The Circuit Breaker Swi, cataloged under National Stock Number 4920-01-505-2231, is classified within Federal Supply Class 4920 (Aircraft Maintenance and Repair Shop Specialized Equipment) of the Maintenance and Repair Shop Equipment group. The manufacturer of record is Carling Technologies, Inc Dba Carlingswitch. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4920-01-505-2231 |
| Primary Part Number | AA1-A0-03-630-1D1-C |
| Item Name | Circuit Breaker Swi |
| FSC / FSG | 4920 / 49 — Aircraft Maintenance and Repair Shop Specialized Equipment |
| Manufacturer | Carling Technologies, Inc Dba Carlingswitch |
| Status | ACTIVE |
| Criticality Code Justification | AGAV |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| AA1-A0-03-630-1D1-C PRIMARY | Carling Technologies, Inc Dba Carlingswitch (USA) |
| NRAS1000 | Idec Systems and Controls Corp (USA) |
| Reference | Meaning |
|---|---|
| 738248 | 5/2 Secondary reference U.S. Government activity |
| 500K2248 | 5/9 Secondary reference U.S. Government activity |
| 500K2248 | 5/9 Secondary reference Drs Environmental Systems Inc |
| 500K2248 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 4920-01-505-2231 is a Circuit Breaker Swi, manufactured by Carling Technologies, Inc Dba Carlingswitch, classified under FSC 4920, Aircraft Maintenance and Repair Shop Specialized Equipment. Status: active.
NSN 4920-01-505-2231 has 2 manufacturer part numbers on file: AA1-A0-03-630-1D1-C (Carling Technologies, Inc Dba Carlingswitch), NRAS1000 (Idec Systems and Controls Corp).
Key specifications for AA1-A0-03-630-1D1-C: Criticality Code Justification: AGAV; Part Name Assigned by Controlling Agency: INAVY - CIRCUIT BREAKER SWITCH; End Item Identification: CONSOLIDATED AUTOMATED SUPPORT SYSTEM (CASS) USM-636 ELECTRICAL EQUIPMENT TEST SYSTEM. 1 specification is documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). 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.