The ABB MCCB XT4H is a 250A frame, 3P (three-pole) circuit breaker with a fixed rating of 70kA. It has an In (rated current) of 100A and I1 (adjustable overload current range) of 100-250A. The S-I2 (short-time withstand current range) is 150-2500A, and the I-I3 (instantaneous trip current range) is 375-2500A. This MCCB features a touch LSI (Long-Time, Short-Time, Instantaneous) trip unit with class 1 metering. It has front terminals for easy installation and is manufactured by ABB.