IULHK111-1REC4R-66-15.0-01 is a three-pole hydraulic magnetic circuit protector manufactured by Airpax/Sensata, designed for reliable circuit protection and power switching in international applications. The unit features a rated current of 15.0 A with a 4R (50/60 Hz long delay) characteristic, providing trip time ranges from 5 to 70 seconds at 150% load and 2.2 to 25 seconds at 200% load. It is equipped with one toggle handle per unit with black and white markings, and operates at 66 V with UL 1077 and CSA certification for 5000 AIC (Ampere Interrupting Capacity). This protector is suitable for equipment requiring accurate circuit control and protection in industrial and commercial environments where compliance with international standards is essential.