The Relay,electromagnetic, cataloged under National Stock Number 5945-01-475-3857, is classified within Federal Supply Class 5945 (Relays and Solenoids) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Abb Control Inc. Government technical data includes 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5945-01-475-3857 |
| Primary Part Number | TF42-20 |
| Item Name | Relay,electromagnetic |
| FSC / FSG | 5945 / 59 — Relays and Solenoids |
| Manufacturer | Abb Control Inc |
| Status | ACTIVE |
| Nonpile-Up Auxiliary Contact Arrangement | 1 POLE, SINGLE THROW, NORMALLY OPEN, MOMENTARY ACTION AND 1 POLE, SINGLE THROW, NORMALLY CLOSED, MOMENTARY ACTION |
| Main Contact Load Current Rating at Maximum Rated Voltage | 19.0 AMPERES AC RESISTIVE LOAD |
| Nonpile-Up Main Contact Arrangement | 3 POLE, SINGLE THROW, NORMALLY OPEN, MOMENTARY ACTION |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| TF42-20 PRIMARY | Abb Control Inc (USA) |
| Reference | Meaning |
|---|---|
| TA25DU19 | 5/9 Secondary reference Abb Control Inc |
NSN 5945-01-475-3857 is a Relay,electromagnetic, manufactured by Abb Control Inc, classified under FSC 5945, Relays and Solenoids. Status: active.
NSN 5945-01-475-3857 has 1 manufacturer part number on file: TF42-20 (Abb Control Inc).
1 possible match (shared part number, not a government interchangeability claim): 6110-01-483-1482. Verify interchangeability with system specifications before substitution.
Key specifications for TF42-20: Nonpile-Up Auxiliary Contact Arrangement: 1 POLE, SINGLE THROW, NORMALLY OPEN, MOMENTARY ACTION AND 1 POLE, SINGLE THROW, NORMALLY CLOSED, MOMENTARY ACTION; Main Contact Load Current Rating at Maximum Rated Voltage: 19.0 AMPERES AC RESISTIVE LOAD; Nonpile-Up Main Contact Arrangement: 3 POLE, SINGLE THROW, NORMALLY OPEN, MOMENTARY ACTION. 3 specifications are 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.