The Circuit Breaker, cataloged under National Stock Number 5925-00-024-0434, is classified within Federal Supply Class 5925 (Circuit Breakers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Lockheed Martin Corporation Div Rms - Mitchel Field. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5925-00-024-0434 |
| Primary Part Number | 1201398-4 |
| Item Name | Circuit Breaker |
| FSC / FSG | 5925 / 59 — Circuit Breakers |
| Manufacturer | Lockheed Martin Corporation Div Rms - Mitchel Field |
| Status | ACTIVE |
| Reset Method | MANUAL |
| Internal Trip Release Configuration | SERIES TRIP SINGLE LOCATION |
| Operating Voltage Type and Rating Per Pole in Volts | 250.0 AC SINGLE LOCATION |
| Mounting Facility Type and Quantity | 2 THREADED HOLE(S) |
| Actuator Position Designation | AT POLE ONE |
| Frequency in Hertz | 400.0 SINGLE LOCATION |
| Fragility Factor | MODERATELY RUGGED |
| Body Style | SINGLE POLE TYPE |
| Ultimate Trip Rating of Continuous Current Rating Per Pole in Percent | 150.0 SINGLE LOCATION |
| Distance Between Centerlines of Mounting Facilities Parallel to Body Length | 1.655 INCHES MINIMUM AND 1.665 INCHES MAXIMUM IN |
| Arc Quenching Method | MAGNETIC BLOWOUT |
| Circuit Protection Type | OVERCURRENT SINGLE LOCATION |
| Body Width | 0.745 INCHES MINIMUM AND 0.755 INCHES MAXIMUM IN |
| Storage Type | GENERAL PURPOSE WAREHOUSE |
| Pole Quantity | 1 |
| Mounting Surface to Terminal End Distance | 1.875 INCHES MINIMUM AND 1.885 INCHES MAXIMUM IN |
| Maximum Continuous Load Current Rating Per Pole | 20.0 AMPERES AC SINGLE LOCATION |
| Trip Release Characteristic | INSTANTANEOUS SINGLE LOCATION |
| Maximum Interrupting Capacity Current Type and Rating Per Pole in Amps | 1000.0 AC SINGLE LOCATION |
| Nominal Thread Size | 0.138 INCHES IN |
| Body Length | 1.985 INCHES MINIMUM AND 2.015 INCHES MAXIMUM IN |
| Inclosure Protection Type for Which Designed | DUSTPROOF AND FUNGUS PROOF |
| Thread Quantity Per Inch | 32 |
| Material | PLASTIC CASE |
| Actuator Function | TRIP-RESET |
| Terminal Type and Quantity | 2 TAB, SOLDER LUG |
| Main Contact Tripping Mechanism Type | TRIP FREE |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Boss Height | 0.125 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN |
| Trip Release Method | MAGNETIC-HYDRAULIC SINGLE LOCATION |
| 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 |
|---|---|
| 1201398-4 PRIMARY | Lockheed Martin Corporation Div Rms - Mitchel Field (USA) |
| Reference | Meaning |
|---|---|
| JA-1-C3-20 | 5/9 Secondary reference Eaton Corp Heinemann Products Commercial Controls Div |
| JA1-C3-20-P | 5/9 Secondary reference Eaton Corp Heinemann Products Commercial Controls Div |
NSN 5925-00-024-0434 is a Circuit Breaker, manufactured by Lockheed Martin Corporation Div Rms - Mitchel Field, classified under FSC 5925, Circuit Breakers. Status: active.
NSN 5925-00-024-0434 has 1 manufacturer part number on file: 1201398-4 (Lockheed Martin Corporation Div Rms - Mitchel Field).
Key specifications for 1201398-4: Reset Method: MANUAL; Internal Trip Release Configuration: SERIES TRIP SINGLE LOCATION; Operating Voltage Type and Rating Per Pole in Volts: 250.0 AC SINGLE LOCATION; Mounting Facility Type and Quantity: 2 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.