BUY BT33F https://www.utsource.net/itm/p/1086200.html

The BT33F is a NPN silicon epitaxial planar transistor manufactured by STMicroelectronics. It is designed for use in general purpose amplifier and switching applications. Features: Low Collector-Emitter Saturation Voltage High DC Current Gain High Switching Speed High Reliability Low Noise Low Power Consumption Low Thermal Resistance RoHS Compliant Applications: Audio Amplifiers Motor Control Switching Applications Power Management General Purpose Amplifiers (For reference only)