The Siemens 3VA1163-5MH36-0AE0 is a 3-pole IEC frame 160 molded-case circuit breaker (MCCB) rated at 63 A continuous current, with a breaking capacity class M delivering Icu=55 kA at 415 V AC. This is a starter-protection variant (TM120M release) configured for motor branch circuits: it provides short-circuit protection with an adjustable instantaneous trip Ii=5...15 x In, but omits the overload protection element — meaning it relies on a separate overload relay upstream or downstream for thermal motor protection. The breaker includes four auxiliary switches (HQ type) for status feedback to a PLC or safety circuit.
Clamp-type terminals accept copper or aluminium conductors up to the frame's rated cross-section. The 3VA1 frame mounts on a DIN rail or screws directly to a backplate; the 160 mm frame height and 3-pole width (approx. 105 mm) fit standard distribution panels. Four built-in auxiliary switches eliminate the need for a separate auxiliary contact block in many applications, saving DIN rail space and reducing wiring.