The interrupting capacity hits 75.6 kA at 240 V, 52.5 kA at 415 V, and 32 kA at 440 V — numbers that tell you this breaker can handle high-fault panels without cascading upstream. The auxiliary contact version is 2 HQ switches, and the integrated shunt trip (STL) allows remote tripping — useful for emergency-stop or supervisory control loops.
At 55 °C it drops to 38.4 A, and at 70 °C it's 36 A. That's a shallow derating curve, so if your panel ambient sits at 50 °C or below, you get the full 40 A. The rated insulation voltage is 800 V, and the interrupting ratings at 690 V (7.5 kA) confirm it's usable on 690 V systems, though the high-fault performance is at the lower voltages. Dimensions are 70 mm deep, 76.2 mm wide, 130 mm tall — a standard 3-pole MCCB footprint that fits most DIN-rail or panel-mount enclosures.