This Guardian Electric A420-065757-00 is an industrial time delay relay. It is a 24-volt ac/dc controlled, single voltage model and has a NEMA 1 enclosure. It has a total of two variable timing ranges, adjustable from 0.05 to 6 seconds and 0.3 to 45 seconds and has a maximum repeatability of 0.2 to 3 seconds. It offers adjustable performance with vibration and shock resistant operation, as well as a built-in surge suppression device. The device is rated for 40A 240VAC resistive, with a maximum contact current of 700 mA. It is UL, cUL, and TUV listed and CSA certified.