What this MCCB carries and where it fits
The Siemens 3VA1163-5EF36-0AB0 is a 3-pole SENTRON molded case circuit breaker rated for 63 A continuous at 40 °C, with a thermal-magnetic TM240 release tuned for line protection. Its interrupting capacity hits 187 kA at 240 V AC — that's the figure that governs fault-clearing duty in low-voltage distribution panels where high available fault current is a given. The 187 kA rating at 240 V means it can safely interrupt a bolted fault up to that level without the arc flashing over or the breaker rupturing, which is the spec a panel designer checks first for switchboard main or feeder positions. De-rate the continuous current as ambient climbs: 62 A at 55 °C, 60 A at 65 °C, 58 A at 70 °C. The breaker's insulation voltage is rated 800 V, so it's comfortable on 480 V or 600 V class systems. Power loss at full load runs 17.3 W max — figure that into enclosure thermal calculations if you're packing multiple breakers in a small can. Physical footprint: 130 mm tall, 76.2 mm wide, 70 mm deep. That's a standard 3-pole MCCB envelope — drops into most panel-mounted or DIN-rail adapter bases without re-drilling the backplate.
Peer fit — 3VA1110-5ED36-0AC0 comparison
If you're cross-referencing against the 3VA1110-5ED36-0AC0: that's a 100 A frame with a different thermal-magnetic curve. The 3VA1163-5EF36-0AB0 is a 63 A frame — same SENTRON platform, same 3-pole layout, same 70 mm depth, so it will physically occupy the same mounting footprint. But the trip unit and continuous rating differ; swapping them without verifying the load's FLA and the coordination study is a mistake. The 3VA1110 frame goes to 100 A; this one tops at 63 A. Use the 3VA1163 where the BOM calls for 63 A line protection and you need the higher interrupting capacity at 240 V.