RGS Field Stop Trench Automotive IGBTs ROHM Semiconductor RGS Field Stop Trench Automotive IGBTs are AEC-Q101-rated automotive IGBTs that are available in 1200V and 650V variants. These IGBTs deliver class-leading low conduction loss that reduces the size and improves the efficiency of applications. The RGS IGBTs utilize original trench-gate and thin-wafer technologies. These technologies help to achieve low collector-emitter saturation voltage (VCE(sat)) with reduced switching losses. These IGBTs provide increased energy savings in a variety of high voltage and high current applications.