The Siemens 3VA1112-5EF32-0HA0 is a 3-pole IEC frame 160 circuit breaker from the 3VA1 series, rated at 125 A with a 55 kA breaking capacity at 415 V (class M). This is the line-protection variant with a TM240 thermal-magnetic trip unit, adjustable overload protection from 88 A to 125 A, and short-circuit pickup set at 5 to 10 times In. It includes a shunt trip (STL) rated for 12–30 V DC or 24 V AC at 50/60 Hz, plus a nut keeper kit for the terminal hardware.
Mounts on DIN rail in a standard distribution or motor-control center panel. The 55 kA interrupting rating at 415 V gives headroom for high-fault installations where upstream coordination demands full selectivity. The shunt trip allows remote tripping from a safety circuit or emergency-stop chain — wire it to a 24 V DC or 24 V AC control signal.