OptiMOS™ 5 power MOSFET 150 V in TOLT for excellent thermal performance IPTC044N15NM5 is part of the OptiMOS™ 5 power MOSFET in TOLT family: the TO-Leaded top-side cooling package for superior thermal performance. This innovative package combined with the key features of OptiMOS™ 5 technology allows best-in-class products in 150 V as well as high current rating for high-power density designs.