Boost in switching frequency can even be realized by SiC transistors as compared to silicon transistors. That is however another reason that SiC semiconductors is usually used to create significantly smaller-sized components. For off state stress protection by deep p-locations is adopted, for on-state a thick oxide is used in https://www.quora.com/profile/Trevor-Flatcher-2/Thermal-Conductivity-of-Silicon-Carbide-and-Heat-Dissipation-Solutions-for-Electronic-Devices-Thermal-management-is-a-c