The Siemens 3VA1163-1AA32-0AE0 is a SENTRON 3VA1 switch disconnector in an IEC frame 160, rated for 63 A continuous current without overload or short-circuit protection — it's a straight disconnect and isolate device, not a breaker. The front terminal accepts busbar connection, and it ships with four HQ auxiliary switches (4 CO contacts) installed.
The 690 V AC rating covers standard 400 V three-phase systems with headroom; the 500 V DC rating matters for battery or DC bus isolation. The 2 kA limited short-time withstand (1 s and 0.5 s) means this switch can pass a fault current up to 2 kA for that duration without welding or damage — but it relies on an upstream protective device to clear the fault. That 2 kA figure governs coordination: the upstream breaker or fuse must have a let-through energy low enough to keep the switch within its withstand rating.
The 76.2 mm width is a standard 4-module DIN-rail pitch (18 mm per module) — it occupies four 18 mm slots on the rail. Busbar connection on the front terminals keeps wiring tidy in a distribution block layout.