RJ45 is a wiring system in the information socket (i.e., communication lead) connector connector by the plug (connector, crystal head) and socket (module) composed of a plug with 8 grooves and 8 contacts.RJ is the abbreviation of Registered Jack, meaning "registered socket". Computer network RJ45 is the standard 8-bit modular interface is commonly known. 

The RJ45 plug is the standard connector for copper cabling, and together with the socket (RJ45 module) it forms a complete connector unit. These two components make up the connector that connects between the wires to achieve electrical continuity of the wires. It is also an integral part of the finished jumper cable for integrated wiring technology. RJ45 crystal heads are usually connected to the ends of twisted-pair cables. RJ45 plugs are used for termination of data cables to achieve the connection and change of equipment, patch panel modules.

Number of poles:2P
Rated current:1.5A 
Voltage:150V 
Application:PCB
Insulation Resistance:>1000MΩ(25C);>100 MΩ after wet heat test. 
Voltage strength: between reed and reed: DC1000V or effective AC700V. 
Reed to ground: DC1500V or AC1000V.
Contact resistance: plug gold plate and socket metal pin 
Contact points between: not more than 20mΩ 
 
Mechanical and physical properties
RJ45 plug and RJ45 socket insertion and removal times: not less than 750 times. 
Insertion force: not more than 20N
Pull-out force: not less than 20N.
Operating temperature: normal operation in the range of -10 ° C - +60 ° C. 
RJ45 socket body injection moulding material flame retardant standard.
Thermoplastic flame retardant standard: UL-94V-0 level (UL-94 combustion test method, V-O for the highest combustion level); PBT
Gold wire: phosphor bronze

Number of poles:2P
Rated current:1.5A 
Voltage:150V 
Application:PCB
Insulation Resistance:>1000MΩ(25°C). 
More than 100 MΩ after wet heat test. 
Voltage strength: between reed and reed: DC1000V or effective AC700V; between reed and ground: DC1500V or effective AC1000V.
Contact resistance: plug gold plate and socket metal pin contact point: not more than 20mΩ; 
 
Mechanical and physical properties
RJ45 plug and RJ45 socket insertion and extraction times: not less than 750 times 
Insertion force: not more than 20N.
Pull-out force: not less than 20N.
Operating temperature: -10 ° C - +60 ° C range of normal operation. 
RJ45 socket body injection moulding material flame retardant standard.
Thermoplastic flame retardant standard: UL-94V-0 level (UL-94 combustion test method, V-O for the highest combustion level); PBT
Gold wire: phosphor bronze

Number of poles:2P
Rated current:1.5A 
Voltage:150V 
Application:PCB
Insulation Resistance:>1000MΩ(25° C);>100 MΩ after wet heat test. 
Compressive strength: reed and reed: DC1000V or effective AC700V; reed to ground: DC1500V or effective AC1000V, contact resistance: plug gold plate and socket metal pin contact point: not more than 20mΩ; 
 
Mechanical and physical properties
RJ45 plug and RJ45 socket insertion and extraction times: not less than 750 times. 
Insertion force: not more than 20N.
Pull-out force: not less than 20N.
Operating temperature: normal operation in the range of -10 ° C to +60 ° C. 
RJ45 socket body injection moulding material flame retardant standard: thermoplastic flame retardant standard: UL-94V-0 level (UL-94 combustion test method, V-0 for the highest combustion level); PBT
Gold wire: phosphor bronze

Number of poles:2P
Rated current:1.5A 
Voltage:150V 
Application:PCB
Insulation Resistance:>1000MΩ(25° C);>100 MΩ after wet heat test. 
Compressive strength: reed and reed: DC1000V or effective AC700V; reed to ground: DC1500V or effective AC1000V, contact resistance: plug gold plate and socket metal pin contact point: not more than 20mΩ; 
 
Mechanical and physical properties
RJ45 plug and RJ45 socket insertion and extraction times: not less than 750 times. 
Insertion force: not more than 20N.
Pull-out force: not less than 20N.
Operating temperature: normal operation in the range of -10 ° C to +60 ° C. 
RJ45 socket body injection moulding material flame retardant standard: thermoplastic flame retardant standard: UL-94V-0 level (UL-94 combustion test method, V-0 for the highest combustion level); PBT
Gold wire: phosphor bronze