The highlighted component a transistor, Transistors are fundamental components in electronic circuits, and they're used for amplifying or switching electronic signals. The is a common type of transistor package, with a small metal can that has thre Bipolar junction transistors (BJTs): These transistors PNP, and they're used to amplify or switch small currents. Field-effect transistors (FETs): These transistors are controlled by an electric field, and they're often used in high-frequency applications.