The AIRPAX / SENSATA 219-3-1-66-8-2-7.5 is a hydraulic magnetic circuit protector within the 209 series family. It offers a combination of power switching and accurate, reliable circuit protection in a compact, single or multi-pole unit, suitable for branch circuit applications like EDP, air conditioners, panel boards, and lighting controls. Utilizing the hydraulic-magnetic principle, it adapts to local environments and minimizes nuisance tripping due to temperature variations. It withstands high pulses without affecting normal delay curves.