The AIRPAX/SENSATA 219-4-24237-1 is a hydraulic-magnetic circuit protector within the 209 series family. It provides a combination of power switching and reliable circuit protection in a compact, multi-pole unit, ideal for branch circuit applications like EDP, air conditioners, panel boards, and lighting controls. Utilizing the hydraulic-magnetic principle, the protector adapts to local conditions and minimizes nuisance tripping due to temperature variations. It also incorporates an inertial delay to handle inrush currents from transformers and lamps. The protector withstands high pulses without affecting normal delay curves, ensuring consistent protection.