The Siemens 3VA1063-4ED32-0DH0 is a 3-pole SENTRON molded case circuit breaker rated for 63 A continuous current at 40 °C, with a TM210 thermal-magnetic overcurrent release. At 415 V it still holds 75.6 kA, and at 690 V it drops to 11.9 kA, so the voltage-dependent curve governs where you place it in the distribution. The undervoltage release (UVR) built in lets a safety circuit or emergency-stop chain drop the breaker open when control voltage is lost, which is standard for machine-tool and conveyor infeeds where loss of control power should kill the load. Auxiliary contacts are 2 form-C plus a separate trip-alarm switch (HQ), so you get both status feedback (open/closed) and a dedicated fault signal — no need to add an external aux block for most panel-wiring schemes.
Thermal derating — the real-world current
Above that it steps down: 60.48 A at 55 °C, 59.22 A at 60 °C, 57.96 A at 65 °C, and 56.7 A at 70 °C.