... Can be replaced for the module. Product DescriptionNS1-(D, C, B) 5 series surge protection device (in short: SPD, alias: ... voltage.Application Scope and Installation PositionNS1-(D, C, B)5 surge protective device is applicable for D,C ... installed in household distribution boards, computer equipment, frequency conversion equipment, operating room, custody, electronic equipment etc. and in the socket box ...