The Siemens 3VA1163-1AA36-0KA0 is a SENTRON 3VA1 switch disconnector in an MCCB (molded case circuit breaker) mechanical design — same frame, same DIN-rail footprint, but built purely for isolation and switching, not overcurrent protection. Rated continuous current Iu is 63 A, with no overload or short-circuit protection onboard. That makes it the right choice for a manual disconnect point where upstream protection already exists, or for safe isolation during maintenance on a 3-pole load circuit. The integrated shunt trip release (STL) operates on 220–250 V DC or 208–277 V AC, letting you trip the disconnector remotely via a control signal — useful for emergency-stop chains or remote load shedding where you need to break the circuit without walking to the panel. No undervoltage release is fitted, so the disconnector holds in regardless of control voltage loss; only a deliberate shunt-trip pulse opens it.
Three-pole, 70 mm deep, 76.2 mm wide, 130 mm tall — the same compact 3VA1 frame dimensions as the equivalent breaker versions. Front terminal connection for the main circuit, clamp-type terminals. The 3VA1 frame accepts an optional motor drive, so this disconnector can be automated for remote switching without losing the manual disconnect function. No auxiliary contacts are fitted as standard; if you need status feedback, plan for an add-on auxiliary contact block.
Voltage and endurance
Mechanical endurance is 15,000 operating cycles. Power loss at rated current maxes at 38 W.