A 220VAC Power Relay is an essential electrical component used to control high voltage or high current circuits with a low voltage control signal. These relays are found in various applications, ranging from home appliances to industrial automation systems. Understanding the basic principles, features, applications, and selection criteria for a 220VAC Power Relay can help in making the right choice for any project.

What is a 220VAC Power Relay? A 220VAC Power Relay is an electromechanical device designed to switch a 220V AC (alternating current) load using a low voltage control signal. It operates by utilizing the electromagnetic principle, where an electric current passes through a coil, creating a magnetic field that moves a switch (usually a set of contacts). When the relay is energized, the contacts either open or close, depending on the type of relay, to control the flow of electricity in the main circuit. Relays are typically used in situations where a low voltage circuit needs to control or protect a high voltage system. The control signal could come from various devices, including a microcontroller, switch, or sensor.