Power transistors are specialized transistors designed to handle high voltages, high currents, and significant power levels. Unlike standard small-signal transistors, power transistors are built with larger junction areas and are often housed in packages with heat sinks or metal tabs to dissipate heat efficiently.
They are widely used in power amplification, switching, and motor control applications, and come in various types such as BJTs, MOSFETs, IGBTs, and Darlington pairs, each optimized for specific power requirements.