Automotive U-MOSIX-H Power MOSFETs Toshiba Automotive U-MOSIX-H Power MOSFETs are 40V N-channel power MOSFETs ideal for automotive applications. These devices are housed in a small, low-resistance SOP Advance (WF) package. They feature low on-resistance, which can reduce conduction loss. The U-MOSIX-H series also lowers switching noise compared with Toshiba Electronic Devices and Storage Corporation’s previous series (U-MOSIV).