-099-0372 · FSC 5925 · No Item Name Available
Verified by PartsTable
NSN 5925-01-099-0372 — this item is cataloged by the U.S. Government under National Stock Number 5925-01-099-0372. Primary manufacturer part number: 634-80.
Features
  • Circuit Breaker — FSC 5925
  • Body Height: 2.310 INCHES NOMINAL IN
  • Terminal Type and Quantity: 2 CLIP AND 2 COMPRESSION
  • Test Data Document: 81348-W-C-375 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.).
  • Trip Release Method: THERMAL ALL LOCATIONS
  • Maximum Interrupting Capacity Current Type and Rating Per Pole in Amps: 10000.0 AC ALL LOCATIONS
  • Trip Release Ambient Temp Rating: 25.0 CELSIUS NOMINAL ALL LOCATIONS DEGC
  • Ultimate Trip Rating of Continuous Current Rating Per Pole in Percent: 135.0 ALL LOCATIONS
Applications
  • Applications requiring Plastic Case construction
General Description

The Circuit Breaker, cataloged under National Stock Number 5925-01-099-0372, is classified within Federal Supply Class 5925 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Belshaw Bros., Inc. Dba Belshaw Bros Inc. Government technical data includes 30 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 7 commercial cross-references from 4 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
NSN5925-01-099-0372
Primary Part Number634-80
Item NameCircuit Breaker
FSC / FSG5925 / 59 — No Item Name Available
ManufacturerBelshaw Bros., Inc. Dba Belshaw Bros Inc
StatusCANCELLED
Body Height2.310 INCHES NOMINAL IN
Terminal Type and Quantity2 CLIP AND 2 COMPRESSION
Test Data Document81348-W-C-375 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.).
Trip Release MethodTHERMAL ALL LOCATIONS
Maximum Interrupting Capacity Current Type and Rating Per Pole in Amps10000.0 AC ALL LOCATIONS
Trip Release Ambient Temp Rating25.0 CELSIUS NOMINAL ALL LOCATIONS DEGC
Ultimate Trip Rating of Continuous Current Rating Per Pole in Percent135.0 ALL LOCATIONS
Circuit Protection TypeOVERCURRENT ALL LOCATIONS
Inclosure Protection Type for Which DesignedCORROSION RESISTANT
Trip Release CharacteristicINSTANTANEOUS ALL LOCATIONS
Manual Actuator Type and Quantity1 TOGGLE
Frequency in Hertz60.0 ALL LOCATIONS
Actuator FunctionTRIP-RESET
Internal Trip Release ConfigurationSERIES TRIP ALL LOCATIONS
MaterialPLASTIC CASE
Operating Voltage Type and Rating Per Pole in Volts240.0 AC ALL LOCATIONS
Actuator Position DesignationAT POLE ONE
Maximum Continuous Load Current Rating Per Pole40.0 AMPERES AC ALL LOCATIONS
Specification/standard Data81348-W-C-375/2 GOVERNMENT SPECIFICATION
Main Contact Tripping Mechanism TypeTRIP FREE
Reset MethodMANUAL
Special Handling FeatureMAGNETIC
Center to Center Distance Between Terminals Parallel to Width0.740 INCHES NOMINAL IN
Mounting Facility Type and Quantity4 TERMINAL
Pole Quantity2
Storage TypeGENERAL PURPOSE WAREHOUSE
Boss Height0.250 INCHES NOMINAL IN
Fragility FactorMODERATELY RUGGED
Body Length3.000 INCHES NOMINAL IN
Body Width1.480 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 10
5925-00-513-2532 INTERCHANGEABLE
Circuit Breaker
5925-00-958-6828 INTERCHANGEABLE
Circuit Breaker
5110-01-045-35118 INTERCHANGEABLE
File,thread Restorer
Jaw Mfg Co
5925-01-092-9573 INTERCHANGEABLE
Circuit Breaker
5925-01-096-4677 INTERCHANGEABLE
Circuit Breaker
5925-01-099-0371 INTERCHANGEABLE
Circuit Breaker
5925-01-099-8648 INTERCHANGEABLE
Circuit Breaker
3040-01-102-816743719 INTERCHANGEABLE
Bracket,eye,rotating Shaft
Moog Inc.
5925-01-147-8574 INTERCHANGEABLE
Circuit Breaker
5925-01-218-5420 INTERCHANGEABLE
Circuit Breaker
Cross-Reference Index
Part NumberManufacturer
634-80 Belshaw Bros., Inc. Dba Belshaw Bros Inc (USA)
Q02240 Schneider Electric Usa, Inc. (USA)
Q0240 Square D Co (USA)
W-C-375/2 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
Q0-240 Schneider Electric Usa, Inc. (USA)
QO240 Schneider Electric Usa, Inc. (USA)
WC375/02-006 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
Related Parts
5925-00-513-2532INTERCHANGEABLE
CIRCUIT BREAKER
5925-00-958-6828INTERCHANGEABLE
CIRCUIT BREAKER
5110-01-045-3511INTERCHANGEABLE
FILE,THREAD RESTORER
8
5925-01-092-9573INTERCHANGEABLE
CIRCUIT BREAKER
5925-01-096-4677INTERCHANGEABLE
CIRCUIT BREAKER
5925-01-099-0371INTERCHANGEABLE
CIRCUIT BREAKER
5925-01-099-8648INTERCHANGEABLE
CIRCUIT BREAKER
3040-01-102-8167INTERCHANGEABLE
BRACKET,EYE,ROTATING SHAFT
43719
5925-01-147-8574INTERCHANGEABLE
CIRCUIT BREAKER
5925-01-218-5420INTERCHANGEABLE
CIRCUIT BREAKER

Frequently Asked Questions

What is NSN 5925-01-099-0372?

NSN 5925-01-099-0372 is a Circuit Breaker, manufactured by Belshaw Bros., Inc. Dba Belshaw Bros Inc, classified under FSC 5925 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5925-01-099-0372?

NSN 5925-01-099-0372 has 7 cross-referenced part numbers: 634-80 (Belshaw Bros., Inc. Dba Belshaw Bros Inc), Q02240 (Schneider Electric Usa, Inc.), Q0240 (Square D Co), W-C-375/2 (Federal Specifications Promulgated by General Services Administration Washington DC), Q0-240 (Schneider Electric Usa, Inc.) and 2 more.

What NSN replaces 5925-01-099-0372?

There are 10 known substitutes for 5925-01-099-0372: 5925-00-513-2532, 5925-00-958-6828, 5110-01-045-3511 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 634-80?

Key specifications for 634-80: Body Height: 2.310 INCHES NOMINAL IN; Terminal Type and Quantity: 2 CLIP AND 2 COMPRESSION; Test Data Document: 81348-W-C-375 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.).; Trip Release Method: THERMAL ALL LOCATIONS. 30 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5925-01-099-0372 still in active supply?

NSN 5925-01-099-0372 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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