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 the control and isolation of low-voltage terminal power distribution in residential, industrial, and construction fields, and provide protection against overloads, short circuits, leakage, overvoltage, and undervoltage for low-voltage terminal power distribution lines and electrical equipment. They can also be used for infrequent switching operations and are equipped with an open communication interface, enabling communication via 485 serial port, WIFI, 2G, 4G, and NB.