The Relay,electromagnetic, cataloged under National Stock Number 5945-01-074-1965, is classified within Federal Supply Class 5945 (Relays and Solenoids) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Esna, Llc. Government technical data includes 21 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5945-01-074-1965 |
| Primary Part Number | 74120BN |
| Item Name | Relay,electromagnetic |
| FSC / FSG | 5945 / 59 — Relays and Solenoids |
| Manufacturer | Esna, Llc |
| Status | ACTIVE |
| Mounting Facility Type and Quantity | 4 THREADED HOLE(S) SINGLE MOUNTING FACILITY |
| Main Contact Maximum Voltage Rating in Volts | 480.0 AC AND 110.0 DC |
| Mounting Facility Pattern | RECTANGULAR SINGLE MOUNTING FACILITY |
| Center to Center Distance Between Mounting Facilities Parallel to Length | 0.500 INCHES NOMINAL SINGLE MOUNTING FACILITY IN |
| Precious Material | GOLD AND SILVER |
| Main Contact Load Current Rating at Maximum Rated Voltage | 2.5 AMPERES AC AND 1.0 AMPERES DC RESISTIVE LOAD |
| Duty Type | CONTINUOUS |
| Nominal Thread Size | 0.164 INCHES SINGLE MOUNTING FACILITY IN |
| Time Delay | 0.20 SECONDS MINIMUM AND 5.00 SECONDS MAXIMUM FIXED OPERATE AND RELEASE TIME |
| Coil Quantity | 1 |
| Environmental Protection | DUSTPROOF |
| Precious Material and Location | CONTACTS GOLD AND CONTACTS SILVER |
| Winding Quantity | 1 |
| Operating Voltage Rating and Type at Specified Temp | 24.0 VOLTS DC 25 DEG CELSIUS SINGLE WINDING |
| Center to Center Distance Between Mounting Facilities Parallel to Width | 1.750 INCHES NOMINAL SINGLE MOUNTING FACILITY IN |
| Thread Class | 2B SINGLE MOUNTING FACILITY |
| Thread Quantity Per Inch | 32 SINGLE MOUNTING FACILITY |
| Energizing Element Power Rating | 8.0 WATTS |
| Terminal Type and Quantity | 8 SCREW ALL FUNCTIONS |
| Nonpile-Up Main Contact Arrangement | 2 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 |
|---|---|
| 74120BN PRIMARY | Esna, Llc (USA) |
| Reference | Meaning |
|---|---|
| 74120BN | 5/9 Secondary reference Harvard Industries Inc |
| 2530852PC23 | 7/2 Vendor item drawing reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
NSN 5945-01-074-1965 is a Relay,electromagnetic, manufactured by Esna, Llc, classified under FSC 5945, Relays and Solenoids. Status: active.
NSN 5945-01-074-1965 has 1 manufacturer part number on file: 74120BN (Esna, Llc).
Key specifications for 74120BN: Mounting Facility Type and Quantity: 4 THREADED HOLE(S) SINGLE MOUNTING FACILITY; Overall Height: 2.830 INCHES MAXIMUM IN; Main Contact Maximum Voltage Rating in Volts: 480.0 AC AND 110.0 DC; Mounting Facility Pattern: RECTANGULAR SINGLE MOUNTING FACILITY. 21 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.