This Square D Magnetic Definite Purpose Contactor is an open style, 3-pole contactor. It has double-break contacts to help improve safety. Auxiliary contact modules snap onto either side for fast expansion. The included box lugs and industry-standard mounting help provide a more reliable connection and easier wiring and installation. A Type-1 enclosure and DIN rail-mounting bracket (sold separately) may help reduce installation costs. 208/240VAC coil volts. 40A (inductive) and 50A (resistive). 600V max. Mechanical life is approximately 500,000 operations. Suitable for heating, air conditioning, and refrigeration applications.