RJ50 has more pins than RJ45, RJ50 has 10 pins and RJ45 has 8 pins. RJ45 is used in Ethernet connections and local area networks. The network cable categories are usually Cat5, Cat5e, Cat6, etc.; the transmission speed of RJ45 can reach 10/100Mbps, 1000Mbps, etc. RJ50 is used in some specific industrial equipment, serial port connections or data acquisition equipment. For example, some POS (point of sale terminals) use RJ50 for serial port connections.
Note: The opening width of RJ50 is the same as that of RJ45, but due to the different number of pins, the two cannot be used interchangeably. Forcible insertion may damage the interface or device.
Summary table
| Features | RJ45 | RJ50 |
| Number of pins | 8 pins | 10 pins |
| Main purposes |
Ethernet connection(c omputer, router, switch,etc) |
industrial application, automation equipment, control system,etc |
| Dimensions | 11.68mm x 8.7mm | The plug is slightly longer than the RJ45 and is usually larger in size |
| Cable Type | Twisted pair (Cat5, Cat5e, Cat6, etc.) | Cables with more pairs for industrial applications |
| Connection | Point-to-point network connections (such as a computer to a router) | Connections in dedicated equipment or industrial systems |
| Typical Applications | Local Area Network (LAN), Telephone System | Automation control, sensors, industrial network equipment, etc. |
