TIP126 Darlington Transistor

The TIP126 is a complementary PNP Darlington power transistor designed for high-gain amplification and switching applications. It features a monolithic Darlington configuration, offering very high current gain (hFE) and low collector-emitter saturation voltage, which minimizes power loss. This transistor is commonly used in applications requiring substantial current handling, such as motor speed controllers, relay drivers, solenoid actuators, and power supply regulators. Its TO-220 package allows for easy mounting on heat sinks for thermal management. While the original Fairchild Semiconductor version is discontinued, reliable alternatives from manufacturers like STMicroelectronics and Multicomp are widely available. Choosing the TIP126 ensures robust performance for your power switching needs, with proven reliability in both hobbyist and industrial circuits.