It breaks faults up to 3 kA per both EN 60898 and IEC 60947-2 at 400 V AC, 50 Hz — the dual standard rating means it's accepted in residential/commercial (EN) and industrial (IEC) installations without a separate coordination study. The neutral pole is switched, so you get full isolation on all conductors in a single 3-module-width package.
At 63 A, it's sized for a subfeed or a large final circuit, not a branch lighting circuit.
Three width units on a DIN rail, 55 mm installation depth. The 3P+N configuration with switched neutral occupies the same footprint as a 4-pole breaker but with the neutral pole switched — common in European distribution boards where the neutral is opened for isolation but not protected.