The Siemens 3VA1163-1AA36-0HC0 is a SENTRON switch disconnector in the 3VA1 IEC frame 160 family. It's a 3-pole, 63 A rated device with no overload or short-circuit protection — it's a disconnect, not a circuit breaker. That means it's for isolation and switching under load, not for protecting downstream wiring. The shunt trip release (STL) operates on 12-30 V DC or 24 V AC 50/60 Hz, and it ships with 2 HQ auxiliary switches built in. That's a solid thermal budget for a panel that runs warm.
At 70 mm deep, 76.2 mm wide, and 130 mm tall, this unit fits the standard 3VA1 frame footprint. Front terminal connection for the main circuit — clamp-type terminals, so you're landing wires on the face, not the back.
The 38 W max power loss is the heat it dumps into the enclosure; factor that into your panel cooling calc if you're stacking several of these.