Allen-Bradley 100-A18NZJ3 Contactor

The Allen-Bradley 100-A18NZJ3 Series B three-pole contactor is an 18 A, 3‑phase motor starter designed for use in Bulletin 100 motor-control systems. It energizes from a 24 V AC, 60 Hz coil and includes one normally open auxiliary contact to support basic control logic. The main contacts are rated to withstand up to 600 V across the load, with horsepower ratings of 5 HP at 200 V, 5 HP at 230 V, 10 HP at 460 V, and 15 HP at 575 V, enabling it to drive a range of medium-size motors. As a Series B unit, it adheres to the standard 100-A form factor for straightforward mounting and replacement in existing panels and MCCs. Typical applications include starting and stopping three-phase motors in equipment such as conveyors, pumps, and fans where compact, reliable switching is essential in industrial automation. This model’s 24 V AC control coil makes it compatible with common control circuits and transformers found in standard control architectures, and it belongs to Allen-Bradley’s widely used 100-A family, known for robust performance in demanding industrial environments.