What this 4-pole MCCB carries — and what it means on the van
The Siemens 3VA1063-3ED42-0CH0 is a SENTRON molded case circuit breaker, 4-pole, rated 63 A continuous at 40 °C ambient, and it holds that full 63 A all the way up to 50 °C without derating — at 55 °C it's still 62 A, at 65 °C it's 60 A, so you've got headroom in a warm panel. The interrupting ratings are what decide fit: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 7.5 kA at 500 V and 690 V. That tells you it's built for high-fault commercial and industrial mains distribution, not just a branch feeder.
Sizing and selectivity — the numbers that matter for coordination
This MCCB carries a line protection design, meaning it's intended for cable and busbar protection, not motor starting duty. The 4-pole construction with undervoltage release and a built-in trip alarm switch plus two auxiliary switches means you can wire it into a safety circuit that drops the breaker on loss of control voltage — common on emergency-stop chains and undervoltage coil monitoring. The 800 V rated insulation voltage covers 690 V systems with margin.
Panel fit — dimensions and what they mean for a retrofit
The 3VA1063-3ED42-0CH0 measures 130 mm height, 101.6 mm width, and 70 mm depth. That 70 mm depth is shallow enough for most 200 mm deep enclosures, and the 101.6 mm width (4 inches) is the standard footprint for a 4-pole SENTRON 3VA frame — it drops into the same mounting hole pattern as other 3VA 4-pole breakers of this frame size. No rewiring for a different footprint if you're swapping within the 3VA family, but verify the lug kit matches your cable size.