Leakage circuit breakers for IoT are designed for AC 50Hz, rated working voltage up to 230V (1P+N, 2P) / 400V (3P+N, 4P), and rated working current of 80A or less. They are mainly used for controlling, isolating, and protecting low-voltage terminal distribution systems and electrical equipment against overloads, short circuits, leaks, overvoltage, and undervoltage in residential, industrial, and construction applications. They are also suitable for infrequent switching operations and come with an open communication interface, supporting 485 serial port, WIFI, 2G, 4G, and NB communication methods.