The Relay,electromagnetic, cataloged under National Stock Number 5945-00-557-9577, is classified within Federal Supply Class 5945 (Relays and Solenoids) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Microsemi Corp.-Power Management Group. Government technical data includes 16 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through both NSN and commercial part number lookups. 10 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5945-00-557-9577 |
| Primary Part Number | BR8-S290 |
| Item Name | Relay,electromagnetic |
| FSC / FSG | 5945 / 59 — Relays and Solenoids |
| Manufacturer | Microsemi Corp.-Power Management Group |
| Status | ACTIVE |
| Mounting Facility Type and Quantity | 2 THREADED STUD(S) SINGLE MOUNTING FACILITY |
| Pile-Up Main Contact Form Arrangement | 1C |
| Main Contact Maximum Voltage Rating in Volts | 115.0 AC AND 28.0 DC |
| Mounting Facility Pattern | IN-LINE SINGLE MOUNTING FACILITY |
| Center to Center Distance Between Mounting Facilities Parallel to Length | 0.531 INCHES NOMINAL SINGLE MOUNTING FACILITY IN |
| Main Contact Load Current Rating at Maximum Rated Voltage | 2.0 AMPERES AC AND 2.0 AMPERES DC RESISTIVE LOAD |
| Duty Type | CONTINUOUS |
| Winding DC Resistance Rating | 552.0 OHMS NOMINAL SINGLE WINDING |
| Nominal Thread Size | 0.112 INCHES SINGLE MOUNTING FACILITY IN |
| Coil Quantity | 1 |
| Winding Quantity | 1 |
| Operating Voltage Rating and Type at Specified Temp | 26.5 VOLTS DC 25 DEG CELSIUS SINGLE WINDING |
| Thread Class | 2A SINGLE MOUNTING FACILITY A |
| Thread Quantity Per Inch | 40 SINGLE MOUNTING FACILITY |
| Terminal Type and Quantity | 5 THREADED STUD ALL FUNCTIONS |
| 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 |
|---|---|
| BR8-S290 | Microsemi Corp.-Power Management Group (USA) |
| Reference | Meaning |
|---|---|
| 3S2791G201R9V | 5/9 Secondary reference Communications Instruments Inc Div of Cii Technologies |
| P26N4D3A1 | 5/2 Secondary reference U.S. Government activity |
| 3S2791G201R9V | C/1 Advisory reference — outside the item-of-supply concept General Electric Company |
| P26B8H3A | 5/2 Secondary reference U.S. Government activity |
| BR85-552B2 | 5/1 Secondary reference Microsemi Corp.-Power Management Group |
| 3S2791G201R9CM | 5/9 Secondary reference Genicom Corp |
| 450-2140 | 3/2 Design control — primary reference U.S. Government activity |
| 210-3261 | 5/9 Secondary reference U.S. Government activity |
| 3S2791G201R9V | 5/9 Secondary reference Genicom Corp |
| 3S2791G201R9CM | 5/9 Secondary reference Communications Instruments Inc Div of Cii Technologies |
NSN 5945-00-557-9577 is a Relay,electromagnetic, manufactured by Microsemi Corp.-Power Management Group, classified under FSC 5945, Relays and Solenoids. Status: active.
NSN 5945-00-557-9577 has 1 manufacturer part number on file: BR8-S290 (Microsemi Corp.-Power Management Group).
1 possible match (shared part number, not a government interchangeability claim): 4730-01-381-8125. Verify interchangeability with system specifications before substitution.
Key specifications for BR8-S290: Mounting Facility Type and Quantity: 2 THREADED STUD(S) SINGLE MOUNTING FACILITY; Overall Height: 0.890 INCHES MAXIMUM IN; Pile-Up Main Contact Form Arrangement: 1C; Main Contact Maximum Voltage Rating in Volts: 115.0 AC AND 28.0 DC. 16 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.