The Siemens 3VA2163-5KP36-0AA0 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. Three poles, line-protection design, with an ETU850 electronic overcurrent release that gives you adjustable trip curves for selectivity coordination downstream. Breaking capacity hits 187 kA at 240 V and 121 kA at 415 V, so it handles high-fault utility feeds without cascading upstream. At 690 V it still clears 3.7 kA — enough for most industrial motor circuits at that voltage.
Dimensions: 105 mm wide by 181 mm tall by 86 mm deep — three-pole wide, so plan for that slot width in the gland plate layout. Communication function is built in (no external module needed for basic signaling), and the ETU850 release supports ground-fault and other measurement functions if you enable them.