Specifications Parameter Specification Product Series PRD1 (Type 1 SPD Series) Model PRD1 12.5 3P+N Type / Class Type 1 (Class I) – Designed to withstand partial direct lightning current (10/350 µs wave). Configuration 3P+N – Protects all three phases (L1, L2, L3) and the Neutral conductor. Lightning Current Impulse (Iimp) 12.5 kA (10/350 µs wave, per pole) Nominal Discharge Current (In) 20 kA (8/20 µs wave, per pole) Max. Discharge Current (Imax) 40 kA (8/20 µs wave, per pole) Voltage Protection Level (Up) ≤ 2.5 kV (at In, typical for 400V systems) Rated Voltage (Uc) 440V AC (L-L) / 255V AC (L-N) for 400/230V AC systems. Follow Current Interrupting Rating (Ifi) Typically 25 kA rms (for 50Hz systems), ensuring safe shutdown after a surge. Response Time < 100 ns Backup Protection Requires an external fuse or circuit breaker (specific rating per manufacturer's instructions, e.g., 125A gG/gL). Status Indication Visual indicator: Green (OK) / Red (Fault/End of Life). Optional remote alarm contact available. Connection Screw terminals for main conductors. Mounting DIN Rail (35 mm) or direct panel mounting. Width 72 mm (4-module width) Standards IEC/EN 61643-11, CE, RoHS Operating Temperature -40°C to +80°C