IULHK11-1-42-20.0-01 is a two-pole hydraulic magnetic circuit protector manufactured by Airpax/Sensata Technologies, designed for reliable circuit protection and power switching in international applications. This unit features a 20.0 ampere rated current with a 400 Hz long delay (delay code 42) trip characteristic, providing extended protection suitable for transformer and capacitor loads. The device includes one toggle handle per unit with black handle and white markings, and is configured with series construction allowing for auxiliary switch integration. The two-pole configuration has a panel mounting dimension "A" of 1.530 ± 0.007 inches (38.86 ± 0.18 mm) and accommodates a panel thickness of 0.062 ± 0.005 inches (1.57 ± 0.13 mm). This circuit protector is ideal for equipment requiring accurate circuit control and low-cost power switching in industrial and commercial applications where compliance with international standards is necessary.