IUGN6-1-51-15.0 is a single-pole hydraulic magnetic circuit protector from the IAG/IUG/IEG/CEG/LEG series designed for reliable circuit protection and accurate circuit control in international equipment applications. This unit features a 15.0 ampere rated current with delay 51 characteristic, providing short delay response suitable for general-purpose applications. The protector operates with DC resistance of 0.055 ohms at rated current and AC impedance of 0.051 ohms at 50/60 Hz, ensuring minimal voltage drop during normal operation. The delay 51 curve provides trip times ranging from 0.5 to 6.5 seconds at 125% rated current down to 0.004 to 0.08 seconds at 1000% rated current, offering fast response to fault conditions while avoiding nuisance trips. This circuit protector is commonly used in automation systems, sensitive electronic equipment protection, and applications requiring precise overcurrent response characteristics.