The Circuit Breaker Subassembly, cataloged under National Stock Number 5925-01-367-0220, is classified within Federal Supply Class 5925 (Circuit Breakers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Wesco Distribution, Inc. Div Harrisburg Pa. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5925-01-367-0220 |
| Primary Part Number | 1221C21G03 |
| Item Name | Circuit Breaker Subassembly |
| FSC / FSG | 5925 / 59 — Circuit Breakers |
| Manufacturer | Wesco Distribution, Inc. Div Harrisburg Pa |
| Status | ACTIVE |
| Component Type and Quantity | 1 PROTECTOR |
| 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 |
|---|---|
| 1221C21G03 PRIMARY | Wesco Distribution, Inc. Div Harrisburg Pa (USA) |
| Reference | Meaning |
|---|---|
| SPBST120A | 5/2 Secondary reference U.S. Government activity |
| 1221C21G03 | C/1 Advisory reference — outside the item-of-supply concept Westinghouse Electric Corp Low Voltage Breaker Div |
NSN 5925-01-367-0220 is a Circuit Breaker Subassembly, manufactured by Wesco Distribution, Inc. Div Harrisburg Pa, classified under FSC 5925, Circuit Breakers. Status: active.
NSN 5925-01-367-0220 has 1 manufacturer part number on file: 1221C21G03 (Wesco Distribution, Inc. Div Harrisburg Pa).
Key specifications for 1221C21G03: Component Type and Quantity: 1 PROTECTOR; End Item Identification: CIRCUIT BREAKER. 1 specification is 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.