A16 contactors are usually used for controlling 3-phase motors and normally for managing power circuits up to 690 V AC or 220 V DC. Numerous additional uses for contactors exist, including lighting, capacitor switching, and isolation. Block type design characterizes the 1-stack 3-pole contactors in the A... series. - Main poles and auxiliary contact blocks: front and side-mounted add-on auxiliary contact blocks, one built-in auxiliary contact, and three main poles - Control circuit: laminated magnet circuit with AC operation - Accessories: A large selection of accessories is offered.