The Siemens SENTRON 3VM1163-4EE42-0AA0 is a 4-pole molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current of 63 A at 40 °C through 50 °C, with a slight thermal derating above that — 62 A at 55 °C, 61 A at 60 °C, 60 A at 65 °C, and 58 A at 70 °C. The interrupting capacity hits 121 kA at 240 V AC, 76 kA at 415 V, 53 kA at 440 V, and 12 kA at 500 V — numbers that matter for high-fault service entrances or large motor branch circuits where the available fault current is substantial. The TM220 thermal-magnetic release gives you an adjustable long-time pickup up to 630 A, so this breaker can be tuned to the load without swapping out the whole unit.
What the ratings mean for the panel
A 63 A frame with 121 kA at 240 V means this breaker can sit upstream of a transformer or a large motor control center and still clear a bolted fault without needing a current-limiting fuse ahead of it. The 690 V rated insulation voltage (Ui) covers most industrial 480/277 V and 600 V systems with headroom. IP40 on the front keeps finger-sized objects out but isn't sealed against washdown — it's fine inside a dry enclosure, not out in the weather.