The Airpax/Sensata 209 series combines power switching with accurate and reliable circuit protection in a compact, single or multi-pole unit. These hydraulic magnetic circuit protectors are ideal for branch circuit applications such as EDP, air conditioners, panel boards, and lighting controls. The magnetic/ampere turn principle minimizes nuisance tripping due to temperature variations, and the inertial delay is standard for 50/60Hz time delay units. They withstand high pulses without tripping and are available with various terminal styles and configurations to meet diverse application needs.