The Relay,electromagnetic, cataloged under National Stock Number 5945-01-126-8209, is classified within Federal Supply Class 5945 (Relays and Solenoids) of the Electrical and Electronic Equipment Components group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 16 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5945-01-126-8209 |
| Primary Part Number | ST5M1551-001 |
| Item Name | Relay,electromagnetic |
| FSC / FSG | 5945 / 59 — Relays and Solenoids |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Mounting Facility Type and Quantity | 2 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY |
| 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 | 1.620 INCHES NOMINAL SINGLE MOUNTING FACILITY IN |
| Main Contact Load Current Rating at Maximum Rated Voltage | 300.0 MILLIAMPERES AC AND 2.0 AMPERES DC RESISTIVE LOAD |
| Duty Type | CONTINUOUS |
| Unthreaded Mounting Hole Diameter | 0.196 INCHES NOMINAL SINGLE MOUNTING FACILITY IN |
| Frequency in Hertz | 400.0 NOMINAL |
| Nominal Operating Current Rating and Type | 4.0 AMPERES DC ALL WINDINGS |
| Time Delay | 0.01 SECONDS MAXIMUM FIXED OPERATE AND RELEASE TIME |
| Coil Quantity | 2 |
| Environmental Protection | HERMETIC |
| Winding Quantity | 2 |
| Operating Voltage Rating and Type at Specified Temp | 115.0 VOLTS AC 25 DEG CELSIUS ALL WINDINGS |
| Terminal Type and Quantity | 1 CONNECTOR, RECEPTACLE ALL FUNCTIONS |
| Nonpile-Up Main Contact Arrangement | 1 POLE, DOUBLE THROW, ONE POSITION MOMENTARY |
| 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 |
|---|---|
| AE144-007-99 | Dare Electronics, Inc. (USA) |
| ST5M1551-001 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| 10132646 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| 6215-1 | 5/2 Secondary reference U.S. Government activity |
NSN 5945-01-126-8209 is a Relay,electromagnetic, manufactured by The Boeing Company Div Defense, classified under FSC 5945, Relays and Solenoids. Status: active.
NSN 5945-01-126-8209 has 2 manufacturer part numbers on file: AE144-007-99 (Dare Electronics, Inc.), ST5M1551-001 (The Boeing Company Div Defense).
2 possible matches (shared part number, not a government interchangeability claim): 3040-01-503-5860, 5980-01-523-3495. Verify interchangeability with system specifications before substitution.
Key specifications for ST5M1551-001: Mounting Facility Type and Quantity: 2 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY; Overall Height: 3.230 INCHES NOMINAL IN; Main Contact Maximum Voltage Rating in Volts: 115.0 AC AND 28.0 DC; Mounting Facility Pattern: IN-LINE SINGLE MOUNTING FACILITY. 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.