MARS 61336 2 Pole 20 FLA Professional Grade Definite Purpose Contactor with Box Lug/Dual QC Terminal is Engineered for Today's Most Demanding Commercial Refrigeration, Air Conditioning and Electric Heating Systems. The Enclosed Body Provides a Quieter Running Contactor and a Longer Life Expectancy while the Oversized 'Arch Window' Simplifies Wiring. The High Performance Copper and Brass Conductors Maximize Current Carrying Capabililty, Creating a Cooler Running Contactor