The Circuit Breaker, cataloged under National Stock Number 5925-01-659-9277, is classified within Federal Supply Class 5925 (Circuit Breakers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Cooper Bussmann, Llc Dba Cooper Industries. Government technical data includes 11 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 | 5925-01-659-9277 |
| Primary Part Number | 121A05-B4P |
| Item Name | Circuit Breaker |
| FSC / FSG | 5925 / 59 — Circuit Breakers |
| Manufacturer | Cooper Bussmann, Llc Dba Cooper Industries |
| Status | ACTIVE |
| Bushing Length | 0.56 INCHES MINIMUM AND 0.66 INCHES MAXIMUM IN |
| Operating Voltage Type and Rating Per Pole in Volts | 12.0 DC SINGLE LOCATION |
| Distance Between Centerlines of Mounting Facilities Parallel to Body Length | 1.56 INCHES NOMINAL IN |
| Body Width | 0.83 INCHES NOMINAL IN |
| Pole Quantity | 1 |
| Maximum Continuous Load Current Rating Per Pole | 5.0 AMPERES DC SINGLE LOCATION |
| Body Length | 1.27 INCHES NOMINAL IN |
| Material | PLASTIC CASE |
| Terminal Type and Quantity | 2 THREADED STUD |
| Trip Release Method | THERMAL SINGLE LOCATION |
| Center to Center Distance Between Terminals Parallel to Length | 0.69 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 |
|---|---|
| 121A05-B4P PRIMARY | Cooper Bussmann, Llc Dba Cooper Industries (USA) |
NSN 5925-01-659-9277 is a Circuit Breaker, manufactured by Cooper Bussmann, Llc Dba Cooper Industries, classified under FSC 5925, Circuit Breakers. Status: active.
NSN 5925-01-659-9277 has 1 manufacturer part number on file: 121A05-B4P (Cooper Bussmann, Llc Dba Cooper Industries).
Key specifications for 121A05-B4P: Bushing Length: 0.56 INCHES MINIMUM AND 0.66 INCHES MAXIMUM IN; Operating Voltage Type and Rating Per Pole in Volts: 12.0 DC SINGLE LOCATION; Distance Between Centerlines of Mounting Facilities Parallel to Body Length: 1.56 INCHES NOMINAL IN; Body Width: 0.83 INCHES NOMINAL IN. 11 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.