The Siemens 3VA2163-5HN36-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for 63 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling.
Breaking capacity and what it means for your fault level
At 240 V the interrupting rating is 187 kA; at 415 V and 440 V it holds at 121 kA; at 500 V it drops to 75.6 kA; at 690 V it is 3.7 kA.
The breaker measures 105 mm wide, 181 mm high, and 86 mm deep. That 86 mm depth is the projection behind the panel face — relevant when planning gland-plate clearance or enclosure depth. The 105 mm width is the standard 3-pole MCCB footprint for this SENTRON generation; it fits the same cutout as earlier 3VA frames.