The ABB AF161F2-2E11 is a three-pole AF16 contactor with a NEMA 3R/4/12 enclosure and a 100-250 V coil. The NEMA 3R/4/12 rating means the enclosure is suited for indoor or outdoor use where protection against rain, sleet, dust, and hose-directed water is needed — common on HVAC units, pump panels, and conveyor junction boxes.
The 100-250 V coil covers a wide control-voltage range, so it works across 110 V, 120 V, 208 V, 220 V, and 240 V control circuits without swapping coils — useful when a panel has mixed control voltages or when the line voltage fluctuates. The NEMA 3R/4/12 enclosure eliminates the need for a separate enclosure in washdown or outdoor locations, saving panel space and installation labor. The AF16 frame is a compact three-pole design; verify the terminal lug range against your cable size before terminating.