The AIRPAX / SENSATA 279-1-1-53-9-9-80 is a hydraulic magnetic circuit protector within the 209 series, offering a combination of power switching and reliable circuit protection in a compact, single or multi-pole unit. It's suitable for a wide range of applications including EDP, air conditioners, panel boards, and lighting controls. The magnetic/ampere turn principle minimizes nuisance tripping due to temperature variations, and it's designed to withstand high pulses without affecting normal delay curves. Available with various terminal styles and configurations to meet specific application needs.