What this MCCB carries — and what it means for your panel
The Siemens 3VA2463-5JQ32-0AD0 is a SENTRON molded case circuit breaker (MCCB) rated for line protection, with a continuous current of 630 A at 40 °C and a trip range adjustable from 945 A to 5 670 A — meaning you can set the instantaneous pickup to roughly 1.5x to 9x the frame rating, which gives flexibility for motor or transformer inrush without sacrificing fault coordination. Breaking capacity is 187 kA at 240 V, 121 kA at 415/440 V, 75.6 kA at 500 V, and 9 kA at 690 V — the 415 V figure is the one that matters for most European industrial panels; it tells you this breaker can clear a bolted fault at the main distribution board without upstream fuses needing to blow. Current derates with ambient temperature: 630 A at 40 °C, 600 A at 45 °C, 570 A at 50 °C, 540 A at 55 °C, 510 A at 60 °C, 480 A at 65 °C, 450 A at 70 °C. If your panel runs hot — say 55 °C inside the enclosure — you lose 90 A of headroom; size your load accordingly.
Integration and mounting
Three-pole design, 138 mm wide, 248 mm tall, 110 mm deep — fits standard MCCB panel cutouts and busbar spacing for 630 A frames. The depth (110 mm) is the dimension that matters for shallow backpanels; check your enclosure depth against that figure before committing the BOM. Supplied with three auxiliary switches (HQ type) as standard, and no undervoltage or shunt release fitted — if your safety circuit requires a UVR, you'll need to add one; the basic switch variant is 3VA2463-5JQ32-0AA0. Communication function is built in (Ethernet or fieldbus via the SENTRON communication module) — useful for energy monitoring and remote trip indication without extra wiring.