80 V, N-Ch, 1.4 mΩ max, Automotive MOSFET, TOLT (10x15), OptiMOS™-5 The IAUS300N08S5N014T is a 1.4 mΩ, topside-cooled 80 V MOSFET coming in the TOLT package with Infineon’s leading OptiMOS™-5 technology. Next to others the device is designed for 48V applications. Alongside the 48V auxiliary applications, the device is primarily used in the the DC-DC converter and the main battery switch.