BUY B817 /1047 https://www.utsource.net/itm/p/8853211.html

The B817/1047 is a NPN silicon transistor manufactured by KEC. It has a maximum collector-emitter voltage of 80 V and a maximum collector current of 1 A. It is designed for use in general purpose amplifier and switching applications. It is also suitable for use as a low-noise amplifier, high-speed switching, and low-frequency oscillator. (For reference only)