The TIP107 is an NPN Darlington transistor manufactured by STMicroelectronics. It is commonly used as a switching device in different applications such as power supplies, motor control, and audio amplification. It features high current gain, low saturation voltage, and low voltage drop. In addition, it also features high frequency performance, low-noise operation, and easy assembly. Furthermore, this device is available in TO220 and SOT-223 packages, making it suitable for a wide range of applications.