CoolSiC™ MOSFETs 650V Infineon Technologies CoolSiC™ MOSFETs 650V combines the physical strength of silicon carbide with features amplifying device performance, reliability, and ease of use. With its state-of-the-art trench semiconductor process, the CoolSiC™ MOSFET delivers the lowest losses in the application and the highest reliability in operation. CoolSiC is the perfect fit for use in high-temperature and harsh environment applications.