"HND400U (MCCB, 400A, 50KA Icu, Adjustable Thermal 0.63 - 1 In, Adjustable Magnetic 6 - 13 In) The HND400U is a 400A heavy-duty molded case circuit breaker built for critical power protection in industrial and high-load applications. With an interrupting capacity (Icu) of 50KA, it ensures maximum safety against overloads, short circuits, and electrical surges. The adjustable thermal trip settings from 0.63 to 1 In provide customized circuit protection, while the adjustable magnetic range of 6 to 13 In enables precise fault detection and response. This MCCB is perfect for large electrical networks requiring reliable and flexible protection."