Leakage circuit breakers for the Internet of Things are suitable for 50Hz AC, 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 lines and electrical equipment against overloads, short circuits, leakage, overvoltage, and undervoltage in residential, industrial, and construction fields. They are also suitable for infrequent switching operations. They come with an open communication interface, supporting communication methods such as 485 serial port, WIFI, 2G, 4G, and NB.