The AIRPAX/Sensata LELK1-1RS4-27129-912 is a hydraulic magnetic circuit protector offering low-cost power switching, reliable circuit protection, and accurate circuit control for equipment in the international marketplace. These protectors are UL listed, CSA certified, and CCC Approved, meeting various industry standards. Available in single or multi-pole versions, they cater to diverse applications including polyphase circuits and single-phase three-wire systems. The auxiliary switch, offered with gold or silver contacts, enhances functionality for SELV and hazardous voltage applications.