The S8550-L Transistor is a bipolar PNP Transistor manufactured by Yangjie. It has a voltage of 25V, a current of 0.5A, a power dissipation of 300mW, and is in a SOT23 package. It is designed for use in audio amplifiers, linear and switching voltage regulators, motor control circuits, and other low-power amplification, switching, or logic applications.