Technical Data Parameter Value / Description Manufacturer Part Number 1SFL617001R7011 Product Line ABB OVR Surge Protective Device Type / Class Type 1 + 2 Combined Surge Arrester (Tested according to IEC/EN 61643-11) Rated Voltage (Un) 230/400V (for 50/60Hz three-phase networks with neutral) Maximum Continuous Operating Voltage (Uc) 320 V AC (Line-Neutral) Protection Level (Up) @ In ≤ 1.8 kV (at rated discharge current In). This is the voltage that appears across the protected terminals, defining the clamping performance. Nominal Discharge Current (In) 8/20 µs 20 kA (per pole). The current waveform through which the device is tested for standard duty. Impulse Current (Iimp) 10/350 µs (Type 1) 12.5 kA (per pole). This is the critical parameter for withstanding partial direct lightning currents. Maximum Discharge Current (Imax) 8/20 µs 40 kA (per pole). The maximum single surge current the device can handle once. Response Time < 25 ns Backup Fuse Recommendation Typically 125A gL/gG (Must be verified with local regulations and the specific installation manual). Number of Poles / Connection 3P + N (Three Phase conductors + Neutral). Technology Varistor-based (Metal Oxide Varistor - MOV). Status Indicator Visual window (Green = OK, Red = Fault/End-of-Life). Thermal Protection Integrated thermal disconnector. Mounting DIN-rail mounted (35 mm standard rail). Width 4 modules (72 mm on a standard DIN rail). Standards & Certifications IEC/EN 61643-11, CE marked.