The surge protection device SA1F34A275R combines the performance of SPD type 1 and 2 into a single product. 
It protects against direct and indirect lightning strikes as well as induced overvoltage conditions. It can be installed in areas with a high risk of direct lightning strikes, inside main distribution boards or nearby sub-distribution boards.
This surge protection device is immune to temporary overvoltage (TOV) and stop the flow of current after the trip. The presence of the integrated fuse does not require any backup protection.
The “no leakage current” technology allows it to be installed upstream of energy meters as it does not influence the measurement of consumed energy.