The LELK1-1RS4-30452-25 is a single-pole hydraulic-magnetic circuit protector from the LEL series, designed for reliable power switching and overcurrent protection. It is configured with stud terminals and features a series trip mechanism with an integrated alarm switch and electrical trip capability via a .110 quick connect terminal. This trip-free device ensures circuit interruption during an overload, even if the handle is held in the ON position, and operates over an ambient temperature range of -40°C to +85°C. As part of the LEL family, it is UL listed under UL 489 and designed to meet various international standards, making it suitable for demanding global applications.