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. They are suitable for a wide range of applications including EDP, air conditioners, panel boards, and lighting controls. The hydraulic-magnetic principle minimizes nuisance tripping due to temperature variations, and the unique inertial delay feature is standard for 50/60Hz units, adapting to local environments. The 209 series withstands high pulses without affecting normal delay curves, ensuring consistent protection.