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