The Circuit Breaker, cataloged under National Stock Number 5925-01-431-7057, is classified within Federal Supply Class 5925 (Circuit Breakers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 21 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.
| Parameter | Value |
|---|---|
| NSN | 5925-01-431-7057 |
| Primary Part Number | 74B059539-201 |
| Item Name | Circuit Breaker |
| FSC / FSG | 5925 / 59 — Circuit Breakers |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Reset Method | MANUAL |
| Operating Voltage Type and Rating Per Pole in Volts | 28.0 AC SINGLE LOCATION |
| Mounting Facility Type and Quantity | 3 THREADED STUD(S) |
| Frequency in Hertz | 60.0 SINGLE LOCATION |
| Body Style | SINGLE POLE TYPE |
| Ultimate Trip Rating of Continuous Current Rating Per Pole in Percent | 51.0 SINGLE LOCATION |
| Distance Between Centerlines of Mounting Facilities Parallel to Body Length | 0.656 INCHES NOMINAL IN |
| Circuit Protection Type | ERROR VOLTAGE SINGLE LOCATION |
| Body Width | 0.750 INCHES NOMINAL IN |
| Pole Quantity | 1 |
| Mounting Surface to Terminal End Distance | 2.200 INCHES MAXIMUM IN |
| Maximum Continuous Load Current Rating Per Pole | 20.0 AMPERES AC SINGLE LOCATION |
| Trip Release Characteristic | INSTANTANEOUS SINGLE LOCATION |
| Nominal Thread Size | 0.138 INCHES IN |
| Body Length | 2.000 INCHES NOMINAL IN |
| Auxiliary Trip Coil Voltage Type and Rating in Volts | 22.0 DC NOMINAL SINGLE LOCATION |
| Terminal Type and Quantity | 4 TAB W/SCREW |
| Main Contact Tripping Mechanism Type | NONTRIP FREE |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Trip Release Method | SOLID STATE SINGLE LOCATION |
| Center to Center Distance Between Terminals Parallel to Length | 1.530 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 |
|---|---|
| 74B059539-201 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| APGN2-27844-1 | 5/2 Secondary reference U.S. Government activity |
NSN 5925-01-431-7057 is a Circuit Breaker, manufactured by The Boeing Company Div Defense, classified under FSC 5925, Circuit Breakers. Status: active.
NSN 5925-01-431-7057 has 1 manufacturer part number on file: 74B059539-201 (The Boeing Company Div Defense).
Key specifications for 74B059539-201: Reset Method: MANUAL; Operating Voltage Type and Rating Per Pole in Volts: 28.0 AC SINGLE LOCATION; Mounting Facility Type and Quantity: 3 THREADED STUD(S); Frequency in Hertz: 60.0 SINGLE LOCATION. 21 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.