IUGN66-1-64-20.0 is a hydraulic magnetic circuit protector from the IAG/IUG series designed for low-cost power switching and reliable circuit protection in international equipment applications. This two-pole unit features a 20.0 ampere rated current with a 66-type delay characteristic, providing a pulse tolerance of approximately 25 times rated current. The protector is available with screw terminals (metric M5 x 5mm for ratings >30A) and includes standard auxiliary switch configuration with dimensions of 2.52 inches maximum length (64.00 mm). The device operates at 50/60 Hz frequency and is suitable for equipment requiring accurate circuit control and protection in automation systems and sensitive circuitry applications where reliable overload sensing and trip response are essential.