What this MCCB carries and where it fits
The Siemens 3VA2463-6JQ32-0DL0 is a SENTRON molded case circuit breaker (MCCB) rated for line protection, with a full-scale current of 630 A and a three-pole configuration. Its interrupting capacity reaches 242 kA at 240 V and 187 kA at 415 V, which means it can clear high-fault currents in a main distribution board without upstream fuses needing to open — a key selectivity consideration for the site electrical engineer. The breaker includes an undervoltage release (UVR) and a communication function, so it can be integrated into a monitored power distribution scheme. The auxiliary switch complement is 2 auxiliary switches plus 1 trip alarm and 1 electrical alarm switch (HQ type), giving the controls integrator enough dry contacts for remote status and fault annunciation.
Thermal derating and panel integration
The continuous current rating is 630 A at 40 °C ambient, but the panel OEM must account for derating: at 50 °C it drops to 570 A, at 60 °C to 510 A, and at 70 °C to 450 A. If the enclosure runs hot — say a packed MCC with other breakers — the wireman should size the bus and lugs for the derated figure, not the nameplate 630 A. Physical dimensions are 248 mm high, 138 mm wide, 110 mm deep. That 138 mm width is standard for a 630 A frame in the SENTRON 3VA2 family, so it will occupy one 138 mm-wide slot in a Siemens-type distribution panel. The depth of 110 mm leaves clearance for rear-connected busbars or cable ducts.