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标题: Understanding the Function and Applications of 220V AC Relay A 220V AC relay is an essential electrical component widely used in modern electrical and electronic systems to control high-voltage circuits safely and efficiently. Relays serve as electrically operated switches that can open or close circuits without requiring direct human interaction, enabling automation, protection, and control of various devices. Among the many types of relays available, the 220V AC relay is particularly notable for its ability to directly handle standard household and industrial AC voltages, making it highly versatile in both domestic and industrial applications.