The Siemens 3VA2163-5HL36-0AB0 is a 3-pole SENTRON molded case circuit breaker rated for 63 A continuous current at 40 °C, with an ETU320 electronic trip unit providing line protection. The 63 A rating holds across 40 °C to 50 °C without derating; above that it steps down to 60.6 A at 55 °C and 53.6 A at 70 °C.
Trip unit and auxiliary contacts
If you need communication or phase-failure detection, this base version doesn't carry those modules; the 3VA platform offers them on other order codes. The breaker is rated for 20,000 mechanical/electrical endurance cycles — standard for a 63 A frame in this class. Maximum power loss is 4 W, which keeps heat manageable inside a sealed enclosure.
The interrupting capacity drops to 4.25 kA at 690 V — that's the limit of the frame at that voltage; verify coordination with upstream devices if you're running a 690 V distribution.