IR HiRel R9 superjunction technology provides a rad hard, 60V, 40A N-channel MOSFET in a SMD-0.5 package with electrical performance up to 300krad(Si) TID, QPL classification. The JANSF2N7647U3 MOSFETs have excellent immunity to SEE and LET up to 90MeV·cm2/mg. With low RDS(on) and fast switching times, they improve power density in high-speed switching applications like DC-DC converters and motor controllers.