The Siemens 3VA1163-1AA32-0AB0 is a SENTRON switch disconnector built in an MCCB (molded case circuit breaker) form factor, but it is not a circuit breaker — it provides no overload or short-circuit protection. That flat thermal curve means you can install it in a warm cabinet or near a heat source and still count on the full 63 A.
Rated operational voltage is 690 V AC and 500 V DC, with an insulation voltage of 800 V — so it handles 480 V and 600 V class systems with headroom. Connection is via front busbar terminals, which simplifies bus-stack assembly in a distribution panel. Maximum power loss is 38 W, a figure to consider for thermal management inside a sealed enclosure.
The 3VA1 frame measures 130 mm high, 76.2 mm wide, and 70 mm deep — a compact 3-pole footprint that fits standard MCCB panel cutouts. The front busbar connection and included nut keeper kit simplify busbar assembly without loose hardware. The optional motor drive (listed as a product extension) allows remote switching if needed.