It carries a TM240 thermal-magnetic overcurrent release, meaning the thermal trip element is fixed for a 40 A frame and the magnetic instantaneous pickup is set at 240 A — that's 6x In, a standard motor-starting tolerance for general distribution.
Breaking capacity is 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 690 V. For a 415 V distribution board, the 75.6 kA figure covers most industrial transformer banks up to around 2 MVA; at 690 V the 11.9 kA rating still handles a substantial fault, but verify it against your transformer impedance and cable length. The IEC 60947-2 rating class is what governs here — this is a utilization category breaker, not a plain isolator.
Above that the curve steps down: 38.4 A at 55 °C, 37.6 A at 60 °C, 36.8 A at 65 °C, 36 A at 70 °C. If your panel internal temp hits 60 °C, you lose 2.4 A — plan for it.
Auxiliaries and releases — what's on board
Comes with 2 auxiliary switches (HQ type) and an undervoltage release (UVR) fitted. The integrated auxiliary trip is order code 3VA9608-0BB24. That's a factory-fitted accessory, not field-installable, so confirm your BOM matches this build.
Panel fit — dimensions and IP
Width 76.2 mm (3-pole footprint), height 130 mm, depth 70 mm. That depth is the body only — add clearance for the arc chute vents and cable bending radius. Front IP40 protection; the terminals are live when the cover is open, so the breaker belongs behind a panel door or in a locked enclosure.