630 A MCCB with 187 kA interrupting capacity
The Siemens SENTRON 3VA1463-5EF42-0AA0 is a 4-pole molded case circuit breaker rated for 630 A continuous at 40 °C, with a TM240 thermal-magnetic trip unit designed for line protection. Its interrupting capacity hits 187 kA at 240 V and 121 kA at 415 V, which means it can clear high-fault currents in a main distribution panel without cascading upstream — critical for selectivity in a multi-level installation.
Current derating and thermal management
At 40 °C, 45 °C, and 50 °C the breaker holds 630 A without derating. Above that, it drops to 618 A at 55 °C, 607 A at 60 °C, 595 A at 65 °C, and 583 A at 70 °C. The maximum power loss is 192.9 W — a figure to check against enclosure ventilation, especially when ganging multiple breakers in a compact panel.
Physical footprint and panel fit
Dimensions are 184 mm wide, 248 mm tall, and 110 mm deep — a standard SENTRON 3VA frame size for this current class. Front protection is IP40, so it's suited for a dry indoor enclosure but not washdown areas.