Allen-Bradley 509-AOD AC Relay Coil 120 VAC Industrial Grade

Allen-Bradley 509-AOD is a NEMA Size 0, full-voltage, non-reversing motor starter that pairs a three-pole AC contactor with an eutectic alloy overload relay. This open-type device uses a 120 V AC coil at 60 Hz and includes one normally open auxiliary contact for control interlock or signaling. Rated for up to 18 A full-load current and a maximum 600 VAC across the contacts, it is designed for robust motor control in industrial panels where compact footprint matters. Common applications include conveyors, pumps, fans, and machine tools, offering straightforward integration with Bulletin 509 control systems in non-reversing 3-phase motor startups. The eutectic overload relay provides overcurrent protection that trips on sustained overload, helping shield the driven equipment and wiring in routine industrial environments.