The Relay,electromagnetic, cataloged under National Stock Number 5945-00-252-0991, 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 12 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5945-00-252-0991 |
| Primary Part Number | 1AQ4120 |
| Item Name | Relay,electromagnetic |
| FSC / FSG | 5945 / 59 — Relays and Solenoids |
| Manufacturer | Westinghouse Electric Corp |
| Status | ACTIVE |
| Nonpile-Up Auxiliary Contact Arrangement | 1 POLE, SINGLE THROW, NORMALLY CLOSED, MOMENTARY ACTION |
| Main Contact Maximum Voltage Rating in Volts | 125.0 DC |
| Main Contact Load Current Rating at Maximum Rated Voltage | 150.0 AMPERES DC RESISTIVE LOAD |
| Duty Type | CONTINUOUS |
| Winding DC Resistance Rating | 1.1 KILOHMS MINIMUM FIRST WINDING |
| Winding DC Resistance Rating | 745.0 OHMS MAXIMUM SECOND WINDING |
| Time Delay | 0.50 SECONDS MINIMUM AND 3.50 SECONDS MAXIMUM ADJUSTABLE RELEASE TIME |
| Coil Quantity | 1 |
| Winding Quantity | 2 |
| Operating Voltage Rating and Type at Specified Temp | 250.0 VOLTS DC 25 DEG CELSIUS ALL WINDINGS |
| Nonpile-Up Main Contact Arrangement | 2 POLE, SINGLE THROW, NORMALLY OPEN, MOMENTARY ACTION |
| Auxiliary Contact Maximum Voltage Rating in Volts | 125.0 DC |
| 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 |
|---|---|
| 1AQ4120 | Westinghouse Electric Corp (USA) |
| Reference | Meaning |
|---|---|
| 37J890REV8 | 5/9 Secondary reference Westinghouse Electric Corp Power Generation-Generator Div |
| 37J890REV8 | 3/1 Design control — primary reference Westinghouse Electric Corp |
| 1AQ4120 | 5/9 Secondary reference Westinghouse Electric Corp Power Generation-Generator Div |
| 37J890 | 5/1 Secondary reference Westinghouse Electric Corp |
NSN 5945-00-252-0991 is a Relay,electromagnetic, manufactured by Westinghouse Electric Corp, classified under FSC 5945, Relays and Solenoids. Status: active.
NSN 5945-00-252-0991 has 1 manufacturer part number on file: 1AQ4120 (Westinghouse Electric Corp).
Key specifications for 1AQ4120: Nonpile-Up Auxiliary Contact Arrangement: 1 POLE, SINGLE THROW, NORMALLY CLOSED, MOMENTARY ACTION; Overall Height: 5.280 INCHES NOMINAL IN; Main Contact Maximum Voltage Rating in Volts: 125.0 DC; Main Contact Load Current Rating at Maximum Rated Voltage: 150.0 AMPERES DC RESISTIVE LOAD. 12 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.