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