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RJ50 vs. RJ45: What's the Difference?

Edited by Aimie Carlson || By Janet White || Published on February 28, 2024
RJ50 is a 10-pin connector used in specialized applications, whereas RJ45 is an 8-pin connector widely used for Ethernet networking.

Key Differences

RJ50 connectors have 10 pins and are less common, used in specific communication and networking devices. RJ45 connectors, with 8 pins, are ubiquitous in Ethernet networks, connecting computers, routers, and switches.
The physical size of RJ50 is slightly larger due to the additional two pins compared to the RJ45. RJ45 is standardized for Ethernet cabling, making it a staple in both home and office networking setups.
RJ50 is often used in specialized industrial, telecom, or scientific equipment where extra connections are needed. RJ45’s usage is primarily centered around Ethernet networking, supporting fast data transfer speeds.
RJ50 connectors are not as readily available as RJ45s, which are found in virtually any store selling computer networking equipment. RJ45 connectors are also used for connecting VoIP phones, networked printers, and other network devices.
RJ50 is used in niche applications and might require special ordering, while RJ45 is a standard in network cabling, used in both Cat5e and Cat6 cables widely.

Comparison Chart

Number of Pins

10 pins
8 pins

Common Usage

Specialized equipment in telecom, industry
Ethernet networking, common in computers

Physical Size

Slightly larger due to more pins
Standard size for Ethernet cables


Less common, often special order
Widely available in stores

Associated Cable Types

Used with specific, less common cables
Used with Cat5e, Cat6, and other Ethernet cables

RJ50 and RJ45 Definitions


RJ50 is often seen in industrial or scientific applications.
The laboratory equipment connected via an RJ50 to transmit data.


An 8-pin connector predominantly used in Ethernet networking.
The office computers were all connected using RJ45 cables.


Not a standard for common networking, but used where extra connections are necessary.
Their custom security system required an RJ50 for additional features.


RJ45 connectors are widely available and easy to replace.
When their network cable was damaged, replacing the RJ45 connector was straightforward.


Slightly larger than the RJ45 due to extra pins.
The RJ50's size was noticeable when installing the control unit.


Standard connector for Cat5e and Cat6 cables.
When setting up the network, he used RJ45 connectors on the Cat6 cables.


RJ50 connectors are typically found in specific, targeted technology sectors.
For the specialized telecom testing, they used cables with RJ50 connectors.


RJ45 is a common sight in both home and office networking.
Their home network was set up using several RJ45 cables for connectivity.


A connector with 10 pins used in specialized devices.
The telecom system uses an RJ50 connector for advanced functions.


Integral for connecting Internet and network devices.
He connected the router to the modem using an RJ45 cable.


What's the primary use of RJ50?

It's used in specialized telecom and industrial equipment.

Are RJ45 connectors standard in home networks?

Yes, they're commonly used in home and office networks.

Are RJ50 connectors easy to find?

They're less common and might need special ordering.

Can a standard Ethernet cable use an RJ50 connector?

No, Ethernet cables typically use RJ45 connectors.

Is RJ50 compatible with RJ45 ports?

No, they're physically different and not interchangeable.

What devices typically use RJ50?

Specialized devices in telecom, industry, and scientific research.

Can RJ50 be used for Ethernet?

It's not standard for Ethernet, which typically uses RJ45.

Are RJ45 connectors affordable?

Yes, they are widely available and inexpensive.

Are there different grades of RJ45 connectors?

Yes, they vary in quality, suitable for different network speeds.

Is it common to find RJ50 in residential settings?

No, it's more common in specialized industrial settings.

What's the main use of RJ45?

It's primarily used for Ethernet networking.

Can I replace an RJ45 connector myself?

Yes, with the right tools, it's a simple task.

Can RJ45 connectors be used with any cable type?

They're used with Ethernet cables like Cat5e and Cat6.

Is it easy to install an RJ45 connector?

Yes, with basic networking knowledge, it's straightforward.

Are RJ50 and RJ45 connectors visually different?

Yes, the RJ50 is slightly larger due to more pins.

Do RJ50 connectors require special tools for installation?

They might, depending on the specific application.

Is RJ45 compatible with both Cat5e and Cat6 cables?

Yes, RJ45 connectors work with both types.

Can I use an RJ45 connector for a telephone line?

RJ45 is not standard for telephone lines; RJ11 is commonly used.

Do RJ50 connectors come in different types?

They may vary slightly depending on the specific application.

Is soldering required to attach RJ50 connectors?

Usually, they are crimped, not soldered.
About Author
Written by
Janet White
Janet White has been an esteemed writer and blogger for Difference Wiki. Holding a Master's degree in Science and Medical Journalism from the prestigious Boston University, she has consistently demonstrated her expertise and passion for her field. When she's not immersed in her work, Janet relishes her time exercising, delving into a good book, and cherishing moments with friends and family.
Edited by
Aimie Carlson
Aimie Carlson, holding a master's degree in English literature, is a fervent English language enthusiast. She lends her writing talents to Difference Wiki, a prominent website that specializes in comparisons, offering readers insightful analyses that both captivate and inform.

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