BUY MMBT4124 https://www.utsource.net/itm/p/11278403.html
MMBT4124 NPN Transistors(BJT) 30V 200mA/0.2A 300Mhz 120~360 300mV/0.3V SOT-23/SC-59 marking ZC general amplifier and switch
Description: PNP Bipolar Transistor Features: Low Collector-Emitter Saturation Voltage High Current Gain Bandwidth Product Low Noise Low Input Capacitance High Gain Bandwidth Product Low Leakage Current Low Collector-Emitter Saturation Voltage Low Input Capacitance High Gain Bandwidth Product Low Leakage Current Low Collector-Emitter Saturation Voltage Low Input Capacitance High Gain Bandwidth Product Low Leakage Current Low Collector-Emitter Saturation Voltage Low Input Capacitance High Gain Bandwidth Product Low Leakage Current Low Collector-Emitter Saturation Voltage Low Input Capacitance High Gain Bandwidth Product Low Leakage Current Low Collector-Emitter Saturation Voltage Low Input Capacitance High Gain Bandwidth Product Low Leakage Current Application: Audio Amplifiers Switching Circuits High Speed Logic Circuits High Frequency Oscillators High Voltage DC-DC Converters Low Noise Amplifiers High Frequency Amplifiers Motor Control Circuits Power Management Circuits (For reference only)