Key Technical Parameters General Data Parameter Value Version Surge protection device, Type 1 / Class I (for main distribution) Type designation VPU I 2 R 280V/12.5KA Order No. 3127580000 Number of poles 2 Design Modular, pluggable protection module on base Mounting type DIN rail TS 35 Protection degree IP20 Housing material Thermoplastic, UL 94 V-0 Dimensions and Weight Parameter Value Width 36 mm (2 modules of 18 mm) Height 90 mm (3.543 inch) Depth 69 mm (2.717 inch) Net weight Approx. 220 g Electrical Ratings (Power Supply) Parameter Value Rated voltage (AC) 230/400 V (TN, TT systems) Max. continuous operating voltage (AC) 280 V (L-N, L-PE) / 255 V (N-PE) Nominal discharge current (8/20 µs) 25 kA Max. discharge current (8/20 µs) 50 kA Impulse current (10/350 µs) 12.5 kA Voltage protection level (Up) ≤ 1.5 kV (L-N) / ≤ 1.5 kV (N-PE) Follow current extinguishing capability 3 kArms Max. backup fuse (short-circuit protection) 315 A gL/gG Short-circuit withstand rating (SCCR) 25 kA Remote Signaling Contact Parameter Value Contact type Floating changeover contact Switching capacity (max.) 250 V AC / 0.5 A Contact material AgNi Connection Data Parameter Value Connection method Screw connection Wire cross-section (solid) 0.5 mm² … 16 mm² (AWG 20 … AWG 6) Wire cross-section (stranded) 0.5 mm² … 25 mm² (AWG 20 … AWG 4) Stripping length 15 mm Tightening torque 2.5 Nm Environmental Data Parameter Value Operating temperature -40 °C … +80 °C Storage temperature -40 °C … +80 °C Relative humidity 5 … 95 % (no condensation) Pollution severity 2 Overvoltage category III Altitude (max.) ≤ 2000 m Compliance & Approvals Parameter Value Standards IEC 61643-11, EN 61643-11 Approvals CE, cULus, VDE