The Circuit Breaker, cataloged under National Stock Number 5925-01-281-3041, is classified within Federal Supply Class 5925 (Circuit Breakers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Westinghouse Electric Corp. Government technical data includes 26 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Circuit Breaker |
| FSC / FSG | 5925 — Circuit Breakers (FSG 59) |
| Manufacturers | Westinghouse Electric Corp (CAGE 79500) |
| Parameter | Value |
|---|---|
| NSN | 5925-01-281-3041 |
| Primary Part Number | 4520391G17 |
| Item Name | Circuit Breaker |
| FSC / FSG | 5925 / 59 — Circuit Breakers |
| Manufacturer | Westinghouse Electric Corp |
| Status | ACTIVE |
| Reset Method | MANUAL |
| Operating Voltage Type and Rating Per Pole in Volts | 500.0 AC ALL LOCATIONS |
| Mounting Facility Type and Quantity | 2 SLOT AND 4 UNTHREADED HOLE(S) |
| Ultimate Trip Time Per Pole in Seconds | 10.000 NOMINAL ALL LOCATIONS |
| Frequency in Hertz | 60.0 ALL LOCATIONS |
| Center to Center Distance Between Terminals Parallel to Width | 3.250 INCHES NOMINAL IN |
| Body Style | MULTIPOLE-SINGLE ACTUATOR TYPE |
| Ultimate Trip Rating of Continuous Current Rating Per Pole in Percent | 130.0 ALL LOCATIONS |
| Distance Between Centerlines of Mounting Facilities Parallel to Body Length | 8.750 INCHES NOMINAL IN |
| Circuit Protection Type | OVERCURRENT ALL LOCATIONS |
| Body Width | 4.937 INCHES NOMINAL IN |
| Unthreaded Mounting Hole Diameter | 0.875 INCHES NOMINAL IN |
| Pole Quantity | 3 |
| Maximum Continuous Load Current Rating Per Pole | 15.0 AMPERES AC ALL LOCATIONS |
| Trip Release Characteristic | INSTANTANEOUS AND TIME DELAY ALL LOCATIONS |
| Maximum Interrupting Capacity Current Type and Rating Per Pole in Amps | 210.0 AC ALL LOCATIONS |
| Body Length | 10.156 INCHES NOMINAL IN |
| Trip Delay Time in Seconds Per Rated Continuous Current | 25.000 MINIMUM AT 600 PCT AND 3600.000 MAXIMUM AT 130 PCT ALL LOCATIONS |
| Distance Between Centerlines of Mounting Facilities Parallel to Body Width | 1.625 INCHES NOMINAL IN |
| Trip Release Ambient Temp Rating | 50.0 CELSIUS NOMINAL ALL LOCATIONS DEGC |
| Terminal Type and Quantity | 3 THREADED STUD |
| Main Contact Tripping Mechanism Type | TRIP FREE |
| Boss Height | 0.187 INCHES NOMINAL IN |
| Trip Release Method | THERMAL-MAGNETIC ALL LOCATIONS |
| Center to Center Distance Between Terminals Parallel to Length | 8.750 INCHES NOMINAL IN |
| Mounting Slot Width | 1.125 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 |
| Part Number | Manufacturer |
|---|---|
| 4520391G17 PRIMARY | Westinghouse Electric Corp (USA) |
| Reference | Meaning |
|---|---|
| 452D391G17 | C/1 Advisory reference — outside the item-of-supply concept Westinghouse Electric Corp Power Generation-Generator Div |
NSN 5925-01-281-3041 is a Circuit Breaker, manufactured by Westinghouse Electric Corp, classified under FSC 5925, Circuit Breakers. Status: active.
NSN 5925-01-281-3041 has 1 manufacturer part number on file: 4520391G17 (Westinghouse Electric Corp).
Key specifications for 4520391G17: Reset Method: MANUAL; Operating Voltage Type and Rating Per Pole in Volts: 500.0 AC ALL LOCATIONS; Mounting Facility Type and Quantity: 2 SLOT AND 4 UNTHREADED HOLE(S); Overall Height: 9.826 INCHES NOMINAL IN. 26 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.