Above that, you derate. Integrated earth-leakage protection is built in, with adjustable sensitivity from 30 mA up to 5 A, covering both Class A and Class AC detection. That saves a separate RCD module and the wiring to it — one less thing to fit on the DIN rail.
Mounts on a backplate — not DIN-rail — so it's a bolt-down install. 108 mm wide, 144 mm high, 80 mm deep, taking 9 module pitches. Front connections top and bottom accept compression lugs or busbars; the 35 mm connection pitch with spreaders (27 mm without) matches standard busbar systems. The grey RAL 7016 colour is the standard industrial finish.