The Relay,electromagnetic, cataloged under National Stock Number 5945-01-327-9742, is classified within Federal Supply Class 5945 (Relays and Solenoids) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Dynalec Corporation. Government technical data includes 20 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5945-01-327-9742 |
| Primary Part Number | RY4S-U-DC24V |
| Item Name | Relay,electromagnetic |
| FSC / FSG | 5945 / 59 — Relays and Solenoids |
| Manufacturer | Dynalec Corporation |
| Status | ACTIVE |
| Mounting Facility Type and Quantity | 1 TERMINAL SINGLE MOUNTING FACILITY |
| Main Contact Maximum Voltage Rating in Volts | 240.0 AC AND 110.0 DC |
| Fragility Factor | MODERATELY RUGGED |
| Arc Quenching Method | AIR |
| Precious Material | GOLD AND SILVER |
| Main Contact Load Current Rating at Maximum Rated Voltage | 3.0 AMPERES AC AND 200.0 MILLIAMPERES DC RESISTIVE LOAD |
| Main Contact Load Current Rating at Maximum Rated Voltage | 800.0 MILLIAMPERES AC INDUCTIVE LOAD |
| Duty Type | CONTINUOUS |
| Storage Type | GENERAL PURPOSE WAREHOUSE |
| Winding DC Resistance Rating | 650.0 OHMS NOMINAL SINGLE WINDING |
| Time Delay | 0.02 SECONDS MAXIMUM FIXED OPERATE AND RELEASE TIME |
| Coil Quantity | 1 |
| Surface Treatment | GOLD CONTACT |
| Precious Material and Location | CONTACT SURFACES GOLD AND CONTACTS SILVER |
| Winding Quantity | 1 |
| Operating Voltage Rating and Type at Specified Temp | 24.0 VOLTS DC 25 DEG CELSIUS SINGLE WINDING |
| Material | SILVER CONTACT |
| Terminal Type and Quantity | 14 TAB, SOLDER LUG ALL FUNCTIONS |
| Nonpile-Up Main Contact Arrangement | 4 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 |
|---|---|
| RY4S-U-DC24V PRIMARY | Dynalec Corporation (USA) |
| Reference | Meaning |
|---|---|
| RY4S-U-DC24V | 5/9 Secondary reference Idec Systems and Controls Corp |
| 4011110 | 5/9 Secondary reference Sweo Controls Inc Dba Baldor Sweo Drive |
NSN 5945-01-327-9742 is a Relay,electromagnetic, manufactured by Dynalec Corporation, classified under FSC 5945, Relays and Solenoids. Status: active.
NSN 5945-01-327-9742 has 1 manufacturer part number on file: RY4S-U-DC24V (Dynalec Corporation).
Key specifications for RY4S-U-DC24V: Mounting Facility Type and Quantity: 1 TERMINAL SINGLE MOUNTING FACILITY; Overall Height: 1.403 INCHES MAXIMUM IN; Main Contact Maximum Voltage Rating in Volts: 240.0 AC AND 110.0 DC; Fragility Factor: MODERATELY RUGGED. 20 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.