MCCB for high-fault panel builds
The Siemens SENTRON 3VM1463-5GE42-0AA0 is a 4-pole molded case circuit breaker rated 630 A continuous at 40 °C, with a TM220 thermal-magnetic overcurrent release. It carries 187 kA interrupting capacity at 240 V AC and 121 kA at 415 V AC — numbers that tell you it's built for high-fault, low-voltage distribution where you need solid selectivity coordination downstream. The 690 V AC rated operational voltage and 800 V rated insulation voltage mean it's comfortable on 400/480 V lineups with headroom to spare. Width 184 mm, height 248 mm, depth 110 mm.
Ratings that govern the real decision
The 630 A rating holds flat from 40 °C through 50 °C — no derating in that band — then drops to 618 A at 55 °C, 607 A at 60 °C, and 595 A at 65 °C. If your panel ambient runs above 50 °C, that's the curve you need to size against, not the catalog number. The TM220 release gives you a thermal pickup adjustment range and fixed magnetic trip; it's a workhorse for feeder protection, not a fancy electronic trip unit with ground-fault or comms options — this unit has no ground-fault monitoring, no communication function, and no undervoltage release fitted. Power loss hits 193 W maximum at rated load. That's heat that stays inside the enclosure; factor it into your thermal budget if you're stacking multiple breakers in a sealed cabinet. The IP40 front protection keeps dust out of the mechanism — fine for a clean indoor panel, but not for washdown environments.