The Circuit Breaker, cataloged under National Stock Number 5925-01-031-9909, is classified within Federal Supply Class 5925 (Circuit Breakers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 29 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5925-01-031-9909 |
| Primary Part Number | 2664992-1 |
| Item Name | Circuit Breaker |
| FSC / FSG | 5925 / 59 — Circuit Breakers |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | ACTIVE |
| Reset Method | MANUAL |
| Operating Voltage Type and Rating Per Pole in Volts | 500.0 AC AND 250.0 DC ALL LOCATIONS |
| Mounting Facility Type and Quantity | 4 THREADED HOLE(S) |
| Actuator Position Designation | AT POLE TWO |
| Frequency in Hertz | 60.0 ALL LOCATIONS |
| Center to Center Distance Between Terminals Parallel to Width | 3.000 INCHES NOMINAL IN |
| Body Style | MULTIPOLE-SINGLE ACTUATOR TYPE |
| Ultimate Trip Rating of Continuous Current Rating Per Pole in Percent | 138.0 ALL LOCATIONS |
| Distance Between Centerlines of Mounting Facilities Parallel to Body Length | 9.875 INCHES NOMINAL IN |
| Circuit Protection Type | OVERCURRENT ALL LOCATIONS |
| Body Width | 9.000 INCHES MAXIMUM IN |
| Pole Quantity | 3 |
| Mounting Surface to Terminal End Distance | 9.312 INCHES MAXIMUM IN |
| Maximum Continuous Load Current Rating Per Pole | 125.0 AMPERES AC AND 125.0 AMPERES DC ALL LOCATIONS |
| Trip Release Characteristic | INSTANTANEOUS ALL LOCATIONS |
| Maximum Interrupting Capacity Current Type and Rating Per Pole in Amps | 15000.0 AC AND 20000.0 DC ALL LOCATIONS |
| Nominal Thread Size | 0.250 INCHES IN |
| Body Length | 11.000 INCHES MAXIMUM IN |
| Manual Actuator Type and Quantity | 1 TOGGLE |
| Distance Between Centerlines of Mounting Facilities Parallel to Body Width | 3.000 INCHES NOMINAL IN |
| Inclosure Protection Type for Which Designed | FUNGUS RESISTANT |
| Thread Quantity Per Inch | 20 |
| Material | PLASTIC CASE |
| Actuator Function | TRIP-RESET |
| Trip Release Ambient Temp Rating | 50.0 CELSIUS NOMINAL ALL LOCATIONS DEGC |
| Terminal Type and Quantity | 6 THREADED STUD |
| Main Contact Tripping Mechanism Type | TRIP FREE |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Boss Height | 0.250 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | N |
| Part Number | Manufacturer |
|---|---|
| 2664992-1 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| ETN5953 SEE REMARKS REPLACEMENT PRIMARY | L3harris Maritime Services Inc (USA) |
| Reference | Meaning |
|---|---|
| ETN5953 | 5/9 Secondary reference Pacord Inc Div Norfolk |
| S313C682G19 | 5/2 Secondary reference U.S. Government activity |
| AQB-A250/125NM | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| ETN5953 | 5/1 Secondary reference L3harris Maritime Power & Energy Solutions, Inc. Dba Spd Electrical Systems, Inc. |
| 313C682G19 | 5/1 Secondary reference U.S. Government activity |
| AQB-A250-125AMP | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 37197-572 | 5/2 Secondary reference U.S. Government activity |
NSN 5925-01-031-9909 is a Circuit Breaker, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 5925, Circuit Breakers. Status: active.
NSN 5925-01-031-9909 has 2 manufacturer part numbers on file: 2664992-1 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), ETN5953 SEE REMARKS REPLACEMENT (L3harris Maritime Services Inc).
Key specifications for 2664992-1: Reset Method: MANUAL; Operating Voltage Type and Rating Per Pole in Volts: 500.0 AC AND 250.0 DC ALL LOCATIONS; Mounting Facility Type and Quantity: 4 THREADED HOLE(S); Actuator Position Designation: AT POLE TWO. 29 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.