Generation 2 TMBS Trench MOS Barrier Schottkys Vishay General Semiconductor Generation 2 TMBS Trench MOS Barrier Schottkys are the second generation of trench MOS Schottky rectifiers from Vishay. They have low forward voltage drop and low power losses with high-efficiency operation. Vishay Gen 2 TMBS devices are ideal for use in high-frequency DC/DC converters, switching power supplies, freewheeling diodes, OR-ing diodes, and reverse battery protection.