63 A line protection with serious interrupting capacity
The Siemens SENTRON 3VA1163-5EF32-0HA0 is a 3-pole molded case circuit breaker rated for 63 A continuous current at 40 °C, with a TM240 thermal-magnetic overcurrent release. The shunt trip (STL) auxiliary release (order code 3VA9688-0BL30) is integrated, so remote tripping for emergency-stop or supervisory control is wired in from the factory — no field-add kit needed. Depth is 70 mm.
At 55 °C it drops to 60.48 A, and it steps down gradually to 56.7 A at 70 °C. For a panel builder stuffing a 63 A feeder into a 50 °C enclosure, that flat curve means you don't oversize the breaker for ambient heat. The latching endurance of 15,000 operations covers the mechanical life; the electrical endurance depends on the switching duty, but for a line-protection breaker that sees infrequent fault interruption, that's plenty.