The Circuit Breaker, cataloged under National Stock Number 5925-01-577-9239, is classified within Federal Supply Class 5925 (Circuit Breakers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Leonardo S.p.a Land & Naval Defence Electronics Division. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5925-01-577-9239 |
| Primary Part Number | 74C526P020 |
| Item Name | Circuit Breaker |
| FSC / FSG | 5925 / 59 — Circuit Breakers |
| Manufacturer | Leonardo S.p.a Land & Naval Defence Electronics Division |
| Status | ACTIVE |
| 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 |
|---|---|
| 74C526P020 | Leonardo S.p.a Land & Naval Defence Electronics Division (ITA) |
| Reference | Meaning |
|---|---|
| AM4RA2A3A3B2LC15DL53 | 3/2 Design control — primary reference U.S. Government activity |
| AM4RA2A3A3B2LC15DL53 | 5/9 Secondary reference Eaton Corp Heinemann Products Commercial Controls Div |
NSN 5925-01-577-9239 is a Circuit Breaker, manufactured by Leonardo S.p.a Land & Naval Defence Electronics Division, classified under FSC 5925, Circuit Breakers. Status: active.
NSN 5925-01-577-9239 has 1 manufacturer part number on file: 74C526P020 (Leonardo S.p.a Land & Naval Defence Electronics Division).
Key specifications for 74C526P020: Special Features: 4POLE;50/60HZ AND DC;SERIES TRIP WITH AUXILIARY;MULTI POLE BREAKER;UL 1077 (UP TO 277VAC 50A MAX);METRIC M5 THREADS (70A);5 AMPS CURRENT;SHORT DELAY 8X INRUSH CURVE VAC; End Item Identification: CIRCUIT AND MOTOR PROTECTION. 0 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.