The S9015 is a PNP transistor in a SOT-23-3 package manufactured by Youtai. It is a RoHS-compliant, low-power, low-noise, high-gain, three-pin semiconductor device, suitable for general switching and amplification applications. This transistor has a maximum power dissipation of 500mW and a maximum collector-emitter voltage (Vceo) of 40V. It has a maximum collector current (Ic) of 800mA and a hFE rating of 400 minimum at Ic = 50mA. Other features include a maximum collector-base voltage (Vcbo) of 80V and a maximum emitter-base voltage of 6V. The S9015 is a popular choice for hobbyists and electrical engineers alike, due to its low cost and widespread availability.