Rated 40 A continuous at 40 °C, it holds that rating through 50 °C, then derates to 39 A at 55 °C and 37 A at 70 °C — useful to know if this breaker lives in a hot enclosure next to other heat sources. The interrupting ratings are where this breaker earns its keep: 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.
This breaker measures 70 mm deep, 101.6 mm wide, and 130 mm tall — a standard SENTRON 3VA frame size that drops into the same DIN-rail or panel-mount footprint as other 3VA breakers. At 10.8 W maximum power loss, heat dissipation is modest; you won't need forced ventilation in a typical 600 mm x 800 mm enclosure, but it's worth accounting for if you're packing several breakers side by side.
If you need those accessories, you're looking at a different suffix in the 3VA family.