SS40 Single-Pole Class 2 surge arrester (non-pluggable) for installation in the LPZ 0B - 1 Lightning Protection Zone in accordance with lEC 61643-1 Tested to SABS/IEC 61643-1 Degree of protection: IP20 Rated Voltage: 275VAC Maximum continuous operating voltage: 350VDC High energy zinc oxide varistor Fault disconnect device Fault indication Fast response time