IUGN66-1-61-15.0 is a single-pole hydraulic magnetic circuit protector from the IAG/IUG/IEG/CEG/LEG series designed for reliable circuit protection and power switching in international equipment. This unit features a delay 66 characteristic with a pulse tolerance of approximately 25 times rated current, providing long-delay protection suitable for special motor applications and sensitive electronic equipment. The protector operates at a maximum voltage of 250V AC at 50/60Hz frequency with a rated current of 15.0 amperes, offering a short-circuit rating of 3500 amperes under UL/CSA standards. The single-pole configuration includes standard mounting provisions with 2X 6-32 thread holes (3.56 mm deep) and optional M3 ISO threads, with overall dimensions of approximately 2.0 inches (50.80 mm) in length. This circuit protector is ideal for applications requiring precise trip-time control in automation systems, motor protection, and transformer/capacitor load management where inrush current handling and circuit reliability are essential.