40V TrenchFET Gen IV & 100V ThunderFET MOSFETs Vishay / Siliconix 40V TrenchFET Gen IV and 100V ThunderFET MOSFETs offer low ON-resistance and low total gate charge. This low ON-resistance translates into lower conduction losses and reduced power consumption for energy-saving green solutions. Available packages include TO-220, TO-252, as well as a space-saving, small-outline PowerPAK® option. Vishay / Siliconix 40V TrenchFET Gen IV and 100V ThunderFET MOSFETs are 100% Rg and UIS tested, halogen free, and RoHS compliant.