It is rated 800 A at 40 °C (derated to 722 A at 70 °C) and carries a breaking capacity of 187 kA at 240 V, 121 kA at 415 V, and 52.5 kA at 690 V — so it handles high-fault utility feeds and large motor branch circuits without cascading upstream.
The 3VA1580-5EF32-0BL0 measures 320 mm high, 210 mm wide, and 120 mm deep — a 3-pole frame sized for standard switchboard or enclosure mounting.
Thermal derating and power loss
The breaker holds full 800 A rating up to 50 °C; above that it derates linearly to 780 A at 55 °C and 722 A at 70 °C. Maximum power loss is 242.5 W — relevant for enclosure thermal calculations when the panel runs near the upper ambient limit.