Specifications Parameter Specification Product Series Acti 9 iPRU Model Designation iPRU 20 4P 20KA Type / Class Type 2 / Class II (Main distribution level protection, installed at the origin of the installation or sub-distribution boards) Number of Poles/Protection Modes 4 Poles (typically configured as L1, L2, L3, N-PE or 3+1 mode) Nominal Discharge Current (In) 20 kA (8/20 µs wave, per mode) Maximal Discharge Current (Imax) 40 kA (8/20 µs wave, per mode) Voltage Protection Level (Up) ≤ 1.5 kV (at In, typical for 230/400V systems) Rated Voltage (Uc) 275V AC (L-N) / 440V AC (L-L) for 230/400V TN-S/TN-C-S/TT systems Network Configuration Suitable for TN-S, TN-C-S, TT systems Response Time < 25 ns Backup Protection External fuse or circuit breaker required (e.g., 32A to 63A gG/gL type, as per manufacturer's instructions). Status Indicators Green (OK) / Red (End of Life) visual window. Optional remote signaling contact available. Connection Screw terminals, 35 mm DIN rail mounting Mounting DIN Rail (35 mm) Width 72 mm (4-module width) Standards IEC/EN 61643-11, CE, RoHS Operating Temperature -40°C to +80°C