BUY 2N4030 https://www.utsource.net/itm/p/915059.html
Small Signal Transistors
2N4030 is a NPN silicon planar epitaxial transistor manufactured by Motorola. It is designed for general purpose switching and amplifier applications. Description: The 2N4030 is a NPN silicon planar epitaxial transistor with a collector-emitter voltage of 40V and a collector current of 0.5A. Features: Low collector-emitter saturation voltage High current gain Low noise Applications: General purpose switching Amplifier applications Low frequency oscillators Audio amplifiers (For reference only)