QST9 is a general-purpose amplifier suitable for low-frequency amplification and driver applications. It features a large collector current and low collector saturation voltage.
The QST9 is a general‑purpose amplification transistor designed for low‑frequency amplifier and driver applications. It offers a large collector current capability and low collector saturation voltage.
The datasheet lists absolute maximum ratings, electrical parameters such as collector‑base voltage of –30 V, collector current up to 1 A, power dissipation of 1.25 W, junction temperature of 150 °C, and a transition frequency of 320 MHz. Packaging information and characteristic curves are also included.
| Collector‑base voltage | -30 V |
|---|---|
| Collector‑emitter voltage | -30 V |
| Collector current (Ic) | 1 A |
| Power dissipation (Pc) | 1.25 W |
| Junction temperature (Tj) | 150 °C |
| Transition frequency (fT) | 320 MHz |
| DC current gain (hFE) | 270‑680 |
The QST9 can handle a collector current of up to 1 A.
The transition frequency of the QST9 is 320 MHz.