Combining a low RDS(on) with a wide safe operating area (SOA) OptiMOS™ Linear FET is a revolutionary approach to avoid the trade-off between on-state resistance (R DS(on)) and linear mode capability – operation in the saturation region of an enhanced mode MOSFET. It offers the state-of-the-art R DS(on) of a trench MOSFET together with the wide safe operating area of a classic planar MOSFET.