The TM240 thermal-magnetic trip unit handles overload and short-circuit in one package; no external relay needed.
Interrupting capacity and thermal curve
Interrupting ratings drop as voltage rises: 154 kA at 415 V, 121 kA at 440 V, and 17 kA at 500 V and 690 V. That 17 kA floor at 690 V still covers most industrial motor branch circuits. The thermal derating is mild — 50 A holds from 40 °C to 50 °C, then steps down to 45 A at 70 °C.
Dimensions are 130 mm high, 76.2 mm wide, 70 mm deep — standard MCCB footprint for a 3-pole frame. The shunt trip release (STL) allows remote tripping from an emergency-stop or safety circuit. The basic switch is order code 3VA11506EF320AA0.