Time Delay Relays are in stock at Tenco Electronics. Time delay relays are simply control relays with a time delay built in. Their purpose is to control an event based on time. The difference between relays and time delay relays is when the output contacts open & close: on a control relay, it happens when voltage is applied and removed from the coil; on time delay relays, the contacts can open or close before or after some time delay.Tenco offers inventory, pricing, & datasheets for Time Delay Relays. To know more, please view our large section of Time Delay Relays below.