The Airpax™ AP series are fully sealed, magnetic circuit protectors designed to combine power switching with accurate and reliable circuit protection. These protectors incorporate inverse time delays and a trip-free feature, ensuring safety and preventing continued circuit closure even when the handle is in the ON position. Available in DC, 50/60Hz, or 400Hz versions, they cater to diverse application requirements. The AP series is suitable for communication, navigation, aircraft instrumentation, radar, and power supplies. The UP series, with UL and CSA certification, offers similar functionality and is approved for various voltage and current ratings. The AP-MIL protectors, manufactured according to MIL-PRF-39019, undergo rigorous testing to maintain their Qualified Products Listing (QPL). Multi-pole configurations, such as the AP12 (two-pole) and AP112 (three-pole), provide protection for multiple circuits and offer flexible combinations of series, shunt, and relay configurations.