The Relay,electromagnetic, cataloged under National Stock Number 5945-01-664-0803, is classified within Federal Supply Class 5945 (Relays and Solenoids) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Siemens Energy & Automation Inc. Div Siemens Energy & Automation Inc. The record lists 8 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5945-01-664-0803 |
| Primary Part Number | 3UG4513-1BR20 |
| Item Name | Relay,electromagnetic |
| FSC / FSG | 5945 / 59 — Relays and Solenoids |
| Manufacturer | Siemens Energy & Automation Inc. Div Siemens Energy & Automation Inc |
| Status | ACTIVE |
| 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 |
|---|---|
| EC4090 | Mcgeoch Technology Ltd (GBR) |
| 3UG4513-1BR20 | Fincantieri S.p.a. Div Direzione Navi Militari (ITA) |
| B-RU-SIE-UG4-690-040 | Hanseatic Power Solutions Gmbh (DEU) |
| 40078234 | Ministry of Defence, Future Aircraft Carrier Ipt (cvf Ipt) (GBR) |
| 3UG4513-1BR20 PRIMARY | Siemens Energy & Automation Inc. Div Siemens Energy & Automation Inc (USA) |
| 70107920 | Bae Systems Marine Limited (GBR) |
| 3UG4513-1BR20 | Siemens Spa Div Building Technologies - Building Automation (ITA) |
| B1142 | Hanseatic Power Solutions Gmbh (DEU) |
NSN 5945-01-664-0803 is a Relay,electromagnetic, manufactured by Siemens Energy & Automation Inc. Div Siemens Energy & Automation Inc, classified under FSC 5945, Relays and Solenoids. Status: active.
NSN 5945-01-664-0803 has 8 manufacturer part numbers on file: EC4090 (Mcgeoch Technology Ltd), 3UG4513-1BR20 (Fincantieri S.p.a. Div Direzione Navi Militari), B-RU-SIE-UG4-690-040 (Hanseatic Power Solutions Gmbh), 40078234 (Ministry of Defence, Future Aircraft Carrier Ipt (cvf Ipt)), 3UG4513-1BR20 (Siemens Energy & Automation Inc. Div Siemens Energy & Automation Inc) and 3 more.
1 possible match (shared part number, not a government interchangeability claim): 3040-01-719-2197. Verify interchangeability with system specifications before substitution.
Key specifications for 3UG4513-1BR20: Overall Height: 92.0 MILLIMETERS NOMINAL MM; Overall Length: 91.0 MILLIMETERS NOMINAL MM; Overall Width: 22.5 MILLIMETERS NOMINAL MM; Part Name Assigned by Controlling Agency: PHASE MONITORING RELAY. 0 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.