Breaking capacity and voltage
The interrupting ratings climb steeply with voltage: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, then drops to 3.7 kA at 690 V. At 415 V — common for industrial three-phase distribution in Europe and Asia — the 121 kA figure gives you serious fault-current headroom for a 40 A frame. The 690 V rating is low enough that you'd check selectivity carefully if that's your system voltage.
Thermal derating and ambient
That's unusual for an MCCB; most frames start dropping current above 40 °C. Dimensions are 181 mm high × 140 mm wide × 86 mm deep (7.13 × 5.51 × 3.39 inches), which fits the standard SENTRON 3VA mounting footprint.