This NS series 4P 630N molded case circuit breaker is a professional low-voltage power distribution protection device with a rated current of 630A and 4‑pole structure, widely used in industrial, construction and power distribution systems. It features a mature and stable design, strong versatility, high breaking capacity, and compact structure for easy installation and maintenance. Its core function is to quickly disconnect the circuit in case of overload or short circuit, effectively protecting lines, equipment and personal safety, and ensuring stable and safe operation of the entire power distribution system.