The L7809CV is a Linear Voltage Regulator with a TO-220 RoHS package, manufactured by Youtai. It has an input voltage of 9V - 18V, an output voltage of 9V, and a maximum output current of 1.5A. It is a three-pin package that includes an input, output, and ground pin. It has a Thermal Overload Protection and a Short-circuit Protection. It is a low-dropout three-terminal regulator that can achieve a dropout of 1.5V at 1.5A. It has a high current capability and low noise and operates over an operating temperature range of -40 to +125 Celsius.