The 2N6400G is a NPN silicon general-purpose transistor made by ON Semiconductor. It is used in a variety of medium-power amplifier and switching applications, such as general-purpose analog and digital transistors, signal processing circuits, interface circuits, and power switching applications. It can handle up to 25 watts of power, operates in a wide gain range, and has a low Vceo. It has a higher maximum collector-base voltage than other general-purpose transistors, and can handle higher temperature operating conditions. Its package is a plastic TO-220AB, making it ideal for through-hole assembly.