The Relay,electromagnetic, cataloged under National Stock Number 5945-01-040-0052, is classified within Federal Supply Class 5945 (Relays and Solenoids) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Guardian Electric Manufacturing Co Div Guardian Electric Mfg Co. Government technical data includes 13 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5945-01-040-0052 |
| Primary Part Number | IR-645U-4C-12WIRE |
| Item Name | Relay,electromagnetic |
| FSC / FSG | 5945 / 59 — Relays and Solenoids |
| Manufacturer | Guardian Electric Manufacturing Co Div Guardian Electric Mfg Co |
| Status | ACTIVE |
| Mounting Facility Type and Quantity | 1 THREADED HOLE(S) SINGLE MOUNTING FACILITY |
| Precious Material | SILVER |
| Main Contact Load Current Rating at Maximum Rated Voltage | 10.0 AMPERES DC RESISTIVE LOAD |
| Duty Type | CONTINUOUS |
| Nominal Operating Current Rating and Type | 5.0 AMPERES DC SINGLE WINDING |
| Nominal Thread Size | 0.164 INCHES SINGLE MOUNTING FACILITY IN |
| Coil Quantity | 1 |
| Precious Material and Location | CONTACTS SILVER |
| Winding Quantity | 1 |
| Thread Class | 2B SINGLE MOUNTING FACILITY |
| Terminal Type and Quantity | 14 PIN ALL FUNCTIONS |
| Nonpile-Up Main Contact Arrangement | 4 POLE, DOUBLE THROW, ONE POSITION MOMENTARY |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) SINGLE MOUNTING FACILITY |
| 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 |
|---|---|
| IR-645U-4C-12WIRE PRIMARY | Guardian Electric Manufacturing Co Div Guardian Electric Mfg Co (USA) |
| Reference | Meaning |
|---|---|
| 54174-90034 | 5/9 Secondary reference U.S. Government activity |
NSN 5945-01-040-0052 is a Relay,electromagnetic, manufactured by Guardian Electric Manufacturing Co Div Guardian Electric Mfg Co, classified under FSC 5945, Relays and Solenoids. Status: active.
NSN 5945-01-040-0052 has 1 manufacturer part number on file: IR-645U-4C-12WIRE (Guardian Electric Manufacturing Co Div Guardian Electric Mfg Co).
Key specifications for IR-645U-4C-12WIRE: Mounting Facility Type and Quantity: 1 THREADED HOLE(S) SINGLE MOUNTING FACILITY; Overall Height: 2.156 INCHES NOMINAL IN; Precious Material: SILVER; Main Contact Load Current Rating at Maximum Rated Voltage: 10.0 AMPERES DC RESISTIVE LOAD. 13 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.