THIS efi TITAN ELECTRONIC SURGE PROTECTION DEVICE 20kA WAS REMOVED FROM A ELECTRONIC CABINET THAT WAS NEVER USED OR POWERED UP.These Surge Protective Devices (SPD) provide surge protection for electrical and automation cabinets. They can be mounted on standard 35 mm rail near the incoming power source to isolate the cabinet from the outside environment. This product is ideal for manufacturers and electrical installers requiring designed-in power protection.