The KST9013 is a SOT23 RoHS compliant NPN transistor manufactured by Kexin. It is a low-cost, extremely small-sized, and high-efficient NPN semiconductor device designed to amplify or switch electrical signals. It features a very low saturation voltage (Vce) of 0.4V, low noise, and high-speed switching capability. It has a maximum collector current of 70mA and collector-base breakdown voltage of 16V. It can be used in the circuit designs for low frequency digital and analog applications, like line drivers, logic gates, and pre-amplifiers. It is also very suitable for low voltage, battery-powered applications.