The AIRPAX/SENSATA 209, 219, 229, 249, and 279 series hydraulic magnetic circuit protectors combine power switching with accurate and reliable circuit protection in a compact, single or multi-pole unit. Designed for branch circuit applications like EDP, air conditioners, panel boards, and lighting controls, these protectors adapt to local environments and minimize nuisance tripping due to temperature variations. The inertial delay feature is standard for 50/60Hz units, handling inrush currents from transformers, lamps, and capacitive filters. Available with various terminal styles and configurations, these circuit breakers offer versatility for diverse industrial applications.