eSMP® SMPA Schottky Rectifiers Vishay General Semiconductors eSMP® SMPA Schottky Rectifiers are a patented Trench MOS Barrier Schottky (TMBS®) rectifiers that are available with seven voltage ratings from 45V to 200V and several different package options to serve a wide range of system requirements. TMBS offers several advantages over planar Schottky rectifiers. As operating voltage moves to 45V and above, planar Schottky rectifiers tend to lose their advantage of fast switching speeds and low forward voltage drop to a substantial degree. The Vishay General Semiconductors patented TMBS structure addresses this issue by diminishing minority carrier injections to the drift region, thus minimizing stored charges and improving switching speeds.