The Transistor, cataloged under National Stock Number 5961-01-426-8909, 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 Powerex, Inc.. Government technical data includes 6 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5961-01-426-8909 |
| Primary Part Number | KS221K05 |
| Item Name | Transistor |
| FSC / FSG | 5961 / 59 — Semiconductor Devices and Associated Hardware |
| Manufacturer | Powerex, Inc. |
| Status | ACTIVE |
| Voltage Rating in Volts Per Characteristic | 1000.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR TO EMITTER, SUSTAINED AND 2500.0 MAXIMUM NONREPETITIVE PEAK REVERSE VOLTAGE |
| Mounting Facility Quantity | 2 |
| Mounting Method | UNTHREADED HOLE(S) |
| Semiconductor Material | SILICON |
| Material | PLASTIC ENCLOSURE |
| Terminal Type and Quantity | 3 SCREW |
| 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 |
|---|---|
| KS221K05 PRIMARY | Powerex, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 8823545 | 5/9 Secondary reference U.S. Government activity |
NSN 5961-01-426-8909 is a Transistor, manufactured by Powerex, Inc., classified under FSC 5961, Semiconductor Devices and Associated Hardware. Status: active.
NSN 5961-01-426-8909 has 1 manufacturer part number on file: KS221K05 (Powerex, Inc.).
Key specifications for KS221K05: Voltage Rating in Volts Per Characteristic: 1000.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR TO EMITTER, SUSTAINED AND 2500.0 MAXIMUM NONREPETITIVE PEAK REVERSE VOLTAGE; Mounting Facility Quantity: 2; Mounting Method: UNTHREADED HOLE(S); Semiconductor Material: SILICON. 6 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.