630 A MCCB with 242 kA interrupting rating
The Siemens SENTRON 3VA2463-6JP32-0HH0 is a 3-pole molded case circuit breaker rated for 630 A continuous current at 40 °C. Its interrupting capacity hits 242 kA at 240 V, 187 kA at 415 V, and 40 kA at 690 V — numbers that matter when you're coordinating upstream of a transformer or tying into a high-fault utility feed. The ETU550 electronic trip unit gives you adjustable long-time, short-time, instantaneous, and ground-fault protection curves, which means you can shape selectivity without swapping the breaker. The 242 kA at 240 V figure tells you this breaker can safely interrupt a fault current up to that level without welding contacts or venting plasma into the enclosure. That's the SCCR your panel label needs to match. At 690 V the rating drops to 40 kA, still enough for most 690 V motor circuits, but check your available fault current before committing the BOM line.
Thermal derating and enclosure fit
The continuous current rating is 630 A at 40 °C ambient inside the enclosure. Above that, it derates linearly: 600 A at 45 °C, 570 A at 50 °C, down to 450 A at 70 °C. If your panel runs hot — say 50 °C near the top of a sealed NEMA 12 — you're losing 60 A of headroom. Size the breaker for the actual ambient, not the catalogue number. Physical footprint is 248 mm high, 138 mm wide, 110 mm deep. That's a standard 3-pole MCCB form factor; it drops into the SENTRON mounting base without adapter plates. The 162 W maximum power loss at full load needs to be factored into your enclosure thermal calculation — that's heat that has to exit through the gland plate or a vent.
Auxiliary contacts and communication
Comes with 2 auxiliary switches plus 1 trip alarm switch (HQ type), and a shunt trip (STL) for remote opening via a control signal. The integrated auxiliary trip module is order code 3VA9688-0BL30. Communication function is present — this variant supports the SENTRON communication-capable platform, so you can pull status and trip data over the bus. No undervoltage release, no phase failure detection, no ground-fault monitoring module on this version.