Surge arrester with filter SFL-Protector 6X power strip, type 3 according to EN 61643-11, with monitoring device and disconnection device. Increased safety thanks to mix-up-proof Y-protective circuit. Power strip to protect the power supply of electronic devices from transient overvoltages and high-frequency interference voltages. For use in the lightning protection zone concept at interfaces 1 - 2 and higher.