It's a 3-pole unit rated for 63 A continuous current — and it holds that 63 A rating across the full ambient temperature range from 40 °C to 70 °C, so no derating curve to chase when the panel runs hot. The interrupting capacity is what makes this part stand out in a fault-current study: 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 3.7 kA at 690 V. Pure line protection with UVR for safety interlocks.
The 86 mm depth (3.39 in) means it clears most shallow backboxes — check your gland plate clearance, but it's not a deep-frame breaker.