The L&T MCX-12 63A 4 Pole Power Contactor is a great choice for those who need a reliable and durable contactor. It is made of high quality materials and is designed for long lasting use. Contactors are electrical devices used to switch an electrical circuit on or off by estaablishing or interrupting the conductive path between the poles. The L&T MCX-12 is a 63 Amp AC3 4 Pole contactor that is both competitively priced and of the best quality. This product is FR-2 sized.