The S1G M2G with Diodes – General Purpose 400V 1A 1.1V @ 1A SMA RoHS is a metal-oxide semiconductor diode manufactured by Taiwan Semiconductor. This diode has a blocking voltage of 400V, a forward current rating of 1A, and has a forward voltage of 1.1V at 1A. The SMA (Standard Miniature Anode) package is RoHS (Restriction of Hazardous Substances) compliant, meaning the diode does not contain any hazardous materials or elements in its construction. This diode is ideal for a variety of applications, including signal switching, rectification, power supply, and surge protection.