The Arrester,electrical Surge, cataloged under National Stock Number 5920-01-243-3633, 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 Siemens Corp. Government technical data includes 8 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5920-01-243-3633 |
| Primary Part Number | B2B470Y23 |
| Item Name | Arrester,electrical Surge |
| FSC / FSG | 5920 / 59 — Fuses, Arrestors, Absorbers, and Protectors |
| Manufacturer | Siemens Corp |
| Status | ACTIVE |
| Terminal Quantity | 2 |
| Usage Design | INDOOR |
| Terminal Type | WIRE LEAD |
| Overall Diameter | 0.380 INCHES NOMINAL IN |
| Mounting Method | WIRE LEAD TERMINAL(S) |
| Breakdown Voltage | 450.000 VOLTS NOMINAL |
| Arrester Type | GAS |
| Mounting Configuration | TWO 0.775 IN. LG,0.032 IN. DIA WIRE LEADS IN |
| 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 |
|---|---|
| B2B470Y23 | Siemens Corp (USA) |
| Reference | Meaning |
|---|---|
| 442723 | 3/2 Design control — primary reference U.S. Government activity |
| 442723 | 5/9 Secondary reference Cp Clare Corp North American Sales Operations |
NSN 5920-01-243-3633 is a Arrester,electrical Surge, manufactured by Siemens Corp, classified under FSC 5920, Fuses, Arrestors, Absorbers, and Protectors. Status: active.
NSN 5920-01-243-3633 has 1 manufacturer part number on file: B2B470Y23 (Siemens Corp).
1 possible match (shared part number, not a government interchangeability claim): 4720-01-382-3202. Verify interchangeability with system specifications before substitution.
Key specifications for B2B470Y23: Terminal Quantity: 2; Usage Design: INDOOR; Terminal Type: WIRE LEAD; Overall Diameter: 0.380 INCHES NOMINAL IN. 8 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.