What the ratings mean for your panel
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. Its breaking capacity hits 187 kA at 240 V AC and still delivers 121 kA at 415 V — numbers that matter when you're coordinating downstream gear in a high-fault industrial panel and need the upstream device to clear a bolted fault without the arc flash going nuclear. 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. That derating curve is useful if this breaker sits in a hot enclosure near transformers or drives.
Mounting and integration
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. The front face carries an IP40 protection rating, meaning it's protected against tools and wires greater than 1 mm but isn't sealed against moisture or dust ingress; keep it inside a rated enclosure in washdown or dusty environments.