At 415 V it's still 121 kA, at 440 V it drops to 75.6 kA, and at 500/690 V it holds at 17 kA. For a 20 A frame, those are high-interrupt values; you're buying this for the SCCR, not the continuous current. Power loss maxes at 12 W, which matters for enclosure heat rise in a packed panel. Dimensions are 130 mm tall, 76.2 mm wide, 70 mm deep — standard 3-pole MCCB footprint for DIN-rail or screw-mount backpan.
The 3VA frame shares the same width and depth as the 3VA1 family, so if you're swapping a 3VA1110-5EF32-0AM0 (also 3-pole, 20 A, but with a different release or accessory set), the footprint is identical — no rewiring the bus bars or re-drilling the panel.