IALN1-1-51-75.0 is a single-pole hydraulic magnetic circuit protector from the IAL series designed for reliable circuit protection and power switching in industrial applications. This device features a DC long delay (51) trip characteristic with a rated current of 75.0 amperes and operates with a DC resistance of 0.003 ohms at rated current. The unit is equipped with one handle per unit and includes a panel seal (IALN designation), with standard screw terminal connections and a panel thickness of 0.062 ± 0.005 inches (1.57 ± 0.13 mm). The protector provides accurate circuit control and low-cost protection suitable for equipment in the international marketplace, with applications in power distribution, motor control, and industrial switching systems where dependable overload and short-circuit protection is essential.