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 ideal for a wide range of applications including EDP, air conditioners, panel boards, and lighting controls. The hydraulic-magnetic principle allows the protector to adapt to local conditions, minimizing nuisance tripping caused by temperature fluctuations. The inertial delay feature is standard for 50/60Hz units, providing protection against inrush currents from transformers, lamps, and capacitive filters. Available in various configurations and terminal styles, the 209 series provides versatility for diverse industrial needs.