It combines ground-fault and overcurrent protection in one DIN-rail module, saving panel space over separate RCCB + MCB pairs.
Temperature derating and real-world current
Above that, derate linearly: 30.8 A at 40 °C, 30.2 A at 45 °C, 29.5 A at 50 °C, 29.2 A at 55 °C, 28.2 A at 60 °C, and 26.9 A at 70 °C. If the panel ambient runs at 50 °C, the effective continuous current is 29.5 A — size the load accordingly. The insulation voltage (Ui) is rated 500 V, and surge voltage resistance is 4 000 V.
The 72 mm width equals 4 modular units (18 mm each). Supply can enter from either top or bottom. The design is instantaneous (no intentional time delay), so it trips without delay on fault.