The Circuit Breaker, cataloged under National Stock Number 5925-01-230-9272, is classified within Federal Supply Class 5925 (Circuit Breakers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Northrop Grumman Corp Electronic Systems Defensive System Div. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5925-01-230-9272 |
| Primary Part Number | CK0121-009 |
| Item Name | Circuit Breaker |
| FSC / FSG | 5925 / 59 — Circuit Breakers |
| Manufacturer | Northrop Grumman Corp Electronic Systems Defensive System Div |
| 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 |
| Frequency in Hertz | 50.0 OR 60.0 ALL LOCATIONS |
| Unpackaged Unit Weight | 2.000 POUNDS NOMINAL LBS |
| Center to Center Distance Between Terminals Parallel to Width | 1.026 INCHES NOMINAL IN |
| 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 | 2.750 INCHES NOMINAL IN |
| Arc Quenching Method | MAGNETIC BLOWOUT |
| Circuit Protection Type | OVERCURRENT ALL LOCATIONS |
| Body Width | 3.108 INCHES MAXIMUM IN |
| Storage Type | GENERAL PURPOSE WAREHOUSE |
| Pole Quantity | 3 |
| Mounting Surface to Terminal End Distance | 3.550 INCHES NOMINAL IN |
| Maximum Continuous Load Current Rating Per Pole | 60.0 AMPERES AC ALL LOCATIONS |
| Features Provided | HIGH INRUSH PROTECTION |
| 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 | 5.125 INCHES NOMINAL IN |
| Trip Delay Time in Seconds Per Rated Continuous Current | 0.100 MINIMUM AT 200 PCT AND 0.800 MAXIMUM AT 200 PCT ALL LOCATIONS |
| Manual Actuator Type and Quantity | 3 TOGGLE |
| Distance Between Centerlines of Mounting Facilities Parallel to Body Width | 1.026 INCHES NOMINAL IN |
| Inclosure Protection Type for Which Designed | FUNGUS RESISTANT AND MOISTURE RESISTANT |
| Thread Quantity Per Inch | 32 |
| 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 |
|---|---|
| CK0121-009 PRIMARY | Northrop Grumman Corp Electronic Systems Defensive System Div (USA) |
| Reference | Meaning |
|---|---|
| 209-3-1-61F-3-9-60 | 5/2 Secondary reference U.S. Government activity |
NSN 5925-01-230-9272 is a Circuit Breaker, manufactured by Northrop Grumman Corp Electronic Systems Defensive System Div, classified under FSC 5925, Circuit Breakers. Status: active.
NSN 5925-01-230-9272 has 1 manufacturer part number on file: CK0121-009 (Northrop Grumman Corp Electronic Systems Defensive System Div).
Key specifications for CK0121-009: 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.