JL5系列圓形電連接器的接觸件為切口收槽及斜線切割兩種形式，為保證觸件的可靠性，插孔的外層套有自然導向的不銹鋼護套，使產品具有接觸電阻小，使用壽命長，接觸性可靠等優點，產品主要技術指標符合鐵道部標準TB/T2716-1996。該系列電連接器插頭與插座的連接方式為卡口連接，連接速度快，使用方便，產品被廣泛使用于鐵路機車中電氣及電子設備中的連接。根據用戶要求，插頭，插座既可裝針，也可裝孔。

JL5 serles clrcular connectors are made according to ministry of railway standard TB/T2716-1996.the connector’s socket is covered with guided stainless sleeve and allows the connector to have the advantages of low contact reslstance，long endurance，etc.the connection type between the plug and the receptacle is bayonet coupling with quick mating and easy use.this connector is wldely used for the connection of electrical equipment of rail train.the plug or the receptacle may be mounted with both pins and sockets.