The 2N2220 is a general-purpose, NPN, silicon-based transistor produced by Vishay. It is a medium power, low-voltage device which can handle up to 800 mA of current. It has a voltage gain of 200 and a maximum collector-base voltage of 60 volts. The device is designed for switching, amplifying, and protecting circuits, and has a maximum operating temperature of 150°C. This versatile device is commonly used in logic circuits, interface and audio circuits, and small power switching circuits.