The 75.6 kA breaking capacity at 240 V drops to 52.5 kA at 415 V, 32 kA at 440 V, and 11.9 kA at 500/690 V — the interrupting capability shrinks fast above 415 V, so verify the available fault current at your system voltage before committing the BOM line.
Rated 40 A all the way up to 50 °C ambient; above that it starts to taper — 39 A at 55 °C, 38 A at 65 °C, 37 A at 70 °C.
No official successor exists because none is needed.
The breaking capacity at your system voltage is the real gate: at 415 V it's 52.5 kA, which covers most industrial secondary-distribution panels, but at 690 V it's only 11.9 kA. If your available fault current exceeds that, this breaker won't clear the fault safely.