630 A continuous, 187 kA interrupting — the mainline breaker for high-fault panels
The Siemens SENTRON 3VM1463-5GD42-0AA0 is a 4-pole molded case circuit breaker rated for 630 A continuous at 40 °C, with a TM210 thermal-magnetic overcurrent release.
Thermal derating and ambient — what the 630 A rating actually means in your panel
At 55 °C it derates to 618 A, at 60 °C to 607 A, and at 65 °C to 595 A. At the 70 °C maximum operating ambient it still carries 583 A. That's a shallow derating curve — useful when the breaker sits near other heat sources in a crowded lineup.
The 3VM1463-5GD42-0AA0 measures 248 mm high, 184 mm wide, and 110 mm deep.
Interrupting performance across common voltages
Rated short-circuit breaking capacity: 187 kA at 240 V AC, 121 kA at 415 V and 440 V, and 76 kA at 500 V.