What this MCB covers
Rated 415 VAC multi-phase (440 VAC max) and 250 VAC single-phase, with a 72 VDC maximum for DC-side applications. The 7.5 kA breaking capacity per EN 60898 is the standard you spec for a residential or light-commercial panelboard — adequate for most utility-transformer fault currents, but not the 10 kA or 25 kA you'd need closer to a large substation. IP20 with conductors connected — expected for a panelboard device, not for wet locations.
The 4-MWU footprint (72 mm) occupies four 18 mm module positions — plan your rail fill accordingly. Sealable (padlockable) handle for lockout/tagout.