The A9N18548 is a residual current device (RCCB) designed for electrical protection in distribution systems. It features a 125A current rating, 4 poles, and a leakage sensitivity of 300 mA. The device operates with a Type AC protection class at 415V AC, offering selective and delayed instant protection against earth leakage. It has a depth of 73 mm, weighs approximately 0.58 kg, and is equipped with tunnel-type terminals compatible with 1 to 35 mm² connections. The A9N18548 is built for durability, supporting up to 20,000 mechanical cycles, and is suitable for use in systems operating at 50/60 Hz with rated voltages between 230 V and 415 V AC.

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