Its interrupting capacity hits 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 40 kA at 690 V — so it handles high-fault utility feeds and large motor branch circuits without cascading upstream. The 110 mm depth and 138 mm width keep it within a standard MCCB footprint for retrofit into existing SENTRON or third-generation 3VA panelboards.
Thermal derating — the real ampacity for your enclosure
At 50 °C it derates to 570 A; at 60 °C to 510 A; at 70 °C to 450 A. If your panel runs warm — say a packed MCC lineup or a sun-loaded outdoor enclosure — use the 50 °C or 60 °C column for sizing, not the 40 °C headline. The maximum power loss of 162 W also factors into ventilation planning; a sealed stainless enclosure may need forced air at that dissipation level.
Trip unit and auxiliary contacts
The ETU850 release provides electronic overcurrent protection with adjustable settings — it's the programmable tier in the 3VA family, not the basic thermal-magnetic.