The Circuit Breaker, cataloged under National Stock Number 5925-01-422-6783, is classified within Federal Supply Class 5925 (Circuit Breakers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Serco Limited. Government technical data includes 10 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5925-01-422-6783 |
| Primary Part Number | M39019/01-258S |
| Item Name | Circuit Breaker |
| FSC / FSG | 5925 / 59 — Circuit Breakers |
| Manufacturer | Serco Limited |
| Status | ACTIVE |
| Operating Voltage Type and Rating Per Pole in Volts | 240.0 AC ALL LOCATIONS |
| Actuator Position Designation | AT POLE ONE |
| Frequency in Hertz | 60.0 OR 400.0 ALL LOCATIONS |
| Precious Material | SILVER |
| Pole Quantity | 1 |
| Maximum Continuous Load Current Rating Per Pole | 20.0 AMPERES AC ALL LOCATIONS |
| Inclosure Protection Type for Which Designed | GENERAL PURPOSE |
| Precious Material and Location | TERMINAL SURFACES SILVER |
| Actuator Function | TRIP-RESET |
| Terminal Type and Quantity | 2 WIRE HOOK |
| 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 |
|---|---|
| M39019/01-258S | Serco Limited (GBR) |
| Reference | Meaning |
|---|---|
| MIL-PRF-39019/1 | 4/1 Identification reference U.S. Government activity |
| M39019/01-258S | 2/2 Government specification standardization U.S. Government activity |
NSN 5925-01-422-6783 is a Circuit Breaker, manufactured by Serco Limited, classified under FSC 5925, Circuit Breakers. Status: active.
NSN 5925-01-422-6783 has 1 manufacturer part number on file: M39019/01-258S (Serco Limited).
Key specifications for M39019/01-258S: Operating Voltage Type and Rating Per Pole in Volts: 240.0 AC ALL LOCATIONS; Actuator Position Designation: AT POLE ONE; Frequency in Hertz: 60.0 OR 400.0 ALL LOCATIONS; Precious Material: SILVER. 10 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.