The Relay,reed, cataloged under National Stock Number 5945-01-014-4988, is classified within Federal Supply Class 5945 (Relays and Solenoids) of the Electrical and Electronic Equipment Components group. The manufacturer of record is American Relays Inc. Government technical data includes 10 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5945-01-014-4988 |
| Primary Part Number | A121A1U0A |
| Item Name | Relay,reed |
| FSC / FSG | 5945 / 59 — Relays and Solenoids |
| Manufacturer | American Relays Inc |
| Status | ACTIVE |
| Mounting Facility Type and Quantity | 1 PLUG-IN TERMINAL(S) SINGLE MOUNTING FACILITY |
| Main Contact Maximum Voltage Rating in Volts | 250.0 DC |
| Main Contact Load Current Rating at Maximum Rated Voltage | 500.0 MILLIAMPERES DC RESISTIVE LOAD |
| Duty Type | CONTINUOUS |
| Winding DC Resistance Rating | 750.0 OHMS NOMINAL SINGLE WINDING |
| Coil Quantity | 11 |
| Winding Quantity | 11 |
| Operating Voltage Rating and Type at Specified Temp | 7.5 VOLTS DC 25 DEG CELSIUS SINGLE WINDING |
| Terminal Type and Quantity | 4 PIN ALL FUNCTIONS |
| Nonpile-Up Main Contact Arrangement | 1 POLE, SINGLE THROW, NORMALLY OPEN, MOMENTARY ACTION |
| 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 |
|---|---|
| A121A1U0A | American Relays Inc (USA) |
| Reference | Meaning |
|---|---|
| 379880 | 5/9 Secondary reference U.S. Government activity |
| 376246 | 5/9 Secondary reference U.S. Government activity |
| 172039P1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5945-01-014-4988 is a Relay,reed, manufactured by American Relays Inc, classified under FSC 5945, Relays and Solenoids. Status: active.
NSN 5945-01-014-4988 has 1 manufacturer part number on file: A121A1U0A (American Relays Inc).
1 possible match (shared part number, not a government interchangeability claim): 5930-01-242-4412. Verify interchangeability with system specifications before substitution.
Key specifications for A121A1U0A: Mounting Facility Type and Quantity: 1 PLUG-IN TERMINAL(S) SINGLE MOUNTING FACILITY; Overall Height: 0.500 INCHES MAXIMUM0.500 INCHES MAXIMUM IN; Main Contact Maximum Voltage Rating in Volts: 250.0 DC; Main Contact Load Current Rating at Maximum Rated Voltage: 500.0 MILLIAMPERES DC RESISTIVE LOAD. 10 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.