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 primarily used for 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. They can also be used for infrequent switching operations and come with an open communication interface, enabling communication via 485 serial port, WIFI, 2G, 4G, NB, and other methods.