The TEF4-ON is a front-mounted electronic timer that provides ON-delay functionality for ABB contactors. It operates on a wide rated control circuit voltage range of 24 to 240V AC/DC. This model features a selectable time delay range of 1 to 10 seconds and is equipped with one normally open (NO) and one normally closed (NC) auxiliary contact. The TEF4-ON is designed for seamless integration with AF09(Z) to AF38(Z) contactors and NF(Z) contactor relays, making it ideal for motor control and automation applications requiring timed switching sequences.