This document describes HUF75333G3, HUF75333P3, and HUF75333S3S, which are 66A, 55V, 0.016 Ohm N-Channel UltraFET Power MOSFETs. These devices are manufactured using the innovative UltraFET™ process, which achieves the lowest possible on-resistance per silicon area and delivers outstanding performance. They can withstand high energy in the avalanche mode, and the diode exhibits very low reverse recovery time and stored charge. These devices are designed for applications where power efficiency is important, such as switching regulators, switching converters, motor drivers, relay drivers, low-voltage bus switches, and power management in portable and battery-operated products.