The Circuit Breaker, cataloged under National Stock Number 5925-01-337-0995, is classified within Federal Supply Class 5925 (Circuit Breakers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Whipp & Bourne Inc.. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5925-01-337-0995 |
| Primary Part Number | 4284063-9/B2 |
| Item Name | Circuit Breaker |
| FSC / FSG | 5925 / 59 — Circuit Breakers |
| Manufacturer | Whipp & Bourne Inc. |
| Status | ACTIVE |
| Reset Method | AUTOMATIC AND MANUAL |
| Internal Trip Release Configuration | SHUNT TRIP ALL LOCATIONS |
| Operating Voltage Type and Rating Per Pole in Volts | 500.0 AC ALL LOCATIONS |
| Mounting Facility Type and Quantity | 1 SLOT |
| Frequency in Hertz | 60.0 ALL LOCATIONS |
| Body Style | RECTANGULAR DIMENSIONAL ENVELOPE |
| Ultimate Trip Rating of Continuous Current Rating Per Pole in Percent | 4250.0 ALL LOCATIONS |
| Circuit Protection Type | OVERCURRENT ALL LOCATIONS |
| Pole Quantity | 3 |
| Maximum Continuous Load Current Rating Per Pole | 2000.0 AMPERES AC ALL LOCATIONS |
| Trip Release Characteristic | INSTANTANEOUS ALL LOCATIONS |
| Maximum Interrupting Capacity Current Type and Rating Per Pole in Amps | 85000.0 AC ALL LOCATIONS |
| Terminal Type and Quantity | 1 BUS BAR |
| Main Contact Tripping Mechanism Type | NONTRIP FREE |
| Trip Release Method | MAGNETIC ALL LOCATIONS |
| Mounting Slot Width | 3.375 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 |
|---|---|
| 4284063-9/B2 PRIMARY | Whipp & Bourne Inc. (USA) |
| 4284063-9/B2 | Fki Engineering Ltd T/a Whipp & Bourne (GBR) |
| Reference | Meaning |
|---|---|
| 419805 | 5/1 Secondary reference Whipp & Bourne Inc. |
NSN 5925-01-337-0995 is a Circuit Breaker, manufactured by Whipp & Bourne Inc., classified under FSC 5925, Circuit Breakers. Status: active.
NSN 5925-01-337-0995 has 2 manufacturer part numbers on file: 4284063-9/B2 (Whipp & Bourne Inc.), 4284063-9/B2 (Fki Engineering Ltd T/a Whipp & Bourne).
Key specifications for 4284063-9/B2: Reset Method: AUTOMATIC AND MANUAL; Internal Trip Release Configuration: SHUNT TRIP ALL LOCATIONS; Operating Voltage Type and Rating Per Pole in Volts: 500.0 AC ALL LOCATIONS; Mounting Facility Type and Quantity: 1 SLOT. 16 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.