Gen 5 600V Hyperfast & Ultrafast Rectifiers Vishay Semiconductors Gen 5 600V Hyperfast and Ultrafast Rectifiers provide a unique combination of low conduction and switching losses. The rectifiers are intended to increase the efficiency of high-frequency converters and soft-switched or resonant designs. The Gen 5 600V Hyperfast and Ultrafast Rectifiers are isolated from the copper base plate in the SOT-227 package, facilitating the building of common heatsinks and compact assemblies.