The IELHK11-1-72-20.0-01-V is a two-pole, series trip hydraulic-magnetic circuit protector designed for reliable power switching and overcurrent protection. It features a current rating of 20.0 amperes and a long delay curve (delay 72) suitable for both DC and 60Hz AC applications, tripping between 1 and 20 seconds at 200% of its rated load. This protector is trip-free, ensuring it opens on overload even if the handle is held on, and operates over a wide temperature range of -40°C to +85°C. Its hydraulic-magnetic design ensures the trip point is unaffected by ambient temperature changes, providing precise and repeatable performance. This VDE-approved device is ideal for use in telecommunications, industrial controls, and power distribution equipment requiring accurate circuit control and protection.