Leakage circuit breakers for IoT are designed 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 primarily used for controlling, isolating, and protecting low-voltage terminal power distribution in residential, industrial, and construction fields against overloads, short circuits, leaks, overvoltage, and undervoltage. They are also suitable for infrequent switching operations and come with an open communication interface, enabling communication via 485 serial port, WIFI, 2G, 4G, and NB.