The 21009-85 is a 375 Series 3-pole, 30-amp power relay manufactured by Deltrol Controls, designed to control electrical loads in industrial applications. This relay features a 240 VAC coil with a nominal coil power of 4.6 VA and operates with a pickup voltage of 85% or less of nominal, with an operate time of approximately 15 milliseconds. The contacts are constructed from 1/4" diameter silver cadmium oxide material, rated for 30 amps at 300 VAC (80% power factor) and 30 amps at 28 VDC, 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 CE marked per EN60947-4-1, with a coil molded in Rynite® PET providing Class F temperature insulation. It is commonly used in electric heat, motor control, and power supply applications as a low-cost alternative to small contactors.