The Relay,thermal, cataloged under National Stock Number 5945-00-259-4383, is classified within Federal Supply Class 5945 (Relays and Solenoids) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Meggitt (new Hampshire), Inc. 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. 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 | 5945-00-259-4383 |
| Primary Part Number | B1931 |
| Item Name | Relay,thermal |
| FSC / FSG | 5945 / 59 — Relays and Solenoids |
| Manufacturer | Meggitt (new Hampshire), Inc |
| Status | ACTIVE |
| Mounting Facility Type and Quantity | 1 OCTAL BASE PLUG-IN |
| Contact Maximum Voltage Rating in Volts | 26.5 DC |
| Delay Time in Seconds | 20.0 FIXED OPERATE NOMINAL |
| Contact Arrangement | SINGLE POLE, SINGLE THROW, NORMALLY CLOSED |
| Overall Diameter | 1.275 INCHES NOMINAL IN |
| Heater Voltage Rating in Volts | 26.5 |
| Contact Maximum Current Rating in Amps | 3.0 DC |
| Environmental Protection | HERMETIC |
| Terminal Type and Quantity | 4 PIN |
| 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 |
|---|---|
| B1931 PRIMARY | Meggitt (new Hampshire), Inc (USA) |
NSN 5945-00-259-4383 is a Relay,thermal, manufactured by Meggitt (new Hampshire), Inc, classified under FSC 5945, Relays and Solenoids. Status: active.
NSN 5945-00-259-4383 has 1 manufacturer part number on file: B1931 (Meggitt (new Hampshire), Inc).
1 possible match (shared part number, not a government interchangeability claim): 4010-01-617-3972. Verify interchangeability with system specifications before substitution.
Key specifications for B1931: Mounting Facility Type and Quantity: 1 OCTAL BASE PLUG-IN; Contact Maximum Voltage Rating in Volts: 26.5 DC; Delay Time in Seconds: 20.0 FIXED OPERATE NOMINAL; Contact Arrangement: SINGLE POLE, SINGLE THROW, NORMALLY CLOSED. 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.