Lightning protection Level 3, 50kA 10/350μs. Fully compliant to BSEN62305, BS61643-11 & BS7671. Combined arrester Type 1+2+3 can handle direct lightning strikes and protect sensitive electronic equipment. Suitable for all installation types (TT, TNC-S & TN-S). Low let through voltage <1.3kV. Visual indication of status. Pluggable replacement modules. Remote changeover contacts can be linked to BMS, buzzer, light etc. Din rail mountable. Minimum backup fuse / MCB 63A. Recommended cable size 25mm². Manufactured in Europe.