What the ratings mean for your panel
The Siemens SENTRON 3VA2063-7HM32-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated for 63 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling, which simplifies panel layout in warm enclosures or near other heat sources. Its interrupting capacity hits 330 kA at 240 V and 242 kA at 415 V, so it can sit upstream of a high-fault transformer or a large motor bank without needing a current-limiting fuse ahead of it — the breaker itself clears the fault. The ETU330 electronic trip unit gives adjustable long-time pickup and delay (tr min 0.5 s, tr max 17 s), letting you coordinate selectivity with downstream feeders rather than relying on a fixed thermal curve.
Panel fit and dimensions
At 105 mm wide, 181 mm tall, and 86 mm deep (–), the 3VA2063-7HM32-0AA0 fits the standard SENTRON 3VA2 mounting footprint — no special sub-panel or adapter plate needed for a retrofit into an existing 3VA2 cutout. Front-face protection is IP40, adequate for a closed panel; the breaker accepts optional motor-drive extensions for remote tripping or auto-reset schemes.