The 3VA1163-5EF46-0AA0 is a Siemens SENTRON 4-pole molded case circuit breaker rated 63 A continuous at 40 °C, with the TM240 thermal-magnetic release handling overload and short-circuit protection for line protection duty. At 440 V it's rated 75.6 kA, and at 500 V or 690 V it drops to 17 kA — still respectable for most motor control center applications, but you'll want to verify the available fault current at the point of installation. The 63 A rating holds steady up to 50 °C; above that it derates smoothly to 58 A at 70 °C, which the spec table lays out in 5 °C steps.
This MCCB measures 70 mm deep by 101.6 mm wide by 130 mm tall — a compact footprint that fits standard panel-mount cutouts for 4-pole breakers in this class.