Siemens FS140 Whole House Surge Protection Device Rated for 140,000 Amps Ul 1449 listed, type 2, surge protective device (spd) Get 3 stage commercial grade notification for your commercial or residential applications. Response Time : less than 1 nanosecond Compatible with any brand of load center and breakers Enclosure rated for type 4 outdoor, and can also be installed inside the load center 10 year product and connected equipment warranty