IELK1-1-72-40.0-01-V is a single-pole hydraulic magnetic circuit protector designed for reliable circuit protection and power switching in international applications. This device features a DC long delay (72) trip characteristic with a rated current of 40.0 amperes, providing accurate circuit control with standard screw terminal configuration and a black toggle handle with white markings. The unit is VDE approved to VDE 0660, part 101, and meets installation Category III, pollution degree 3 requirements as specified in IEC 664, making it suitable for equipment designed to comply with IEC 380, 435, 601 and VDE 0730, 0804 & 0805 standards. The protector offers precise trip time performance across various current levels, with trip time tolerance of ±50% for currents between 21 and 50 amperes, ensuring dependable protection in industrial and commercial power distribution systems.