Allen-Bradley 509-BOD is an open-type, full-voltage, non-reversing motor starter (contactor) built on a NEMA Size 1 frame to switch 3-phase motors, with a 120 V AC coil. The standard coil rating is 110/120 V at 50/60 Hz, and the unit is configured as a 3-pole open-type starter (without enclosure) for direct motor control. Variants include models such as 509-BOD-A2F-17-901, which adds a surge suppressor and two auxiliary contacts, and other catalog entries show configurations like 509-BOD-A2F-900 with two normally open auxiliary contacts; some listings also quote a 27 A rating for Size 1 devices, as seen on the 509-BOD-9-17 variant.
