The Circuit Breaker, cataloged under National Stock Number 5925-01-138-1333, is classified within Federal Supply Class 5925 (Circuit Breakers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Mjo Industries, Inc. Dba Hughes-Peters Div Hughes Peters. Government technical data includes 30 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5925-01-138-1333 |
| Primary Part Number | AM3R-Z29-102 |
| Item Name | Circuit Breaker |
| FSC / FSG | 5925 / 59 — Circuit Breakers |
| Manufacturer | Mjo Industries, Inc. Dba Hughes-Peters Div Hughes Peters |
| Status | ACTIVE |
| 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 | 6 THREADED HOLE(S) |
| Actuator Position Designation | AT EACH POLE |
| Ultimate Trip Time Per Pole in Seconds | 0.700 MINIMUM ALL LOCATIONS |
| Frequency in Hertz | 50.0 OR 60.0 ALL LOCATIONS |
| Center to Center Distance Between Terminals Parallel to Width | 0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN |
| Fragility Factor | MODERATELY RUGGED |
| Body Style | MULTIPOLE-MULTIPLE ACTUATOR TYPE |
| Ultimate Trip Rating of Continuous Current Rating Per Pole in Percent | 125.0 ALL LOCATIONS |
| External Actuator Linkage Arrangement | ONE, TWO, AND THREE LINKED |
| Distance Between Centerlines of Mounting Facilities Parallel to Body Length | 2.052 INCHES MINIMUM AND 2.072 INCHES MAXIMUM IN |
| Arc Quenching Method | MAGNETIC BLOWOUT |
| Circuit Protection Type | OVERCURRENT ALL LOCATIONS |
| Body Width | 2.240 INCHES MINIMUM AND 2.251 INCHES MAXIMUM IN |
| Storage Type | GENERAL PURPOSE WAREHOUSE |
| Pole Quantity | 3 |
| Mounting Surface to Terminal End Distance | 2.461 INCHES MINIMUM AND 2.481 INCHES MAXIMUM IN |
| Maximum Continuous Load Current Rating Per Pole | 20.0 AMPERES AC ALL LOCATIONS |
| Features Provided | SLIDING BAR INTERLOCK |
| Trip Release Characteristic | TIME DELAY ALL LOCATIONS |
| Maximum Interrupting Capacity Current Type and Rating Per Pole in Amps | 5000.0 AC ALL LOCATIONS |
| Nominal Thread Size | 0.138 INCHES IN |
| Body Length | 2.490 INCHES MINIMUM AND 2.510 INCHES MAXIMUM IN |
| Trip Delay Time in Seconds Per Rated Continuous Current | 0.150 MINIMUM AT 200 PCT AND 1.500 MAXIMUM AT 200 PCT AND 0.030 MINIMUM AT 400 PCT AND 0.200 MAXIMUM AT 400 PCT ALL LOCATIONS |
| Manual Actuator Type and Quantity | 3 TOGGLE |
| Distance Between Centerlines of Mounting Facilities Parallel to Body Width | 0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN |
| Inclosure Protection Type for Which Designed | FUNGUS RESISTANT AND MOISTURE RESISTANT |
| Material | PLASTIC CASE |
| 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 |
|---|---|
| AM3R-Z29-102 | Mjo Industries, Inc. Dba Hughes-Peters Div Hughes Peters (USA) |
| Reference | Meaning |
|---|---|
| W93X11-3-20 | 3/9 Design control — primary reference Te Connectivity Corporation |
| AM3-A3-A-20-3 | 5/9 Secondary reference Eaton Corp Heinemann Products Commercial Controls Div |
| 804785-17 | 7/2 Vendor item drawing reference U.S. Government activity |
| AM3-Z29-102 | 5/9 Secondary reference Eaton Corp Heinemann Products Commercial Controls Div |
NSN 5925-01-138-1333 is a Circuit Breaker, manufactured by Mjo Industries, Inc. Dba Hughes-Peters Div Hughes Peters, classified under FSC 5925, Circuit Breakers. Status: active.
NSN 5925-01-138-1333 has 1 manufacturer part number on file: AM3R-Z29-102 (Mjo Industries, Inc. Dba Hughes-Peters Div Hughes Peters).
Key specifications for AM3R-Z29-102: 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: 6 THREADED HOLE(S). 30 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.