Breaking capacity is 187 kA at 240 V, 121 kA at 415 V, and 53 kA at 690 V — that SCCR headroom means it clears high-fault scenarios without cascading upstream, critical for transformer secondaries or bus-tie applications. The ETU350 electronic trip unit gives you adjustable long-time pickup (Ir) from 0.5 to 1.0 × In (500–1 000 A), short-time delay (tsd) from 0.04 to 0.4 s, and instantaneous pickup (Ii) up to 10 000 A — so you can shape the curve for selectivity with downstream breakers. Current rating holds at 1 000 A up to 55 °C ambient; above that, derate to 955 A at 60 °C, 885 A at 65 °C, and 815 A at 70 °C. That thermal curve is the real-world limit for a hot panel — size your load accordingly.
Dimensions are 320 mm high × 210 mm wide × 120 mm deep (12.6 × 8.3 × 4.7 in).
Mounts in a standard panel cutout; the 210 mm width fits common MCCB footprints. Spring-cage or screw terminals accept cable sizes typical for 1 000 A class — verify lug kit compatibility with your bus bars.