The ZY1205WRFCS-3W is a SIP (Single In-line Package) RoHS (Restriction of Hazardous Substances) compliant isolated module manufactured by Zhiyuan, which is a power module offering 1 9V output and a minimum of 18V output at 3W with an efficiency of 80%. It is also capable of withstanding 3kVDC dielectric strength. This device is typically used for switching, switching regulators, and DC/DC converter circuits. It is a common choice for applications such as lighting, communication, industrial control, and so forth. The module also features overcurrent, overtemperature, and short-circuit protection for improved safety and reliability.