The HH18N120F500LT is a High Energy CoolMOS Power Transistor produced by Walsin. It is a N-channel MOSFET transistor, with a drain to source 600V voltage, gate threshold voltage of < 9V, gate charge of 470nC, a drain current of 400A, and a maximum drain-source on-state resistance of 0.28mO. It is designed for use in various power switching applications, including Rectifiers and Inverters.