The 3VA1020-4ED36-0AA0: Breaking capacity is the standout figure here: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V. That makes this a high-interrupting-capacity frame for a 20 A rating — useful at the service entrance or in a panel fed by a transformer with high available fault current, where a standard 25 kA or 36 kA MCCB would need upstream fusing or a current-limiting reactor. The part holds its full 20 A rating from 45 °C up through 55 °C ambient, then derates to 19 A at 60 °C and 65 °C, and stays at 19 A at 70 °C. That's a tight derating curve — only 5 % loss at the top of the operating range — which means you can load it near nameplate in a warm panel without oversizing.
Front protection IP40. Rated insulation voltage 800 V.
Lifecycle stage is marked as current production — no phase-out notice on this variant.