630 A continuous, 440 kA interrupting — the ratings that matter
The Siemens 3VA2463-8HN32-0AA0 is a 3-pole SENTRON molded case circuit breaker rated for 630 A continuous at 40 °C, with an ETU350 electronic trip unit handling line-protection duty. Its interrupting capacity hits 440 kA at 240 V and 330 kA at 415 V — numbers that tell you this breaker is sized for the main feeder, not a branch circuit. The 630 A frame carries the full plant load through a single device; the 440 kA SCCR means it can sit upstream of a fault without needing a current-limiting fuse ahead of it.
Thermal derating and panel fit
The 630 A rating holds at 40 °C ambient; step up to 50 °C and it derates to 593 A, at 60 °C to 557 A, and at 70 °C to 520 A. If your panel runs hot — near a transformer or in a non-climate-controlled enclosure — size the load side for the derated figure, not the nameplate. The breaker measures 110 mm deep by 138 mm wide by 248 mm tall, which fits the standard SENTRON 3VA fixed-mount footprint. Front face carries IP40 protection, so it's fine in a typical IP54 or IP55 enclosure as long as the gland plate seals the cable entries.
Lifecycle and sourcing posture
This order code is listed as current production. The ETU350 trip unit is an electronic design, not the older thermal-magnetic platform.