The AIRPAX / SENSATA 209 series hydraulic magnetic circuit protectors offer a robust solution for branch circuit protection. These breakers combine power switching with accurate and reliable protection in a compact, single or multi-pole unit, making them suitable for applications like EDP, air conditioners, panel boards, and lighting controls. Utilizing the hydraulic-magnetic principle, the 209 family adapts to various environments, minimizing nuisance tripping due to temperature variations. The inertial delay feature is standard for 50/60Hz units, providing protection against inrush currents from transformers, lamps, and capacitive filters. The 209 series withstands high pulses without affecting normal delay curves, ensuring consistent protection.