The Circuit Breaker, cataloged under National Stock Number 5925-01-397-7639, is classified within Federal Supply Class 5925 (Circuit Breakers) of the Electrical and Electronic Equipment Components group. Government technical data includes 25 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5925-01-397-7639 |
| Item Name | Circuit Breaker |
| FSC / FSG | 5925 / 59 — Circuit Breakers |
| Status | ACTIVE |
| Bushing Length | 0.380 INCHES NOMINAL IN |
| Reset Method | MANUAL |
| Internal Trip Release Configuration | SERIES TRIP ALL LOCATIONS |
| Operating Voltage Type and Rating Per Pole in Volts | 240.0 AC AND 50.0 DC ALL LOCATIONS |
| Mounting Facility Type and Quantity | 1 THREADED BUSHING WITH PANEL SEAL |
| Frequency in Hertz | 400.0 ALL LOCATIONS |
| Center to Center Distance Between Terminals Parallel to Width | 0.906 INCHES NOMINAL IN |
| Body Style | MULTIPOLE-SINGLE ACTUATOR TYPE |
| Ultimate Trip Rating of Continuous Current Rating Per Pole in Percent | 135.0 ALL LOCATIONS |
| Circuit Protection Type | OVERCURRENT ALL LOCATIONS |
| Body Width | 1.562 INCHES NOMINAL IN |
| Pole Quantity | 3 |
| Mounting Surface to Terminal End Distance | 1.828 INCHES MAXIMUM IN |
| Maximum Continuous Load Current Rating Per Pole | 0.5 MILLIAMPERES AC ALL LOCATIONS |
| Trip Release Characteristic | TIME DELAY ALL LOCATIONS |
| Maximum Interrupting Capacity Current Type and Rating Per Pole in Amps | 300.0 AC AND 500.0 DC ALL LOCATIONS |
| Nominal Thread Size | 0.375 INCHES IN |
| Body Length | 1.937 INCHES NOMINAL IN |
| Trip Delay Time in Seconds Per Rated Continuous Current | 0.500 MINIMUM AT 200 PCT AND 9.000 MAXIMUM AT 200 PCT ALL LOCATIONS |
| Manual Actuator Type and Quantity | 1 TOGGLE |
| Terminal Type and Quantity | 6 WIRE HOOK |
| Main Contact Tripping Mechanism Type | TRIP FREE |
| Thread Series Designator | UNEF |
| Trip Release Method | MAGNETIC ALL LOCATIONS |
| Center to Center Distance Between Terminals Parallel to Length | 0.625 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 |
| Reference | Meaning |
|---|---|
| M39019/6-201 | 5/9 Secondary reference U.S. Government activity |
| M39016/6-201 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| MIL-C-39019 | 5/9 Secondary reference U.S. Government activity |
| M39019/06-201 | 2/2 Government specification standardization U.S. Government activity |
| MIL-PRF-39019/6 | 4/1 Identification reference U.S. Government activity |
NSN 5925-01-397-7639 is a Circuit Breaker, classified under FSC 5925, Circuit Breakers. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5925-01-424-2443. Verify interchangeability with system specifications before substitution.
Key specifications for 5925-01-397-7639: Bushing Length: 0.380 INCHES NOMINAL IN; Reset Method: MANUAL; Internal Trip Release Configuration: SERIES TRIP ALL LOCATIONS; Operating Voltage Type and Rating Per Pole in Volts: 240.0 AC AND 50.0 DC ALL LOCATIONS. 25 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.