The Siemens BF 939 is a PNP silicon RF planar transistor housed in a TO 92 plastic package. It is specifically designed for controllable VHF input stages in television tuners. The document provides maximum ratings, including a collector-emitter voltage of 30 V and a maximum collector current of 20 mA.
| Package type | TO 92 plastic package |
|---|---|
| Collector-emitter voltage | 30 V |
| Collector current | 20 mA |
| Storage temperature range | -55 to +150 °C |
| Total power dissipation | 350 mW |
It is particularly suitable for controllable VHF input stages in TV tuners.
The maximum collector current is 20 mA.