Leakage circuit breakers for IoT are suitable 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 control, isolation, and protection of low-voltage terminal distribution systems and electrical equipment against overloads, short circuits, leaks, overvoltage, and undervoltage in residential, industrial, and construction fields. They can also be used for infrequent switching operations and come with an open communication interface, supporting communication methods such as 485 serial port, WIFI, 2G, 4G, and NB.