Switch disconnector for isolation duty
The Siemens 3VA1163-1AA36-0AH0 is a SENTRON 3VA1 IEC frame 160 switch disconnector rated for 63 A continuous current without overload or short-circuit protection — it is a pure isolation and switching device, not a circuit breaker. Three poles, front terminal clamp connections, and a 70 mm depth footprint that matches the rest of the 3VA1 family.
DC side is rated to 500 V. The 2 kA short-time withstand at 1 s and 0.5 s confirms it can sit upstream of a branch circuit without self-destructing during a fault — but it is not a breaker, so the downstream protection must clear the fault.
Auxiliary contacts and integration
That is three CO contacts total, wired through the front terminal arrangement. The trip alarm switch signals the open state — useful for remote status monitoring on a panel door or PLC input.
Dimensions: 130 mm height, 76.2 mm width, 70 mm depth — the 3VA1 family shares this footprint, so a panel cutout or DIN-rail layout designed for a 3VA1 MCCB accepts this switch disconnector without re-drilling. The 38 W heat dissipation at full load must be factored into the enclosure thermal budget — for a sealed panel with no fan, that is roughly 130 BTU/h to reject.