function
RJ45 plug, also known as RJ45 Modular Plug, is used for the connection of data cables, that is, for the connection between equipment and patch panel modules. The RJ45 crystal plug has the functions of preventing loosening, plugging and unplugging, self-locking, etc. Function.
The RJ45 plug is a standard connector in copper cable wiring. It and the socket (RJ45 module) form a complete connector unit. The connector composed of these two components is connected between the wires to achieve electrical continuity of the wires. It is also a component of the finished jumper of integrated wiring technology. RJ45 crystal heads are usually connected to both ends of the twisted pair cable. In standard integrated wiring design and installation, this accessory product is usually not listed separately, which means that users are not advised to complete the connection between the twisted pair and the RJ45 plug by themselves.
RJ45 plugs are divided into two types: unshielded and masked. The periphery of the masked RJ45 plug is covered with a masking cladding, and its physical appearance is no different from that of the unshielded plug. There is also an industrial masked RJ45 plug specially designed for factory environments, which can be used in conjunction with the mask module.
功用
RJ45插頭又稱為RJ45水晶頭（RJ45 Modular Plug），用於資料電纜的聯接，義即用於設備、配線架模組之間的連接，RJ45水晶頭具有防止鬆動、插拔、自鎖等功能。
RJ45插頭是銅纜佈線中的標準連接器，它和插座（RJ45模組）共同組成一個完整的連接器單元。這兩種元件組成的連接器連接於導線之間，以實現導線的電氣連續性。它也是綜合佈線技術成品跳線裡的一個組成部分，RJ45水晶頭通常接在對絞電纜的兩端。在規範的綜合佈線設計安裝中，這個配件產品通常不單獨列出，也就是不主張用戶自己完成雙絞線與RJ45插頭的連接工作。
RJ45插頭分為非遮罩和遮罩兩種。遮罩RJ45插頭週邊用遮罩包層覆蓋，其實物外形與非遮罩的插頭沒有區別。還有一種專為工廠環境特殊設計的工業用的遮罩RJ45插頭，與遮罩模組搭配使用.
