The Siemens 3VA1163-5ED32-0HH0 is a SENTRON 3VA1 molded case circuit breaker (MCCB) rated for 63 A continuous current across a 40 °C to 50 °C ambient range — no derating needed at those temperatures. It's a 3-pole unit built for line protection, with a shunt trip release (STL) and a 2+1 auxiliary/trip-alarm switch block already fitted. The interrupting rating hits 187 kA at 240 V AC, which drops to 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at 500/690 V — so it handles high-fault utility feeds and transformer secondaries without needing an upstream current-limiting fuse.
Breaking capacity and selectivity
At 240 V this breaker clears 187 kA — that's a very high interrupting rating for a 63 A frame, which means it can be used close to the service entrance or on a high-capacity transformer secondary and still maintain selective coordination with downstream feeders. The 17 kA at 500/690 V still covers most industrial motor branch circuits; if your system runs at 480 V you're looking at something between the 440 V and 500 V figures, so the margin is solid.
Panel fit and integration
The breaker measures 130 mm high, 76.2 mm wide, and 70 mm deep — a compact 3-pole footprint that fits standard 3VA1 mounting plates and DIN-rail adapters. The auxiliary switch block (2 N/O + N/C) and the shunt trip release are pre-installed, so you don't need to open the cover for field installation of accessories. Max power dissipation is 17.3 W; plan for that heat load in a sealed enclosure.