The Schneider Electric PRD 40 is a Type 1+2 Combined Surge Protective Device (SPD) with a 3P+N (3-phase + neutral) configuration and an enhanced maximum discharge current (Imax) of 40 kA per phase. Designed for high-risk exposure environments, it provides the highest level of primary surge protection at the service entrance against direct or indirect lightning strikes and severe switching transients in low-voltage AC power systems.
Parameter Specification
Product Range / Series PRD (Combined Type 1+2 SPD)
Type / Class Type 1+2 (Class I + II) Combined SPD
Configuration 3P+N (3 phases + neutral)
Rated Network Voltage 230/400V AC, 50/60 Hz
Max. Continuous Operating Voltage (Uc) 255/440V AC (L-N / L-L)
Lightning Impulse Current (Iimp) - Type 1 25 kA (10/350 µs wave) per pole
Maximum Discharge Current (Imax) - Type 2 40 kA (8/20 µs wave) per pole
Voltage Protection Level (Up) ≤ 2.5 kV (typical at In)
Nominal Discharge Current (In) 20 kA (8/20 µs)
Status Indication Visual indicator (green: OK, red: faulty)
Remote Signaling Optional changeover contact (alarm)
Backup Protection Integrated thermal disconnector; requires an external high-breaking capacity backup fuse (e.g., 160A gL/gG or NH fuse) as per installation manual.
Connection Robust screw terminals for large conductors (typically up to 70-95 mm²).
Mounting DIN Rail (35mm) or direct mounting
Standards IEC 61643-11, EN 61643-11
Operating Temperature -40°C to +80°C
Protection Degree (IP) IP20 (when mounted in an enclosure)