The AIRPAX / SENSATA 209 series hydraulic magnetic circuit protectors offer a compact and reliable solution for branch circuit protection. These breakers combine power switching with accurate protection, making them suitable for a wide range of applications including EDP, air conditioners, panel boards, and lighting controls. Utilizing the hydraulic-magnetic principle, the 209 family adapts to local conditions, minimizing nuisance tripping caused by temperature variations. The unique 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 performance and protection.