What the ratings mean for fit
The 3VA1063-3ED32-0JH0: The 63 A rating at 40 °C is the thermal continuous current — the breaker carries that load without tripping in a 40 °C ambient. Above that, derate: at 55 °C it handles 62 A, at 65 °C it drops to 60 A, and at 70 °C it's 58 A. The 75.6 kA interrupting rating at 240 V is the maximum fault current it can safely clear at that voltage; at 415 V that drops to 52.5 kA, at 440 V to 32 kA, and at 500 V or 690 V to 7.5 kA. The rated insulation voltage is 800 V, so the breaker's internal creepage and clearance are sized for 800 V-class systems even though the interrupting ratings are lower at higher voltages.
Panel integration and dimensions
The breaker measures 130 mm high, 76.2 mm wide, and 70 mm deep — a standard MCCB footprint for a 3-pole 63 A frame. It mounts on a DIN rail or bolts directly into a panel. The auxiliary switch configuration includes two auxiliary switches plus one trip alarm switch (HQ), and a shunt trip (STL) is built in for remote tripping. No undervoltage release or ground-fault monitoring on this variant.