Device 타입 = Surge Protector Range = SENTRON 시리즈 = 5SD Mounting Style = Clip-On The Siemens 5SD series is a Plug-in part type 2 N-PE Requirement class B.It has 1-pole and is used for combi-arrester 5SD744 and surge arrester 5SD742.Plug in parts type 2 Can be used for lightning arrester 5SD741