PV DC BUD-40/2 Surge Protection Device was designed and manufactured ,complying the PV standard EN50539-11, It widely used in PV DC combiner box, inverter, controller and PV DC cabinet. Rated voltage 600V DC, Maximum discharge current 40KA,High Energy Varistor, high effective for lightning protection. Suitable For Use in All Photovoltaic Systems Prewired Modular Complete Unit Consisting of A Base Part and Plug-in Protection Modules Plug-in Protection Module, Easily Installation and Maintenance High Energy Varistor, Response Time Less Than 25 Nanosecond Optional Remote Signalling Contact(FM) for Monitoring Device (Floating Changeover Contact) Din Rail Mounting TH35-7.5/DIN35 Comply with :EN 50539-11