ATC 319D-016-R-1-C Time Delay Relay

The ATC 319D-016-R-1-C Time Delay Relay (Marsh Bellofram / ATC) is a two-form-C timing relay designed for 120/240 VAC control circuits. It provides two SPDT outputs that can switch separate loads after a fixed ON-delay, with each contact rated up to 5 A at 120 VAC, making it suitable for sequencing pumps, motors, or other control elements in industrial panels. The device offers a timing range from 1.5 seconds to 15 seconds and is configured for 60 Hz operation, delivering a predictable delay to coordinate interlocks and start sequences. Visual feedback is provided by an LED that indicates timing in progress and a Timed Out LED that turns on when the delay has elapsed, helping operators verify the timing state at a glance. The 319D-016-R-1-C variant identifies a specific timing channel within the ATC family, ensuring compatibility with installations that rely on fixed, repeatable delay intervals for safe and orderly load transitions. In practice, engineers use this relay to implement controlled delays between control signals and the corresponding outputs, balancing startup surges and ensuring orderly machine or process sequencing without manual intervention.