BUY MMBT5550 https://www.utsource.net/itm/p/11274813.html
MMBT5550 NPN 160V 0.6A HEF=60~250 SOT23 MARKING 1F
Description: NPN Bipolar Transistor
Features:
Low Collector-Emitter Saturation Voltage
Low Noise
High Gain Bandwidth Product
High Current Gain
High Switching Speed
High Reliability
Low Collector-Base Capacitance
High DC Current Gain
Low Collector-Emitter Leakage Current
High DC Current Gain
Low Collector-Base Leakage Current
High DC Current Gain
Low Input Capacitance
High DC Current Gain
Low Input Impedance
Applications:
Audio Amplifiers
Switching Applications
High Speed Switching
High Frequency Amplifiers
High Voltage Switching
High Frequency Switching
Low Noise Amplifiers
High Voltage Amplifiers
High Speed Amplifiers
Low Frequency Amplifiers
(For reference only)