What the ratings mean for fit
The 3VA1110-5EF36-0KH0 is a 3-pole IEC frame 160 molded case circuit breaker with a 55 kA interrupting capacity at 415 V — class M breaking capacity, which means it can clear fault currents up to that level on a 415 VAC line without upstream devices needing to coordinate. That Icu rating is the ultimate short-circuit capacity; for selectivity studies, the Ics (service breaking capacity) is typically 75-100% of Icu on this series, so it holds up under repeated faults. The TM240 thermal-magnetic trip unit gives an In of 100 A, with overload protection adjustable from 70 A to 100 A (Ir). Short-circuit magnetic pickup (Ii) is set at 5 to 10 times In — so between 500 A and 1000 A depending on the dial position. That range suits motor branch circuits or distribution feeders where you need to ride through inrush without nuisance tripping. This breaker ships with a shunt trip (STL) rated for 220-250 V DC or 208-277 V AC, plus two auxiliary switches (HQ) and one trip alarm switch (HQ). The shunt trip lets you remotely open the breaker via a control signal — typical for emergency-stop circuits or remote load shedding. Aux switches provide status feedback to a PLC or panel lamp.
Where it goes in the panel
Frame 160 breakers mount on a DIN rail or directly to a backplate via the base. The clamp-type terminals accept copper or aluminum conductors — strip length and torque per the nameplate. In a 600 mm wide enclosure, plan for side-to-side clearance for the shunt trip wiring and auxiliary switch cable ducts; the HQ blocks add about 18 mm to the breaker width per side.