The HY1804P is a MOSFET (Metal Oxide Semiconductor Field Effect Transistor) manufactured by HuaYi. It is designed as a 40V, 110A device, with a Tc of 3V @ 250uA, 4.5mOhm @ 55A, and 10V reverse threshold. The package is TO-220FB-3L RoHS (Restriction on Hazardous Substances Directive compliant). This device is intended for use in applications such as switching, amplifying, and Voltage Regulation.