The Circuit Breaker, cataloged under National Stock Number 5925-01-421-8721, is classified within Federal Supply Class 5925 (Circuit Breakers) of the Electrical and Electronic Equipment Components group. Government technical data includes 28 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5925-01-421-8721 |
| Item Name | Circuit Breaker |
| FSC / FSG | 5925 / 59 — Circuit Breakers |
| Status | ACTIVE |
| Bushing Length | 0.464 INCHES MINIMUM AND 0.526 INCHES MAXIMUM IN |
| Reset Method | MANUAL |
| Internal Trip Release Configuration | SERIES TRIP ALL LOCATIONS |
| Operating Voltage Type and Rating Per Pole in Volts | 240.0 AC ALL LOCATIONS |
| Mounting Facility Type and Quantity | 1 THREADED BUSHING WITH PANEL SEAL |
| Frequency in Hertz | 60.0 ALL LOCATIONS |
| Center to Center Distance Between Terminals Parallel to Width | 0.735 INCHES MINIMUM AND 0.765 INCHES MAXIMUM IN |
| Body Style | MULTIPOLE-SINGLE ACTUATOR TYPE |
| Ultimate Trip Rating of Continuous Current Rating Per Pole in Percent | 125.0 ALL LOCATIONS |
| Circuit Protection Type | OVERCURRENT ALL LOCATIONS |
| Body Width | 2.265 INCHES MAXIMUM IN |
| Pole Quantity | 3 |
| Mounting Surface to Terminal End Distance | 2.232 INCHES MAXIMUM IN |
| Maximum Continuous Load Current Rating Per Pole | 15.0 AMPERES AC FIRST LOCATION |
| Maximum Continuous Load Current Rating Per Pole | 30.0 AMPERES AC SECOND LOCATION |
| Maximum Continuous Load Current Rating Per Pole | 30.0 AMPERES AC THIRD LOCATION |
| Trip Release Characteristic | TIME DELAY ALL LOCATIONS |
| Maximum Interrupting Capacity Current Type and Rating Per Pole in Amps | 1000.0 AC ALL LOCATIONS |
| Nominal Thread Size | 0.500 INCHES IN |
| Body Length | 1.969 INCHES MINIMUM AND 2.031 INCHES MAXIMUM IN |
| Trip Delay Time in Seconds Per Rated Continuous Current | 3.000 MINIMUM AT 200 PCT AND 20.000 MAXIMUM AT 200 PCT ALL LOCATIONS |
| Thread Quantity Per Inch | 32 |
| Material | PORCELAIN CASE |
| Terminal Type and Quantity | 6 TAB W/SCREW |
| Main Contact Tripping Mechanism Type | TRIP FREE |
| Thread Series Designator | UN |
| Trip Release Method | MAGNETIC ALL LOCATIONS |
| Center to Center Distance Between Terminals Parallel to Length | 1.499 INCHES MINIMUM AND 1.561 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| M55629A22SNSNSN | 4/1 Identification reference U.S. Government activity |
NSN 5925-01-421-8721 is a Circuit Breaker, classified under FSC 5925, Circuit Breakers. Status: active.
Key specifications for 5925-01-421-8721: Bushing Length: 0.464 INCHES MINIMUM AND 0.526 INCHES MAXIMUM IN; Reset Method: MANUAL; Internal Trip Release Configuration: SERIES TRIP ALL LOCATIONS; Operating Voltage Type and Rating Per Pole in Volts: 240.0 AC ALL LOCATIONS. 28 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.