The 20311-81 is a 160 Series general-purpose plug-in relay manufactured by Deltrol Controls, designed for industrial machine control and energy management systems. This DPDT (Double Pole Double Throw) relay features a 13 Amp contact rating at 120 VAC and operates with a 24 VDC coil, providing reliable switching for electrical loads up to 1/3 HP at 120 VAC. The relay incorporates Class F coil insulation rated for 155°C total temperature, with the coil molded in Rynite® PET for environmental protection and enhanced durability. It delivers approximately 15 milliseconds operate and release times, with an electrical life of 100,000 operations at rated load and mechanical life of 10,000,000 operations. The relay is UL recognized (File No. E37066) and features fine silver contacts with gold flash plating as standard, making it suitable for demanding industrial control panels and automation systems.