The Circuit Breaker, cataloged under National Stock Number 5925-01-438-1944, is classified within Federal Supply Class 5925 (Circuit Breakers) of the Electrical and Electronic Equipment Components group. Government technical data includes 22 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5925-01-438-1944 |
| Item Name | Circuit Breaker |
| FSC / FSG | 5925 / 59 — Circuit Breakers |
| Status | ACTIVE |
| Reset Method | MANUAL |
| Operating Voltage Type and Rating Per Pole in Volts | 240.0 AC SINGLE LOCATION |
| Mounting Facility Type and Quantity | 2 THREADED HOLE(S) |
| Frequency in Hertz | 60.0 SINGLE LOCATION |
| Body Style | SINGLE POLE TYPE |
| Body Width | 1.026 INCHES NOMINAL IN |
| Pole Quantity | 1 |
| Mounting Surface to Terminal End Distance | 3.340 INCHES NOMINAL IN |
| Maximum Continuous Load Current Rating Per Pole | 70.0 AMPERES AC SINGLE LOCATION |
| Trip Release Characteristic | TIME DELAY SINGLE LOCATION |
| Maximum Interrupting Capacity Current Type and Rating Per Pole in Amps | 125.0 AC SINGLE LOCATION |
| Nominal Thread Size | 0.138 INCHES IN |
| Specification/standard Data | 81349-MIL-C-55629/13 GOVERNMENT SPECIFICATION |
| Body Length | 4.750 INCHES NOMINAL IN |
| Trip Delay Time in Seconds Per Rated Continuous Current | 90.000 MAXIMUM AT 125 PCT SINGLE LOCATION |
| Test Data Document | 81349-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.). |
| Thread Quantity Per Inch | 32 |
| Material | PLASTIC CASE |
| Main Contact Tripping Mechanism Type | TRIP FREE |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Trip Release Method | MAGNETIC SINGLE LOCATION |
| Center to Center Distance Between Terminals Parallel to Length | 3.547 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| M55629/13NP | 2/2 Government specification standardization U.S. Government activity |
| MIL-C-55629/13 | 4/1 Identification reference U.S. Government activity |
NSN 5925-01-438-1944 is a Circuit Breaker, classified under FSC 5925, Circuit Breakers. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5925-01-438-2067. Verify interchangeability with system specifications before substitution.
Key specifications for 5925-01-438-1944: Reset Method: MANUAL; Operating Voltage Type and Rating Per Pole in Volts: 240.0 AC SINGLE LOCATION; Mounting Facility Type and Quantity: 2 THREADED HOLE(S); Frequency in Hertz: 60.0 SINGLE LOCATION. 22 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.