The Siemens 3VA1116-1AA32-0AD0 is a SENTRON switch disconnector built in an MCCB (molded case circuit breaker) physical design — same 3-pole frame, same 70 mm depth and 76.2 mm width as the 3VA circuit breakers, but with no overload or short-circuit protection. That means it lives in the same panel footprint and busbar system as the protected breakers, but its job is isolation, not protection. The front face carries an IP40 protection class — fine for a dry indoor panel, not for washdown.
Integration and auxiliary contacts
This switch disconnector comes with three auxiliary switches (HQ type) already integrated — 3 CO contacts. That is a lot of status feedback for a disconnect: you can wire separate signals for open/closed position, interlock confirmation, or a panel-indication lamp without adding an external auxiliary block. No undervoltage release, no voltage trigger, no communication module — it is a straightforward, manually operated disconnect with auxiliary signaling. Mechanical endurance is rated at 15 000 operating cycles — enough for a maintenance disconnect that sees daily use over years, not a switching device for frequent motor starts.