The TIP122 transistor manufactured by STMicroelectronics is a NPN-type bipolar Darlington transistor with a 100V collector-emitter voltage rating and a 5A current rating. It features a power dissipation of 65W and a TO-220AB package. Its collector-base voltage rating is 100V, its emitter-base voltage rating is 5V, its hFE DC current gain range is 1000-5000, its DC current gain is 10,000 at 1.0V, its maximum DC current gain and its frequency response is medium. This Darlington transistor is designed for linear and switching applications in general-purpose medium-power switching circuits.