What this MCCB carries and what it means for your panel
The Siemens 3VA1163-4EF32-0BC0 is a 3-pole SENTRON molded case circuit breaker rated for 63 A continuous current (Iu) at 40 °C, with a TM240 thermal-magnetic trip unit. Its interrupting capacity hits 121 kA at 240 V and 75.6 kA at 415 V — that's enough to clear a high-fault utility feed without cascading upstream. The 800 V rated insulation voltage (Ui) gives headroom for 480 V and 600 V class systems. An undervoltage release (UVR) is built in, and two auxiliary switches (HQ type) are integrated for status feedback to a PLC or annunciator.
Integration and mounting
Mounts on a DIN rail or panel-mount plate. The 76.2 mm width (4 module spaces) and 70 mm depth fit standard distribution enclosures. Front IP40 rating means it's protected against tools and small wires — fine for a dry indoor panel, but not washdown. The auxiliary trip module (3VA9608-0BB11) is a separate order; verify it's included or ordered alongside if the BOM calls for shunt-trip capability.