The Circuit Breaker, cataloged under National Stock Number 5925-01-698-6777, is classified within Federal Supply Class 5925 (Circuit Breakers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Heinemann Electric Canada Incdivision of Eaton Corp. Government technical data includes 17 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5925-01-698-6777 |
| Primary Part Number | AM4R-Y57-1 |
| Item Name | Circuit Breaker |
| FSC / FSG | 5925 / 59 — Circuit Breakers |
| Manufacturer | Heinemann Electric Canada Incdivision of Eaton Corp |
| Status | ACTIVE |
| Reset Method | ELECTRIC |
| Internal Trip Release Configuration | SERIES TRIP ALL LOCATIONS |
| Operating Voltage Type and Rating Per Pole in Volts | 120.0 AC ALL LOCATIONS |
| Mounting Facility Type and Quantity | 8 THREADED STUD(S) |
| Frequency in Hertz | 60.0 ALL LOCATIONS |
| Unpackaged Unit Weight | 0.88 POUNDS NOMINAL LBS |
| Body Style | MULTIPOLE-MULTIPLE ACTUATOR TYPE |
| Pole Quantity | 4 |
| Maximum Continuous Load Current Rating Per Pole | 40.0 AMPERES AC ALL LOCATIONS |
| Trip Release Characteristic | TIME DELAY ALL LOCATIONS |
| Manual Actuator Type and Quantity | 4 TOGGLE |
| Inclosure Protection Type for Which Designed | HUMIDITY RESISTANT AND SHOCK RESISTANT AND VIBRATION RESISTANT |
| Trip Release Ambient Temp Rating | 40.0 CELSIUS MINIMUM AND 85.0 CELSIUS MAXIMUM ALL LOCATIONS DEGC |
| Terminal Type and Quantity | 8 THREADED STUD |
| Trip Release Method | MAGNETIC-HYDRAULIC ALL LOCATIONS |
| Reference Number Differentiating Characteristics | SUGGESTED SOURCE OF SUPPLY |
| Center to Center Distance Between Terminals Parallel to Length | 19.05 MILLIMETERS NOMINAL MM |
| 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 |
|---|---|
| AM4R-Y57-1 | Heinemann Electric Canada Incdivision of Eaton Corp (CAN) |
| Reference | Meaning |
|---|---|
| AM4R-A16A2A3A3-LC-07-K-A-07-40-- | 5/1 Secondary reference U.S. Government activity |
| AM4R-A16A2A3A3-LC07D-A07-40-1/1- | 5/1 Secondary reference Heinemann Electric Canada Incdivision of Eaton Corp |
| AM4R-Y57-1 | 5/2 Secondary reference U.S. Government activity |
| AM4R-A16A2A3A3-LC07D-A07-40-1/1- | 3/1 Design control — primary reference U.S. Government activity |
NSN 5925-01-698-6777 is a Circuit Breaker, manufactured by Heinemann Electric Canada Incdivision of Eaton Corp, classified under FSC 5925, Circuit Breakers. Status: active.
NSN 5925-01-698-6777 has 1 manufacturer part number on file: AM4R-Y57-1 (Heinemann Electric Canada Incdivision of Eaton Corp).
Key specifications for AM4R-Y57-1: Reset Method: ELECTRIC; Internal Trip Release Configuration: SERIES TRIP ALL LOCATIONS; Operating Voltage Type and Rating Per Pole in Volts: 120.0 AC ALL LOCATIONS; Mounting Facility Type and Quantity: 8 THREADED STUD(S). 17 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.