The Siemens 3VA1112-6MH32-0KC0 is a 3-pole IEC frame 160 molded case circuit breaker (MCCB) rated 125 A with a breaking capacity class H — Icu of 70 kA at 415 V AC. That interrupting rating means it can safely clear a fault up to 70 kA without welding or rupturing, which is the spec that governs panel SCCR coordination downstream. It ships with a TM120M thermal-magnetic trip unit set for starter protection (motor branch circuit), adjustable short-circuit pickup Ii = 5–15 × In, and no integral overload relay — the motor's own overload block handles that.
What the integrated accessories mean for your panel
This breaker comes factory-fitted with a shunt trip (STL) rated 220–250 V DC / 208–277 V AC and two HQ auxiliary switches. The shunt trip lets a remote safety relay or PLC cut power independent of the handle — useful for emergency-stop circuits or interlocked guards. The two aux switches provide status feedback (open/closed/tripped) back to the controller or HMI. A nut keeper kit is also included, which simplifies DIN-rail or mounting-plate installation by holding the hardware captive during assembly.