The AIRPAX/SENSATA 209 series hydraulic magnetic circuit protectors offer a compact and reliable solution for branch circuit applications. These circuit breakers combine power switching with accurate protection, suitable for environments where temperature fluctuations are a concern. The magnetic/ampere turn principle minimizes nuisance tripping, and the unique inertial delay is standard for 50/60Hz units, adapting to local conditions. They withstand high pulses without affecting normal delay curves, ensuring consistent protection.