The Typhoon HIL404 is a 4th-generation Hardware-in-the-Loop (HIL) testing platform offering ultra-high fidelity and exceptional speed for real-time simulations. Designed for demanding applications in power electronics and automotive systems, it supports 200 ns simulation time steps and 3.5 ns digital input sampling resolution, making it the fastest HIL device available. The HIL404 features advanced nonlinear machine modeling, real-time semiconductor power loss emulation, and seamless integration with simulation tools like MATLAB/Simulink and JMAG. With extensive connectivity options, it supports rapid control prototyping, automated testing, and real-time emulation of complex systems such as microgrids, motor drives, and battery inverters.