What the ratings mean for fit
The 3VM1163-3EE46-0AA2: The 25 kA Icu at 415 V is the maximum short-circuit current the breaker can safely interrupt under IEC 60947-2. For a 63 A feeder protecting a motor control center or distribution panel, this rating provides adequate fault-clearing capability for most industrial installations without needing an upstream current-limiting fuse. The adjustable Ir (44–63 A) lets you fine-tune the overload setting to match the continuous load current, which is useful when the actual load is below the breaker's 63 A In rating. The fixed Ii = 10 x In (630 A magnetic pickup) means the instantaneous trip is not adjustable — verify that this setting coordinates with downstream branch breakers, especially if you have long cable runs or high-inrush loads.
Where it fits in a panel
The 3VM1 frame 160 mounts on a DIN rail or can be screw-fixed to a backplate in a standard distribution or motor control center enclosure. The 4-pole configuration with an unprotected neutral conductor suits TN or TT systems where the neutral is not switched or protected. Terminal connections accept copper or aluminum conductors; torque values are marked on the breaker face. The compact frame width (140 mm for 4-pole) saves panel space compared to older frame sizes.