Si76 Series MOSFETs Vishay Semiconductors Si76 Series MOSFETs are TrenchFET® power MOSFETs for low-side switches in DC/DC converters and OR-ings. The P- and N-channel MOSFETs are 100% avalanche and Rg tested. The Vishay Si76 Series MOSFETs offer a wide range of packages and voltages for user requirements.