The REL-MR-230AC/21-21/MS is a single relay from Phoenix Contact. It features power contacts, two changeover contacts, a test button, a mechanical switching position indicator, and a status LED. It operates with a coil voltage of 230 V AC and supports a wide input voltage range of 179.4 V AC to 333.5 V AC.

This relay is designed for durability, with a mechanical service life of up to 5 million cycles. It can handle a maximum switching voltage of 250 V AC/DC and a limiting continuous current of 8 A. It also includes features like integrated manual operation and a status LED for convenience.