Derating and thermal performance
Above that, it derates linearly: 375 A at 55 °C, 350 A at 60 °C, 325 A at 65 °C, and 300 A at 70 °C. The maximum power loss is 98.5 W, which factors into enclosure heat calculations.
Breaking capacity by voltage level
This MCCB's interrupting rating varies with system voltage: 242 kA at 240 V, 187 kA at both 415 V and 440 V, 121 kA at 500 V, and 7.5 kA at 690 V. The 690 V figure looks low, but that's typical for a 400 A frame at that voltage — verify your fault current at the point of installation doesn't exceed 7.5 kA if you're running a 690 V system. For standard 400 V class distribution, 187 kA gives generous headroom.
Auxiliaries and communication
It also supports communication functions — meaning it can integrate with a BMS or SCADA system for remote monitoring and tripping. The base switch variant is 3VA2340-6JP32-0AA0 if you need a reference for spare aux kits.