The ACB E4.2H is a 3P circuit breaker with a rated current (In) of 4000 A. It has an Icu rating of 100 kA at 415 VAC, indicating its ability to interrupt short-circuit currents. The circuit breaker also has a rated short-time withstand current, Icw (1s), of 85 kA. The ACB E4.2H features a withdrawable auto EKIP touch LSIG trip unit, which provides protection against overloads, short circuits, and ground faults. The shunt opening for the trip unit is compatible with both 110-120 VAC and 110-120 VDC power sources. This circuit breaker is complete with WMP+FP+YO components, ensuring comprehensive functionality and performance.