The Relay,electromagnetic, cataloged under National Stock Number 5945-00-552-3385, is classified within Federal Supply Class 5945 (Relays and Solenoids) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Ward Leonard Ct Llc. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 11 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5945-00-552-3385 |
| Primary Part Number | K43021 |
| Item Name | Relay,electromagnetic |
| FSC / FSG | 5945 / 59 — Relays and Solenoids |
| Manufacturer | Ward Leonard Ct Llc |
| Status | ACTIVE |
| Mounting Facility Type and Quantity | 3 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY |
| Main Contact Maximum Voltage Rating in Volts | 440.0 AC |
| Fragility Factor | MODERATELY RUGGED |
| Mounting Facility Pattern | TRIANGLE SINGLE MOUNTING FACILITY |
| Center to Center Distance Between Mounting Facilities Parallel to Length | 4.875 INCHES NOMINAL SINGLE MOUNTING FACILITY IN |
| Main Contact Load Current Rating at Maximum Rated Voltage | 15.0 AMPERES AC RESISTIVE LOAD |
| Duty Type | CONTINUOUS |
| Storage Type | GENERAL PURPOSE WAREHOUSE |
| Unthreaded Mounting Hole Diameter | 0.281 INCHES NOMINAL SINGLE MOUNTING FACILITY IN |
| Center to Center Distance Between Mounting Facilities Parallel to the Altitude of an Isosceles Triangle | 5.750 INCHES NOMINAL SINGLE MOUNTING FACILITY IN |
| Frequency in Hertz | 60.0 NOMINAL |
| Coil Quantity | 1 |
| Cubic Measure | 104.774 CUBIC INCHES |
| Winding Quantity | 1 |
| Operating Voltage Rating and Type at Specified Temp | 440.0 VOLTS AC 25 DEG CELSIUS SINGLE WINDING |
| Center to Center Distance Between Mounting Facilities Parallel to Width | 4.625 INCHES NOMINAL SINGLE MOUNTING FACILITY IN |
| Terminal Type and Quantity | 5 WIRE HOOK ALL FUNCTIONS |
| Nonpile-Up Main Contact Arrangement | 3 POLE, DOUBLE THROW, ONE POSITION MOMENTARY |
| Purpose for Which Designed | GENERAL |
| 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 |
|---|---|
| K43021 | Ward Leonard Ct Llc (USA) |
| K43021-1 | Ward Leonard Ct Llc (USA) |
| Reference | Meaning |
|---|---|
| K-43021.1--ALL | C/1 Advisory reference — outside the item-of-supply concept Ward Leonard Ct Llc |
| 3695-03REVBLINE288 | 5/2 Secondary reference U.S. Government activity |
| 571-6202-1301776REVBLINE288 | 5/2 Secondary reference U.S. Government activity |
| 3402-3207444REVAPC2 | 5/2 Secondary reference U.S. Government activity |
| 3657-158REVCPC14 | 5/2 Secondary reference U.S. Government activity |
| 2995-03LINE406 | 5/9 Secondary reference U.S. Government activity |
| 571-3402-1303154REVAPCKPA123-3 | 5/2 Secondary reference U.S. Government activity |
| 563-3402-1183530PC2 | 5/2 Secondary reference U.S. Government activity |
| 575-3402-1444399REVAPC2 | 3/2 Design control — primary reference U.S. Government activity |
| 564-3101-937728LINE406 | 5/2 Secondary reference U.S. Government activity |
| 571-3402-1444459REVCPC14 | 5/2 Secondary reference U.S. Government activity |
NSN 5945-00-552-3385 is a Relay,electromagnetic, manufactured by Ward Leonard Ct Llc, classified under FSC 5945, Relays and Solenoids. Status: active.
NSN 5945-00-552-3385 has 2 manufacturer part numbers on file: K43021 (Ward Leonard Ct Llc), K43021-1 (Ward Leonard Ct Llc).
Key specifications for K43021: Mounting Facility Type and Quantity: 3 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY; Overall Height: 3.313 INCHES NOMINAL IN; Main Contact Maximum Voltage Rating in Volts: 440.0 AC; Fragility Factor: MODERATELY RUGGED. 19 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.