The Relay,electromagnetic, cataloged under National Stock Number 5945-00-255-6432, is classified within Federal Supply Class 5945 (Relays and Solenoids) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Te Connectivity Corporation. Government technical data includes 12 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5945-00-255-6432 |
| Primary Part Number | A54577 |
| Item Name | Relay,electromagnetic |
| FSC / FSG | 5945 / 59 — Relays and Solenoids |
| Manufacturer | Te Connectivity Corporation |
| Status | ACTIVE |
| Mounting Facility Type and Quantity | 2 THREADED HOLE(S) SINGLE MOUNTING FACILITY |
| Pile-Up Main Contact Form Arrangement | 2B3A |
| Mounting Facility Pattern | IN-LINE SINGLE MOUNTING FACILITY |
| Center to Center Distance Between Mounting Facilities Parallel to Length | 0.750 INCHES NOMINAL SINGLE MOUNTING FACILITY IN |
| Duty Type | CONTINUOUS |
| Winding DC Resistance Rating | 100.0 OHMS NOMINAL SINGLE WINDING |
| Nominal Thread Size | 0.164 INCHES SINGLE MOUNTING FACILITY IN |
| Coil Quantity | 1 |
| Winding Quantity | 1 |
| Operating Voltage Rating and Type at Specified Temp | 4.5 VOLTS DC 25 DEG CELSIUS SINGLE WINDING |
| Thread Class | 2B SINGLE MOUNTING FACILITY |
| 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 |
|---|---|
| A11731-3A2BC0NTACTS | Te Connectivity Corporation (USA) |
| A54577 PRIMARY | Te Connectivity Corporation (USA) |
| Reference | Meaning |
|---|---|
| A54577 | 5/9 Secondary reference Te Connectivity Corporation |
| A11731-3A2BC0NTACTS | 5/9 Secondary reference Te Connectivity Corporation |
| 21B033 | 5/1 Secondary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple |
| A54577 | 5/9 Secondary reference Cp Clare Corp North American Sales Operations |
| A11731-3A2BC0NTACTS | 5/9 Secondary reference Cp Clare Corp North American Sales Operations |
NSN 5945-00-255-6432 is a Relay,electromagnetic, manufactured by Te Connectivity Corporation, classified under FSC 5945, Relays and Solenoids. Status: active.
NSN 5945-00-255-6432 has 2 manufacturer part numbers on file: A11731-3A2BC0NTACTS (Te Connectivity Corporation), A54577 (Te Connectivity Corporation).
1 possible match (shared part number, not a government interchangeability claim): 5945-00-255-6786. Verify interchangeability with system specifications before substitution.
Key specifications for A54577: Mounting Facility Type and Quantity: 2 THREADED HOLE(S) SINGLE MOUNTING FACILITY; Overall Height: 2.000 INCHES NOMINAL IN; Pile-Up Main Contact Form Arrangement: 2B3A; Mounting Facility Pattern: IN-LINE SINGLE MOUNTING FACILITY. 12 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.