The Airpax AP series magnetic circuit protectors offer a robust solution for power switching and circuit protection. Unlike thermal protectors, the AP maintains a consistent trip current across a wide temperature range. These protectors are available in DC, 50/60Hz, or 400Hz versions with customizable delays to suit specific application needs. The 'trip-free' action ensures the circuit opens even when the handle is held in the ON position. Applications include communication, navigation, aircraft instrumentation, radar, and power supplies. The UP series, UL and CSA certified, offers an optional FM approval for petrochemical environments. AP-MIL protectors adhere to MIL-PRF-39019 standards, ensuring a rigorous production and testing program.