The XT series offers several optional features including a test lever which is optionally lockable and is available to help in the troubleshooting of circuits. This option also includes a mechanical, visual indicator. However, if another type of visual indicator is preferred, Tyco Electronics offers an optional LED to indicate whether power is reaching the relay coil. DC coil versions of the XT are also offered with an optional protection diode. The innovative design and features of the XT, along with competitive pricing, make it an attractive solution for any suitable application.