The Airpax/Sensata 209 series is a family of hydraulic-magnetic circuit breakers designed for branch circuit applications such as EDP, air conditioners, panel boards, and lighting controls. These breakers offer accurate and reliable protection in a compact, single or multi-pole unit. The hydraulic-magnetic principle minimizes nuisance tripping due to temperature variations, and the inclusion of inertial delay addresses inrush currents from transformers and lamps. Available with various configurations and terminal styles, the 209 series provides a versatile solution for a wide range of industrial applications.