Its interrupting capacity reaches 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 7.5 kA at 690 V — so it handles high-fault-current service entrances and large motor branch circuits without cascading upstream. The 400 A frame holds the rating across 40–50 °C ambient; above that it derates linearly to 340 A at 70 °C, which matters when the breaker sits in a crowded enclosure with limited airflow. The auxiliary and alarm contacts give the PLC or SCADA a positive status of the breaker position, not just a shunt-trip signal.
Dimensions are 248 mm high, 184 mm wide, and 110 mm deep. Depth of 110 mm leaves clearance for rear-connected busbars and cable lugs inside a typical 600 mm deep enclosure. The breaker accepts front-mounted rotary handles or motor operators from the SENTRON accessory family.
The interrupting ratings (187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 500 V, 7.5 kA at 690 V) define the maximum fault current the breaker can safely clear at each voltage level. The thermal derating table (385 A at 55 °C, 370 A at 60 °C, 355 A at 65 °C, 340 A at 70 °C) tells you the actual ampacity when the breaker is in a warm panel; never size a feeder at the 40 °C rating if the ambient inside the enclosure exceeds that.