IULHK111-1-72-100.-01 is a single-pole hydraulic magnetic circuit protector from the IAL series designed for reliable circuit protection and power switching in international applications. This device features a rated current of 100 amperes with 50/60 Hz long delay (type 72) operating characteristics, providing accurate circuit control with trip time ranges from 1.8 to 100 seconds at 125% rated current and progressively faster response at higher overload levels. The unit incorporates a handle per unit configuration with bullet terminals and operates with a nominal DC resistance of 0.00135 ohms at 100 amperes, ensuring minimal voltage drop during normal operation. The protector is suitable for applications requiring dependable overcurrent protection in power distribution systems, industrial equipment, and control circuits where both thermal and magnetic protection mechanisms are essential for equipment safety.