BUY BC847 https://www.utsource.net/itm/p/11273085.html
BC847 NPN Transistors(BJT) 50V 100mA/0.1A 300MHz 110~800 200~600 mV SOT-23/SC-59 marking 1F generalswitch and amplifier
Description: NPN Bipolar Transistor Features: Low collector-emitter saturation voltage High current gain Low noise High switching speed High current gain Low collector-emitter saturation voltage High frequency performance Low noise High switching speed Applications: General purpose switching and amplification High speed switching Low noise amplifier High frequency oscillator Interface circuit Driver circuit Motor control (For reference only)