The Relay,electromagnetic, cataloged under National Stock Number 5945-00-258-7800, is classified within Federal Supply Class 5945 (Relays and Solenoids) of the Electrical and Electronic Equipment Components group. Government technical data includes 26 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5945-00-258-7800 |
| Item Name | Relay,electromagnetic |
| FSC / FSG | 5945 / 59 — Relays and Solenoids |
| Status | ACTIVE |
| Mounting Facility Type and Quantity | 3 THREADED STUD(S) SINGLE MOUNTING FACILITY |
| Main Contact Maximum Voltage Rating in Volts | 120.0 AC AND 28.0 DC |
| Fragility Factor | MODERATELY RUGGED |
| Mounting Facility Pattern | TRIANGLE SINGLE MOUNTING FACILITY |
| Arc Quenching Method | INERT GAS |
| Precious Material | SILVER |
| Main Contact Load Current Rating at Maximum Rated Voltage | 5.0 AMPERES AC AND 5.0 AMPERES DC RESISTIVE LOAD |
| Thread Length | 0.328 INCHES NOMINAL SINGLE MOUNTING FACILITY IN |
| Duty Type | CONTINUOUS |
| Storage Type | GENERAL PURPOSE WAREHOUSE |
| Center to Center Distance Between Mounting Facilities Parallel to the Altitude of an Isosceles Triangle | 2.594 INCHES NOMINAL SINGLE MOUNTING FACILITY IN |
| Minimum Differential Electrical Operating Rating | 4.2 MILLIAMPERES |
| Winding DC Resistance Rating | 2.5 KILOHMS NOMINAL ALL WINDINGS |
| Features Provided | POLARIZED |
| Thread Direction | RIGHT-HAND SINGLE MOUNTING FACILITY |
| Nominal Thread Size | 0.164 INCHES SINGLE MOUNTING FACILITY IN |
| Coil Quantity | 2 |
| Environmental Protection | HERMETIC |
| Precious Material and Location | CONTACTS SILVER |
| Cubic Measure | 16.669 CUBIC INCHES |
| Winding Quantity | 2 |
| Center to Center Distance Between Mounting Facilities Parallel to Width | 0.813 INCHES NOMINAL SINGLE MOUNTING FACILITY IN |
| Thread Class | 2A SINGLE MOUNTING FACILITY A |
| Thread Quantity Per Inch | 32 SINGLE MOUNTING FACILITY |
| Material | COPPER ALLOY CASE |
| Material | SILVER CONTACT |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 6HX2A2A2500S12 | 3/9 Design control — primary reference Sigma Instruments Inc |
| 6HX2A2A91090 | 5/9 Secondary reference Sigma Instruments Inc |
| 6HX2A2A2500GDSIL | 5/9 Secondary reference Sigma Instruments Inc |
| 91090 | 5/9 Secondary reference Sigma Instruments Inc |
NSN 5945-00-258-7800 is a Relay,electromagnetic, classified under FSC 5945, Relays and Solenoids. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 2840-01-434-6272. Verify interchangeability with system specifications before substitution.
Key specifications for 5945-00-258-7800: Mounting Facility Type and Quantity: 3 THREADED STUD(S) SINGLE MOUNTING FACILITY; Overall Height: 2.500 INCHES NOMINAL IN; Main Contact Maximum Voltage Rating in Volts: 120.0 AC AND 28.0 DC; Fragility Factor: MODERATELY RUGGED. 26 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.