The RU3415B is a SOT-23 MOSFET manufactured by Ruichips. It is RoHS compliant, meaning that it meets the Restriction of Hazardous Substances (RoHS) directive for the European Union. This MOSFET is used in a wide range of consumer applications, such as computer motherboards, televisions, and other electronic devices. The RU3415B is a dual-gate enhancement-mode MOSFET, which means that it can be used to control the flow of current by creating an inversion layer. It has a very low drain-source On resistance of just 0.0003 Ohm, and an operating voltage range of -20 to +25V. This device is excellent for applications that require both low power and high speed switching. It is also ideal for controlling the speed of motors, LEDs, or any other device that requires precise speed control.