High-Performance Schottky Diodes, Vishay Semiconductor Schottky Rectifiers are semiconductor diodes that exhibit very low forward voltage drop with a very fast switching action. The reverse recovery times of Schottky diodes are extremely quick. Schottky diodes are suitable for applications requiring fast switching and low power loss. High-performance Schottky diodes from Vishay are offered with forward current ratings of 1A to 175A and voltage ratings of 15V to 150V.