At 415 V it still interrupts 121 kA, so it's comfortable on 400 V distribution in industrial plants. The undervoltage release (UVR) is built in, which means a voltage dip or intentional drop-out trips the breaker — common on safety-disconnect or emergency-stop circuits where you want the load isolated when control power vanishes.
If your panel runs hot (stacked drives, transformer nearby), size the load side for the 70 °C figure, not the nameplate. Dimensions are 105 mm wide × 181 mm high × 86 mm deep — standard 3-pole MCCB footprint for a SENTRON 3VA frame.
