2SA1940 is a PNP triple diffusion power transistor produced by Toshiba. Its maximum voltage is -120V, maximum current is -8A, and maximum power loss is 80W.
The 2SA1940 is a silicon PNP power transistor designed for power‑amplification use, such as 55 W hi‑fi audio‑amp output stages. It is supplied in a TO‑220 package and is intended for general electronic equipment.
The document lists the transistor's electrical parameters, including voltage and current limits, transition frequency, output capacitance, and hFE ranges, and also contains safe‑operating‑area graphs and handling warnings for critical applications. This manual is written in Japanese.
| Collector Current (Ic) | -9 A |
|---|---|
| Power Dissipation (Pc) | 80 W |
| hFE (DC current gain) range | R: 55‑110, O: 80‑160 |
It is optimal for a 55 W hi‑fi audio amplifier output stage.