RJ (Registered jack) connectors are crimp connectors widely used in telecoms and data applications.
4 pole 4 contact connectors, more commonly known as RJ10, (and sometimes RJ9/RJ22), are often used on telephone handset cables connecting to the telephone dock. This connector is sometimes referred to as RJ11 (6 pole 4 contact), but it is physically smaller.
6 pole 6 contact connectors, more commonly known as RJ12 are often used for system telephones. This connector is the same physical size as an RJ11 (6 pole 4 contact), so could be used for RJ11 applications such as telephone connections, ADSL, modem cables etc. when wired appropriately.
8 pole 8 contact connectors, more commonly known as RJ45, are often used for Data Network applications.
RJ10 and RJ12 are designed for use with flat cable with in-line cores. RJ45 are available for both flat or round cable (e.g. Category 5). Fully shielded RJ45 are available for more sensitive applications. RJ45-Cat6 and RJ45-Cat6/6A are three part connectors, that include a cable management bar: RJ45-Cat6/6A/XL is a two part connector. Note that strain relief boots should be used in order to obtain Cat6 and Cat6A performance.
These connectors are fitted using special crimp tools - see Crimp tools.
For strain relief boots see RJ45-STRAIN-RELIEF-BOOTS.
Note (1): Outer diameter including insulation.
Housing material: Polycarbonate UL 94 V-0. Contact material: RJ10 and RJ12 types, 0.38 micron gold over 2.54 micron nickel plated phosphor bronze: RJ45 types, 1.27 micron gold over 2.54 micron nickel plated phosphor bronze. Mating cycles: 200+