The Siemens SENTRON 5SY4304-7 is a 3-pole miniature circuit breaker with a C tripping characteristic, rated 10 kA interrupting capacity per EN 60898 and 35 kA per IEC 60947-2 at 400 V AC. It also carries a 5 kA rating under UL 1077 and a 15 kA DC rating per IEC 60947-2 at 60 V DC. This dual-standard rating means it can serve in IEC-based distribution panels and, with the UL 1077 listing, in North American supplementary protection applications — a useful overlap for multi-region machine builds.
The 10 kA rating at 400 V AC (EN 60898) is the standard domestic/commercial fault level; the 35 kA rating (IEC 60947-2) covers industrial panels where the prospective short-circuit current is higher. The 15 kA DC rating at 60 V DC means it can also protect DC bus circuits in drives or solar combiners, provided the voltage stays under 72 V DC. The 3-module width (54 mm,) and 76 mm depth fit standard DIN-rail enclosures; the quick-assembly fastening and any-position mounting simplify panel layout.