The Transistor, cataloged under National Stock Number 5961-01-075-9587, 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 Toshiba Corporation. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5961-01-075-9587 |
| Primary Part Number | 2SC521A |
| Item Name | Transistor |
| FSC / FSG | 5961 / 59 — Semiconductor Devices and Associated Hardware |
| Manufacturer | Toshiba Corporation |
| Status | ACTIVE |
| Voltage Rating in Volts Per Characteristic | 70.0 MAXIMUM COLLECTOR TO BASE VOLTAGE/STATIC/EMITTER OPEN |
| Maximum Operating Temp Per Measurement Point | 150.0 CELSIUS AMBIENT AIR DEGC |
| Mounting Facility Quantity | 2 |
| Overall Diameter | 25.000 MILLIMETERS MAXIMUM MM |
| Mounting Method | UNTHREADED HOLE(S) |
| Semiconductor Material | SILICON |
| Features Provided | HERMETICALLY SEALED CASE |
| Current Rating Per Characteristic | 7.00 AMPERES MAXIMUM COLLECTOR CURRENT, DC |
| Terminal Type and Quantity | 2 UNINSULATED WIRE LEAD |
| Power Rating Per Characteristic | 25.0 WATTS MAXIMUM COLLECTOR POWER DISSIPATION |
| 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 |
|---|---|
| 2SC521A | Toshiba Corporation (JPN) |
| Reference | Meaning |
|---|---|
| 4073052154 | 3/9 Design control — primary reference Teac Corporation |
| 2SC521A | 5/9 Secondary reference Toshiba Corporation |
| 2SC521A | 5/9 Secondary reference Tokyo Shibaura Electric Co. Ltd |
NSN 5961-01-075-9587 is a Transistor, manufactured by Toshiba Corporation, classified under FSC 5961, Semiconductor Devices and Associated Hardware. Status: active.
NSN 5961-01-075-9587 has 1 manufacturer part number on file: 2SC521A (Toshiba Corporation).
Key specifications for 2SC521A: Voltage Rating in Volts Per Characteristic: 70.0 MAXIMUM COLLECTOR TO BASE VOLTAGE/STATIC/EMITTER OPEN; Maximum Operating Temp Per Measurement Point: 150.0 CELSIUS AMBIENT AIR DEGC; Mounting Facility Quantity: 2; Overall Diameter: 25.000 MILLIMETERS MAXIMUM MM. 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.