That dual-standard rating covers most domestic and light commercial service-entrance requirements across Europe and markets adopting IEC 60947-2. The 4-pole, 4-modular-width (72 mm) footprint occupies four DIN-rail positions — standard for a 3P+N MCB in a SENTRON distribution board. Rated for overvoltage category III (fixed installation) and pollution degree 2, it's built for permanent connection inside a sealed enclosure.
The maximum operating voltage across phases is 440 V AC — useful if the supply runs high at the transformer secondary. Per-pole power loss is 2.6 W in hot operating state at rated current; for a 4-pole breaker that's about 10.4 W total heat to dissipate inside the enclosure. In a crowded DIN rail with multiple breakers, that heat adds up — derating may be needed if ambient exceeds 40 °C, though the part itself is rated for ambient up to 75 °C and down to -40 °C.
The 72 mm width (4 MW) matches the standard SENTRON modular grid.