Relay isolation refers to the ability of a relay to separate two different sections of a circuit, preventing the direct flow of electrical current between them. This separation is essential for protecting sensitive components from voltage spikes, electromagnetic interference, and ground loops, which can cause malfunctions or permanent damage. The isolation is achieved through the use of a mechanical switch or an electromagnetic barrier that ensures there is no direct connection between the high-power and low-power sections of the system.

    In simple terms, a relay with isolation allows two circuits to communicate without directly connecting them. This is especially useful in applications where high-voltage and low-voltage components must work together, but safety and protection are paramount.