Breaking capacity is the headline here: 187 kA at 240 V AC, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at both 500 V and 690 V.
The 3VA1112-5EF32-0KC0 measures 130 mm high, 76.2 mm wide, and 70 mm deep — a standard 3-pole MCCB footprint that drops into most SENTRON mounting plates and DIN-rail adapters without panel modification. The current derating curve starts above 55 °C — at 55 °C it still carries 122 A, at 70 °C it derates to 114 A. For a 125 A nominal load in a 50 °C panel, no derating is needed.
Auxiliary Release and Switching
The shunt trip (STL) design allows remote tripping via a control signal — typical for emergency-stop circuits or supervisory shutdown. The 2 auxiliary switches (HQ version) provide normally-open and normally-closed contacts for status monitoring without additional interposing relays.