The TDM120AL Time Delay Relay from Littelfuse (TDM Series) is an on-delay timer designed for 120 V AC control circuits, with a socketable package for quick drop-in replacement. It uses DPDT (2 Form C) contacts and can switch up to 10 A at 120/240 VAC, making it suitable for sequencing and timed-control tasks in industrial automation. The timer covers a delay range from 1 to 1023 seconds in 1-second increments, and, once the delay elapses, the output energizes and remains energized until the input voltage is removed. Typical applications include motor and valve sequencing, indicator control, and other loads in control panels that require a defined delay before activation.
