Specifications Specification Details / Typical Values Product Type Surge Protective Device (SPD) / Surge Arrester Model / Series iST 65 4P (Schneider Electric) Device Application AC electrical distribution / surge protection Poles (Connections) 4‑pole (3 Phases + Neutral) Surge Protection Class Type 2 SPD (for distribution boards) Maximum Discharge Current (Imax) 65 kA per mode (8/20 µs) maximum surge current capability Nominal Discharge Current (In) Typically 20 kA (8/20 µs) per mode (varies by cartridge) Rated Operational Voltage (Ue) 230/400 V AC (±10 %) at 50/60 Hz Maximum Continuous Operating Voltage (Uc) 260–350 V AC depending on mode and earthing system Voltage Protection Level (Up) Typically ≤1.5 kV (common and differential mode) Surge Protection Technology MOV (Metal Oxide Varistor) + internal arc discharge elements Earthing System Compatibility Suitable for TN‑C, TN‑S, TT system types Standards Compliance IEC 61643‑11 / EN 61643‑11 surge protection standards Remote Signalling Some variants include remote “replace module” contact (optional) Installation Fixed mounting in distribution panelboard Protection Modes L–N, L–PE, N–PE protection paths Typical Application Incoming panel surge protection, feeder protection in industrial/commercial distribution