The 3VA1080-4ED42-0DC0: The 80 A rating holds across the 40–50 °C band, then derates to 78 A at 55 °C, 77 A at 60 °C, 75 A at 65 °C, and 74 A at 70 °C — so in a warm panel you lose about 6 A by the time ambient hits 70 °C. The 121 kA at 240 V is the headline breaking figure; at 415 V it still clears 75.6 kA, at 440 V it manages 52.5 kA, and at 500 V or 690 V it holds at 11.9 kA.
Built-in undervoltage release and auxiliary switches
No communication function, ground-fault monitoring, or trip indicator is included on this variant. The basic switch supplied is order code 3VA10804ED420AA0.
Dimensions are 130 mm height, 101.6 mm width, and 70 mm depth. The 101.6 mm width (4 inches) is standard for a 4-pole MCCB in the SENTRON 3VA frame, so it drops into existing busbar or lug layouts without re-drilling.