The SI2303 is a SOT-23-3 MOSFET manufactured by Youtai that is compliant with the European Union's Restriction of Hazardous Substances (RoHS) regulation. It’s an N-channel enhancement mode device with a fast switching speed, low operating current, and low on-resistance. The pinout is Gate, Drain, Source, with the package size of 3.9mm x 2.9mm and total power dissipation of 0.3W. It can handle voltages up to 60V and dissipate up to 350A in continuous current, which makes it suitable for a wide range of applications including power management, switching frequency and motor control. Overall, the SI2303 is a highly efficient device for industrial and commercial applications.