Power Line SPD - DIN-RAIL IEC TYPE 1+2

STP T12 is the series of combined Type 1+2/Class I+II surge protective devices for discharging lightning currents and protecting against voltage surges, in accordance with EN/IEC 61643-11.

Suitable as the first step of protection in incoming power supply panels and areas with exposure to the atmosphere, where installations are usually provided with an external lightning protection system. 

More information on Electrical Power website.