Its 4-pole, D-curve, 3 A thermal-magnetic trip unit is sized for loads with high inrush — motor starters, small transformers, or control circuit feeds where the magnetic trip at 12 x In ±20 % avoids nuisance tripping on startup. Breaking capacity is 20 kA Icu at 240 V AC phase-to-phase, 10 kA at 415 V, and 6 kA at 440 V, all per EN/IEC 60947-2. The rated service breaking capacity (Ics) is 75 % of Icu at each voltage level — 15 kA at 240 V, 7.5 kA at 415 V, 4.5 kA at 440 V — meaning the breaker can be reclosed after clearing a fault at those levels without immediate replacement. Rated operational voltage is 440 V AC, with a 50/60 Hz network frequency. The 3 A rating is at 50 °C ambient, so derating applies above that; the operating temperature range is -30 to 70 °C.
Tightening torque for the power circuit is 2 N·m. IP20 rated for the enclosure face. Earth-leakage protection requires a separate block — not integrated.