The Siemens 3VA1163-4EF36-0JC0 is a 3-pole IEC molded-case circuit breaker from the 3VA1 series, frame size 160, with a 63 A rated current (In) and a breaking capacity class S delivering Icu = 36 kA at 415 V AC. That 36 kA interrupting rating at 415 V means it can safely clear a fault up to that level without upstream devices needing to intervene — a key selectivity consideration when coordinating with a main breaker or transformer secondary. The TM240 thermal-magnetic trip unit gives adjustable overload protection (Ir = 44…63 A) and fixed short-circuit pickup (Ii = 5…10 × In), so you set the Ir to match the cable or load ampacity, not the breaker frame.
Protection and accessories
This breaker ships with a factory-fitted shunt trip (STL) rated 110–127 V DC / AC 50/60 Hz — a remote-trip coil for emergency-stop or supervisory circuits. Two auxiliary switches (HQ) provide status feedback (open/closed/tripped) to a PLC or annunciator panel. The clamp connection terminals accept copper or aluminum conductors without lugs, which saves panel space and installation time compared to bolted connections.