The AP17-1-64-252 is a two-pole, fully sealed magnetic circuit protector that combines power switching with reliable overcurrent protection. This model features a series-trip configuration with screw terminals, a nominal current rating of 2.5A, and is designed for 50/60Hz applications. It incorporates a high pulse, short time delay mechanism, making it tolerant to inrush currents without nuisance tripping. Like all AP series protectors, it provides a trip-free action, ensuring the circuit opens during an overload even if the handle is held ON, and its trip point is stable over a wide temperature range. Its robust, sealed design makes it suitable for demanding environments such as communication systems, aircraft instrumentation, radar, and power supplies.