The Fuseholder,block, cataloged under National Stock Number 5920-01-552-6331, is classified within Federal Supply Class 5920 (Fuses, Arrestors, Absorbers, and Protectors) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Mersen Usa Ep Corp. Dba Ferraz Shawmut. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5920-01-552-6331 |
| Primary Part Number | USM3I |
| Item Name | Fuseholder,block |
| FSC / FSG | 5920 / 59 — Fuses, Arrestors, Absorbers, and Protectors |
| Manufacturer | Mersen Usa Ep Corp. Dba Ferraz Shawmut |
| Status | ACTIVE |
| 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 |
|---|---|
| USM3I PRIMARY | Mersen Usa Ep Corp. Dba Ferraz Shawmut (USA) |
| PA20397/2150 ITEM 28 | Alstom Power Conversion Inc. (USA) |
| CAT CUT USCC & USM / PN-USM3I | Mersen Usa Ep Corp. Dba Ferraz Shawmut (USA) |
NSN 5920-01-552-6331 is a Fuseholder,block, manufactured by Mersen Usa Ep Corp. Dba Ferraz Shawmut, classified under FSC 5920, Fuses, Arrestors, Absorbers, and Protectors. Status: active.
NSN 5920-01-552-6331 has 3 manufacturer part numbers on file: USM3I (Mersen Usa Ep Corp. Dba Ferraz Shawmut), PA20397/2150 ITEM 28 (Alstom Power Conversion Inc.), CAT CUT USCC & USM / PN-USM3I (Mersen Usa Ep Corp. Dba Ferraz Shawmut).
Key specifications for USM3I: Special Features: END ITEM: CONTROL CUBICLE, ITEM IS 3 POLE WITH INDICATORS.ITEM IS 2.070 INCH WIDE BY 2.320 INCH DEEP.ITEM TO BE USED WITH MIDGET 1-1/2 INCH BY 13/32 INCH FUSE. IN. 0 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.