The Rectifier,semiconductor Device,u, cataloged under National Stock Number 5961-01-279-9124, is classified within Federal Supply Class 5961 (Semiconductor Devices and Associated Hardware) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Fdh Defense Aftermarket, Llc. Government technical data includes 7 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5961-01-279-9124 |
| Primary Part Number | S-6121-2 |
| Item Name | Rectifier,semiconductor Device,u |
| FSC / FSG | 5961 / 59 — Semiconductor Devices and Associated Hardware |
| Manufacturer | Fdh Defense Aftermarket, Llc |
| Status | ACTIVE |
| Overall Diameter | 1.344 INCHES MINIMUM AND 1.468 INCHES MAXIMUM IN |
| Mounting Method | THREADED STUD(S) |
| Absolute Maximum Current Rating Per Characteristic | 6.00 AMPERES AVERAGE FORWARD CURRENT AVERAGED OVER A FULL 60-HZ CYCLE |
| Absolute Maximum Voltage Rating in Volts Per Characteristic | 300.0 PEAK INVERSE VOLTAGE AND 210.0 OFF-STATE VOLTAGE, RMS TOTAL |
| Material | SILICON |
| Terminal Type and Quantity | 4 TAB, SOLDER LUG |
| Circuit Connection Style Designator | BRIDGE 1 PHASE |
| 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 |
|---|---|
| S-6121-2 PRIMARY | Fdh Defense Aftermarket, Llc (USA) |
| B1915 PRIMARY | Electron Coil, Inc. (USA) |
| Reference | Meaning |
|---|---|
| S-6121-2 | 3/9 Design control — primary reference Gateway Semiconductors Corp |
| S-6121-2 | 5/9 Secondary reference St-Semicon Inc |
| S-6121-2 | 5/9 Secondary reference Electron Coil, Inc. |
NSN 5961-01-279-9124 is a Rectifier,semiconductor Device,u, manufactured by Fdh Defense Aftermarket, Llc, classified under FSC 5961, Semiconductor Devices and Associated Hardware. Status: active.
NSN 5961-01-279-9124 has 2 manufacturer part numbers on file: S-6121-2 (Fdh Defense Aftermarket, Llc), B1915 (Electron Coil, Inc.).
Key specifications for S-6121-2: Overall Diameter: 1.344 INCHES MINIMUM AND 1.468 INCHES MAXIMUM IN; Mounting Method: THREADED STUD(S); Overall Length: 1.344 INCHES MINIMUM AND 1.468 INCHES MAXIMUM IN; Absolute Maximum Current Rating Per Characteristic: 6.00 AMPERES AVERAGE FORWARD CURRENT AVERAGED OVER A FULL 60-HZ CYCLE. 7 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.