BUY KST4403 https://www.utsource.net/itm/p/11273685.html
KST4403 PNP transistors(BJT) -40V -600mA/- 0.6A 200MHz 100~300 -750mV/-0.75V SOT-23/SC-59 marking 2T switch
Description: NPN Transistor Features: Low Collector-Emitter Saturation Voltage High DC Current Gain Low Noise High Switching Speed Low Collector-Emitter Leakage Current High Reliability RoHS Compliant Applications: Audio Amplifiers Switching Circuits High-Speed Logic Circuits High-Voltage Switching Applications (For reference only)