Its interrupting capacity hits 121 kA at 240 V and 75.6 kA at 415 V, giving solid headroom for high-fault utility feeds or transformer secondaries where a standard MCB would weld shut.
Ratings in context
Thermal current holds flat at 100 A from 40 °C up to 50 °C, then derates gradually to 91 A at 70 °C. That means a panel at 50 °C ambient still gets the full 100 A rating — no early downsizing. Interrupting ratings step down with system voltage: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V. Power loss is 27.5 W at rated load.
The 3-pole footprint matches the standard SENTRON 3VA mounting pattern — existing busbar and DIN-rail layouts for earlier 3VA frames accept this unit without drilling or adapter plates. The UVR ensures the breaker trips on loss of control voltage — common in emergency-stop chains or undervoltage protection schemes.