The 3VA1140-6EF32-0BC0: Breaking capacity is the headline here: 220 kA at 240 V, 154 kA at 415 V, 121 kA at 440 V, and 17 kA at both 500 V and 690 V. That's serious fault-current headroom for a 40 A frame — it'll ride through a high-energy bolted fault without venting or cascading upstream.
Current rating holds at 40 A from 40 °C through 50 °C, then steps down: 39 A at 55–60 °C, 38 A at 65 °C, 37 A at 70 °C.
Auxiliary release and switching
No ground-fault monitoring or communication module on this variant. Maximum power loss is 13.3 W — manageable for a DIN-rail or panel-mount install, but if you're packing multiple breakers in a sealed enclosure, sum the losses and check the thermal rise.