The stainless steel PZ40 modular terminal combination electrical appliance is suitable for use in single-phase three wire or three-phase five wire end circuits with an AC frequency of 50Hz, a rated working voltage of 220V or 380V, and a rated current not exceeding 100A. It is used to control and distribute electrical equipment, and to protect against overload, short circuit, leakage, and undervoltage of the circuit. It can be widely used in modern hotels, commercial, industrial and mining enterprises, and residential buildings.