630 A continuous, 440 kA interrupting — the panel-feeder MCCB
The Siemens SENTRON 3VA1463-7EF32-0AE0 is a 3-pole molded case circuit breaker rated 630 A continuous at 40 °C, with a TM240 thermal-magnetic release for line protection in main distribution panels. Its interrupting capacity hits 440 kA at 240 V and 242 kA at 415 V, so it handles high-fault utility feeds without cascading upstream gear. The 138 x 248 x 110 mm frame bolts into standard switchboard mounting — plan the gland plate and bus bar clearance accordingly.
Derating and thermal budget
The 630 A rating holds through 50 °C. Above that, the continuous current linearly derates to 618 A at 55 °C, 607 A at 60 °C, 595 A at 65 °C, and 583 A at 70 °C. Maximum power loss is 192.9 W — factor that into enclosure ventilation if the panel runs warm. Operating range is -25 °C to 70 °C; storage from -40 °C to 80 °C.