It carries a continuous current of 63 A across ambient temperatures from 40 °C to 50 °C, then derates to 56.7 A at 70 °C — so for a panel running warm, you size the load at the 70 °C figure, not the 63 A nameplate.
This MCCB interrupts 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at 690 V. Those are the maximum fault currents it can safely clear at each voltage level. The 690 V rating (17 kA) covers 600 V class installations, though at a lower interrupting capacity.
The 3VA1163-5ED32-0CH0 measures 130 mm high by 76.2 mm wide by 70 mm deep. The undervoltage release (UVR) is also integrated — if the control voltage drops, the breaker trips, which is typical for emergency-stop or safety circuits.