This Acti9 PRD1 25r product is a modular surge arrester protecting 1P electrical installations against direct lightning strikes. The Imax maximum discharge current is 40kA .The In nominal discharge current is 25kA. The Type 1 surge arrester is recommended for electrical installations in the service sector and industrial buildings protected by a lightning conductor. It also provides type 2 protection and protect the electrical installation by finely clipping the lightning wave overvoltage. The surge arresters with “r” indication have remote transfer of the information “Cartridge to be replaced”. The Uc maximum continuous operating voltage in common mode (between phase and earth) is 350VAC. The Up Voltage protection level in common mode (between phase and earth) is 1.5kV. The Ue rated operational voltage is 230VAC +/- 10%. The product colour is anthracite grey (RAL7016).The dimensions are (W) 36mm x (H) 90mm x (D) 71mm. The weight is 334g. The degree of protection is IP20 and IP40 in modular enclosure. The operating temperature is -25°C to 60°C. The storage temperature is -40°C to 80°C. This product is compliant with EN 61643-11 and IEC 61643-11 standards.