The TIP120 is a popular NPN darlington transistor commonly used in power switching applications. It features a high DC current gain and can handle a maximum collector-emitter voltage of 60V. The TIP120 is housed in a TO-220 package, making it suitable for use in a wide range of electronic circuits. With a base-emitter voltage of 2V, the TIP120 is ideal for controlling high power devices such as relays, motors, solenoids, and other inductive loads. Its darlington configuration allows for high input impedance and high current gain, making it well-suited for applications where a microcontroller or other low-power signal source is used to control larger loads. The TIP120 is widely used in DIY electronics projects, as well as in commercial products where reliable and efficient power switching is required. Its ease of use and high current-handling capabilities make it a popular choice for hobbyists and professionals alike.