The Airpax/Sensata 209 series hydraulic magnetic circuit protectors offer a compact, single or multi-pole solution for power switching and circuit protection. Designed for branch circuit applications, these protectors utilize the hydraulic-magnetic principle to adapt to various environments and minimize nuisance tripping due to temperature fluctuations. They withstand high pulses without affecting normal delay curves, providing robust protection for applications like EDP, air conditioners, panel boards, and lighting controls. Available in various configurations and terminal styles, the 209 series provides a versatile solution for diverse industrial needs.