The Relay,electromagnetic, cataloged under National Stock Number 5945-01-089-0657, is classified within Federal Supply Class 5945 (Relays and Solenoids) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Ross Engineering Corporation Dba Ross Engineering Corp. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5945-01-089-0657 |
| Primary Part Number | 581R943H04 |
| Item Name | Relay,electromagnetic |
| FSC / FSG | 5945 / 59 — Relays and Solenoids |
| Manufacturer | Ross Engineering Corporation Dba Ross Engineering Corp |
| Status | ACTIVE |
| Nonpile-Up Auxiliary Contact Arrangement | 2 POLE, DOUBLE THROW, BOTH POSITIONS MAINTAINED |
| Main Contact Maximum Voltage Rating in Volts | 120000.0 DC |
| Main Contact Load Current Rating at Maximum Rated Voltage | 40.0 AMPERES DC RESISTIVE LOAD |
| Auxiliary Contact Load Current Rating at Maximum Rated Voltage | 10.0 AMPERES DC RESISTIVE LOAD |
| Environmental Protection | SHOCK RESISTANT AND VIBRATION RESISTANT |
| Operating Voltage Rating and Type at Specified Temp | 26.5 VOLTS DC 25 DEG CELSIUS ALL WINDINGS |
| Terminal Type and Quantity | 11 TAB, SOLDER LUG CONTACTS |
| Nonpile-Up Main Contact Arrangement | 2 POLE, DOUBLE THROW, BOTH POSITIONS MAINTAINED AND 2 POLE, DOUBLE THROW, ONE POSITION MOMENTARY |
| Auxiliary Contact Maximum Voltage Rating in Volts | 28.0 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 |
|---|---|
| 581R943H04 | Ross Engineering Corporation Dba Ross Engineering Corp (USA) |
| Reference | Meaning |
|---|---|
| 581R943H04 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5945-01-089-0657 is a Relay,electromagnetic, manufactured by Ross Engineering Corporation Dba Ross Engineering Corp, classified under FSC 5945, Relays and Solenoids. Status: active.
NSN 5945-01-089-0657 has 1 manufacturer part number on file: 581R943H04 (Ross Engineering Corporation Dba Ross Engineering Corp).
Key specifications for 581R943H04: Nonpile-Up Auxiliary Contact Arrangement: 2 POLE, DOUBLE THROW, BOTH POSITIONS MAINTAINED; Overall Height: 5.000 INCHES NOMINAL IN; Main Contact Maximum Voltage Rating in Volts: 120000.0 DC; Main Contact Load Current Rating at Maximum Rated Voltage: 40.0 AMPERES DC RESISTIVE LOAD. 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.