The Circuit Breaker, cataloged under National Stock Number 5925-01-678-8239, is classified within Federal Supply Class 5925 (Circuit Breakers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Weg Electric Corp. Government technical data includes 19 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5925-01-678-8239 |
| Primary Part Number | UMBW-4C2-2 |
| Item Name | Circuit Breaker |
| FSC / FSG | 5925 / 59 — Circuit Breakers |
| Manufacturer | Weg Electric Corp |
| Status | ACTIVE |
| Reset Method | MANUAL |
| Operating Voltage Type and Rating Per Pole in Volts | 277.0 AC AND 480.0 AC AND 125.0 DC ALL LOCATIONS |
| Mounting Facility Type and Quantity | 1 DIN RAIL |
| Actuator Position Designation | BETWEEN POLE ONE AND TWO |
| Center to Center Distance Between Terminals Parallel to Width | 17.6 MILLIMETERS NOMINAL MM |
| Body Style | MULTIPOLE-SINGLE ACTUATOR TYPE |
| Circuit Protection Type | OVERCURRENT ALL LOCATIONS |
| Body Width | 52.9 MILLIMETERS NOMINAL MM |
| Body Height | 60.1 MILLIMETERS NOMINAL MM |
| Pole Quantity | 2 |
| Maximum Continuous Load Current Rating Per Pole | 2.0 AMPERES AC AND 2.0 AMPERES DC ALL LOCATIONS |
| Features Provided | TRIP INDICATOR |
| Trip Release Characteristic | INSTANTANEOUS ALL LOCATIONS |
| Maximum Interrupting Capacity Current Type and Rating Per Pole in Amps | 10000.0 AC AND 10000.0 DC ALL LOCATIONS |
| Manual Actuator Type and Quantity | 1 TOGGLE |
| Actuator Function | TRIP-RESET |
| Terminal Type and Quantity | 4 SCREW |
| Boss Height | 5.6 MILLIMETERS NOMINAL MM |
| Trip Release Method | THERMAL-MAGNETIC ALL LOCATIONS |
| 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 |
|---|---|
| UMBW-4C2-2 PRIMARY | Weg Electric Corp (USA) |
NSN 5925-01-678-8239 is a Circuit Breaker, manufactured by Weg Electric Corp, classified under FSC 5925, Circuit Breakers. Status: active.
NSN 5925-01-678-8239 has 1 manufacturer part number on file: UMBW-4C2-2 (Weg Electric Corp).
Key specifications for UMBW-4C2-2: Reset Method: MANUAL; Operating Voltage Type and Rating Per Pole in Volts: 277.0 AC AND 480.0 AC AND 125.0 DC ALL LOCATIONS; Mounting Facility Type and Quantity: 1 DIN RAIL; Actuator Position Designation: BETWEEN POLE ONE AND TWO. 19 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.