What this MCCB is and what it does
The 3VA1063-2ED42-0AA0: Breaking capacity is 52.5 kA at 240 V, 32 kA at 415 V, and 7.5 kA at 690 V — so it handles high fault currents on the low-voltage side and still clears on 690 V systems. The 800 V rated insulation voltage means it's suitable for 480/277 V and 600 V panels with margin.
Mounting and integration
Mounts on a DIN rail or directly to a backplate. Dimensions are 130 mm tall, 101.6 mm wide, 70 mm deep — the 4-pole width is the key fit check for existing panel layouts. IP40 on the front means it's protected against tools and wires >1 mm, but not against water ingress, so keep it inside an enclosure rated for the environment. No undervoltage release, no shunt trip, no communication module — this is a basic thermal-magnetic breaker for straightforward line protection. Power loss is 17.3 W max at rated load, which matters for thermal calculations inside a sealed panel.