400 A MCCB with high interrupting capacity for line protection
It carries a 187 kA interrupting rating at 240 V, stepping down to 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 11.9 kA at 690 V — high enough to handle most fault-current scenarios in industrial mains without cascading upstream breakers.
That matters when the breaker shares an enclosure with other heat sources — plan the thermal budget accordingly. The 3-pole footprint is the same as other SENTRON 3VA frames in this class, so panel cutouts and busbar layouts carry over.