IUGH666-1-61-50.0-01 is a hydraulic magnetic circuit protector from the Airpax IUG series, designed for reliable circuit protection and power switching in international equipment applications. This single-pole unit features a 50.0A rated current with a 50/60Hz short delay (61) trip characteristic, providing accurate circuit control. The device is available with push-on terminals and toggle handle configuration marked with ON-OFF I-O indicators. It is designed to comply with IEC 601 and 950 and VDE 0804 and 0805 specifications, making it suitable for equipment requiring international safety certifications. Common applications include industrial equipment, automation systems, and power distribution where low-cost switching and dependable overcurrent protection are essential.