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标题: Understanding Relay Voltage Rating: Key Considerations for Safe and Reliable Operation Relay voltage rating is a crucial specification in the design and application of relays, ensuring both safety and reliability in electrical circuits. Relays are electromechanical devices that control the flow of current in a circuit by opening or closing contacts in response to an applied voltage to the coil. Understanding the voltage rating of a relay is essential for engineers, technicians, and hobbyists alike, as improper selection can lead to device failure, safety hazards, or inefficient operation.