PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MIL-PRF-55629/1Circuit Breaker

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 5925-01-332-5631 · FSC 5925 · No Item Name Available
Verified by PartsTable
NSN 5925-01-332-5631 — this item is cataloged by the U.S. Government under National Stock Number 5925-01-332-5631. Primary manufacturer part number: MIL-PRF-55629/1.
Features
  • Circuit Breaker — FSC 5925
  • Body Width: 0.730 INCHES MINIMUM AND 0.780 INCHES MAXIMUM IN
  • Thread Quantity Per Inch: 32
  • Boss Height: 0.109 INCHES MINIMUM AND 0.171 INCHES MAXIMUM IN
  • Fragility Factor: MODERATELY RUGGED
  • Mounting Surface to Terminal End Distance: 1.960 INCHES MINIMUM AND 2.080 INCHES MAXIMUM IN
  • Storage Type: GENERAL PURPOSE WAREHOUSE
  • Pole Quantity: 1
Applications
  • Applications requiring Plastic Case construction
General Description

The Circuit Breaker, cataloged under National Stock Number 5925-01-332-5631, 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 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 30 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5925-01-332-5631
Primary Part NumberMIL-PRF-55629/1
Item NameCircuit Breaker
FSC / FSG5925 / 59 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
Body Width0.730 INCHES MINIMUM AND 0.780 INCHES MAXIMUM IN
Thread Quantity Per Inch32
Boss Height0.109 INCHES MINIMUM AND 0.171 INCHES MAXIMUM IN
Fragility FactorMODERATELY RUGGED
Mounting Surface to Terminal End Distance1.960 INCHES MINIMUM AND 2.080 INCHES MAXIMUM IN
Storage TypeGENERAL PURPOSE WAREHOUSE
Pole Quantity1
Arc Quenching MethodMAGNETIC BLOWOUT
Distance Between Centerlines of Mounting Facilities Parallel to Body Length2.046 INCHES MINIMUM AND 2.078 INCHES MAXIMUM IN
Mounting Facility Type and Quantity2 THREADED HOLE(S)
Center to Center Distance Between Terminals Parallel to Length1.460 INCHES MINIMUM AND 1.760 INCHES MAXIMUM IN
Body Length2.510 INCHES MAXIMUM IN
Ultimate Trip Rating of Continuous Current Rating Per Pole in Percent125.0 SINGLE LOCATION
Circuit Protection TypeOVERCURRENT SINGLE LOCATION
Frequency in Hertz60.0 SINGLE LOCATION
Trip Delay Time in Seconds Per Rated Continuous Current3.000 MINIMUM AT 200 PCT AND 20.000 MAXIMUM AT 200 PCT SINGLE LOCATION
Internal Trip Release ConfigurationSERIES TRIP SINGLE LOCATION
Test Data Document81349-MIL-C-55629 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.).
MaterialPLASTIC CASE
Reset MethodMANUAL
Actuator FunctionTRIP-RESET
Manual Actuator Type and Quantity1 TOGGLE
Terminal Type and Quantity2 THREADED STUD
Specification/standard Data81349-MIL-C-55629/1 GOVERNMENT SPECIFICATION
Main Contact Tripping Mechanism TypeTRIP FREE
Inclosure Protection Type for Which DesignedDUSTPROOF AND FUNGUS PROOF
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC)
Trip Release CharacteristicTIME DELAY SINGLE LOCATION
Maximum Continuous Load Current Rating Per Pole35.0 AMPERES AC SINGLE LOCATION
Trip Release MethodMAGNETIC SINGLE LOCATION
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5925-00-163-6982 INTERCHANGEABLE
Circuit Breaker
5925-00-487-6532 INTERCHANGEABLE
Circuit Breaker
5925-00-566-4169 INTERCHANGEABLE
Circuit Breaker
5925-00-583-8922 INTERCHANGEABLE
Circuit Breaker
5925-01-005-9799 INTERCHANGEABLE
Circuit Breaker
5925-01-019-9426IELK1-1-62-6.00-01-V INTERCHANGEABLE
Circuit Breaker
Sensata Technologies, Inc. Div Sensata Attleboro
5925-01-075-3802 INTERCHANGEABLE
Circuit Breaker
5925-01-097-6892 INTERCHANGEABLE
Circuit Breaker
5925-01-265-7723 INTERCHANGEABLE
Circuit Breaker
5925-01-265-7733 INTERCHANGEABLE
Circuit Breaker
Cross-Reference Index
Part NumberManufacturer
MIL-PRF-55629/1 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
M55629/1-409 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-PRF-55629/1D Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-C-55629/1 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5925-00-163-6982INTERCHANGEABLE
CIRCUIT BREAKER
5925-00-487-6532INTERCHANGEABLE
CIRCUIT BREAKER
5925-00-566-4169INTERCHANGEABLE
CIRCUIT BREAKER
5925-00-583-8922INTERCHANGEABLE
CIRCUIT BREAKER
5925-01-005-9799INTERCHANGEABLE
CIRCUIT BREAKER
5925-01-019-9426INTERCHANGEABLE
CIRCUIT BREAKER
IELK1-1-62-6.00-01-V
5925-01-075-3802INTERCHANGEABLE
CIRCUIT BREAKER
5925-01-097-6892INTERCHANGEABLE
CIRCUIT BREAKER
5925-01-265-7723INTERCHANGEABLE
CIRCUIT BREAKER
5925-01-265-7733INTERCHANGEABLE
CIRCUIT BREAKER
5925-01-274-1284INTERCHANGEABLE
CIRCUIT BREAKER
5925-01-354-9726INTERCHANGEABLE
CIRCUIT BREAKER

Frequently Asked Questions

What is NSN 5925-01-332-5631?

NSN 5925-01-332-5631 is a Circuit Breaker, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 5925 (No Item Name Available). Status: active.

What are the part numbers for NSN 5925-01-332-5631?

NSN 5925-01-332-5631 has 4 cross-referenced part numbers: MIL-PRF-55629/1 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), M55629/1-409 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-PRF-55629/1D (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-C-55629/1 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 5925-01-332-5631?

There are 12 known substitutes for 5925-01-332-5631: 5925-00-163-6982, 5925-00-487-6532, 5925-00-566-4169 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MIL-PRF-55629/1?

Key specifications for MIL-PRF-55629/1: Body Width: 0.730 INCHES MINIMUM AND 0.780 INCHES MAXIMUM IN; Thread Quantity Per Inch: 32; Boss Height: 0.109 INCHES MINIMUM AND 0.171 INCHES MAXIMUM IN; Fragility Factor: MODERATELY RUGGED. 30 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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