... response <25ns. Can be replaced for the module. Product DescriptionNS1-(D, C, B) 5 series surge protection ... abnormal, it also could be replaced for the module when has operating voltage.Application Scope ... is applicable for D,C,B grade lightening-proof, installed on the joint of LPZOA ... the product series, model and quantity in detail. For example: 5NS1-40/4-385, 8 pieces.Model and Meaning NS1-(D ...