The YS-U20S15 190513 is a power module that has been designed and manufactured by ESHION. It is a RoHS compliant part, meaning it does not contain hazardous materials like lead, mercury, or cadmium. It is a single-phase switch mode power supply module with adjustable output voltage and current, suitable for 20W output applications. It features inrush current limiting, over-current protection, short circuit protection, and temperature protection. It also has a power factor correction of 0.80 or greater, as well as a low no load consumption. It has a wide input voltage range of 90-264VAC, and its output voltage is adjustable up to 15V. It is an efficient and reliable part for a range of applications.