The 5SY7425-7: Breaking capacity is 15 kA per EN 60898 and 25 kA per IEC 60947-2 at 400 V AC; on DC circuits it interrupts 15 kA at 72 V max. That 25 kA figure under 60947-2 is the one that matters for industrial panel coordination — it tells you the MCB can clear a fault without upstream gear having to trip, as long as the available fault current at the panel doesn't exceed that. For a UL 1077 listing (supplementary protector duty), the interrupting rating is 5 kA. That's typical for North American branch-circuit applications where the upstream breaker already provides primary fault clearance. The housing is IP20 with conductors connected — fine inside a closed panel, not for wet or dusty environments without an enclosure. Mounting position is any, and it snaps onto DIN rail via the quick-assembly system. Pollution degree 3 means it's rated for conductive pollution in industrial atmospheres.
At 76 mm deep, 72 mm wide (4 modular width units), and 90 mm tall, it fits standard DIN-rail enclosures. The 70 mm installation depth gives you a bit of clearance behind the busbar. Combined top and bottom terminals simplify daisy-chaining — no need to re-terminate the supply side when adding downstream breakers. Neutral conductor is not switched internally (4-pole means all four poles are live/phase, no switched neutral). If you need a switched neutral, this isn't the variant — look at the 4-pole with neutral switching in the same family. The sealable option (yes) lets a panel builder lock the toggle position after commissioning, which keeps unauthorized hands off the trip setting.