It carries 220 kA interrupting capacity at 240 V, 154 kA at 415 V, 121 kA at 440 V, and 17 kA at 690 V — those numbers tell you it handles high-fault-current industrial feeds, not just branch circuits. The 3-pole design with 2 auxiliary switches (HQ version) and an integrated shunt trip (STL) means it can be remotely tripped via a separate control signal, which is useful for emergency-stop or interlock circuits in a panel.
At 55 °C it drops to 38.4 A, at 60 °C to 37.6 A, at 65 °C to 36.8 A, and at 70 °C to 36 A. If your panel ambient sits at 50 °C or below, you get full 40 A continuous. The 15 000 mechanical endurance cycles (latching) tell you it's built for a moderate number of operations, not a switching duty cycle like a contactor.