The Relay,thermal, cataloged under National Stock Number 5945-00-643-6406, is classified within Federal Supply Class 5945 (Relays and Solenoids) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Westinghouse Electric Corp. Government technical data includes 9 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5945-00-643-6406 |
| Primary Part Number | 102990 |
| Item Name | Relay,thermal |
| FSC / FSG | 5945 / 59 — Relays and Solenoids |
| Manufacturer | Westinghouse Electric Corp |
| Status | ACTIVE |
| Mounting Facility Type and Quantity | 1 OCTAL BASE PLUG-IN |
| Contact Maximum Voltage Rating in Volts | 250.0 AC |
| Contact Arrangement | SINGLE POLE, SINGLE THROW, NORMALLY OPEN |
| Overall Diameter | 1.175 INCHES NOMINAL IN |
| Heater Power Rating in Watts | 5.0 |
| Heater Voltage Rating in Volts | 6.3 |
| Contact Maximum Current Rating in Amps | 3.0 AC |
| Environmental Protection | HUMIDITY PROOF |
| Terminal Type and Quantity | 7 WIRE HOOK |
| 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 |
|---|---|
| 102990 | Westinghouse Electric Corp (USA) |
| Reference | Meaning |
|---|---|
| B1843 | 5/9 Secondary reference Meggitt (new Hampshire), Inc |
| 501B2022 | 5/9 Secondary reference Meggitt (new Hampshire), Inc |
| 102990 | 3/9 Design control — primary reference Meggitt (new Hampshire), Inc |
NSN 5945-00-643-6406 is a Relay,thermal, manufactured by Westinghouse Electric Corp, classified under FSC 5945, Relays and Solenoids. Status: active.
NSN 5945-00-643-6406 has 1 manufacturer part number on file: 102990 (Westinghouse Electric Corp).
3 possible matches (shared part number, not a government interchangeability claim): 5330-00-897-3825, 5310-01-394-7896, 1660-01-594-6233. Verify interchangeability with system specifications before substitution.
Key specifications for 102990: Mounting Facility Type and Quantity: 1 OCTAL BASE PLUG-IN; Contact Maximum Voltage Rating in Volts: 250.0 AC; Contact Arrangement: SINGLE POLE, SINGLE THROW, NORMALLY OPEN; Overall Diameter: 1.175 INCHES NOMINAL IN. 9 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.