Rated 10 kA interrupting capacity per DIN EN60898-1 and 20 kA per IEC 60947-2 at 400 V AC, it handles fault currents common in 400 V three-phase industrial networks.
For a 400 V AC circuit, the 10 kA breaking capacity per EN 60898-1 covers the vast majority of industrial service-entrance and sub-distribution fault levels; the 20 kA rating per IEC 60947-2 applies when the breaker is certified to the higher industrial standard, giving a safety margin for high-fault installations like transformer secondaries or large motor control centers. DC rating: 60 V operating voltage, 72 V max, with 15 kA interrupting capacity per IEC 60947-2. That makes it usable on 48 V DC control buses or 60 V battery strings, but not for 110 V DC traction circuits. The 50/60 Hz AC rating is single-phase and multi-phase at 440 V max — covers 400 V line-to-line systems with headroom. Temperature derating is specified: max 95% RH at 55 °C, dropping to 35% RH at 75 °C. In a sealed, non-ventilated panel near a heat source, the upper ambient limit of 75 °C is the absolute ceiling — expect nuisance tripping above it. The -40 °C minimum covers cold storage or unheated shelters.
Integration & Compliance
The 54 mm width (3 MW) is standard for 3-pole MCBs; it shares the same footprint as other SENTRON 5SY-series breakers, so a panel laid out for a 5SY4304-7CV or 5SY4310-7CV accepts this unit without rewiring or rail repositioning. The product is explicitly designated for railway applications (EN 50155 environment) and mechanical engineering / industry duty. Sealable (padlockable) handle for lockout/tagout compliance. Rated IP20 with connected conductors — not for wet or dusty locations without an enclosure.