The 4-pole design handles three-phase plus neutral, and the 630 A frame means it feeds a main distribution board or a large motor control center — not a branch circuit. The ETU850 gives you adjustable long-time, short-time, instantaneous, and ground-fault protection, plus a communication function for remote monitoring via the breaker's own bus. Breaking capacity is the headline: 330 kA at 240 V, 242 kA at 415 V, and still 187 kA at 500 V. The continuous current derates with ambient temperature: 630 A at 40 °C, 570 A at 50 °C, 510 A at 60 °C, and 450 A at 70 °C.
Dimensions: 248 mm high, 184 mm wide, 110 mm deep. IP40 on the front.