February 29, 2024

The Ultimate Guide to RJ45 Pass Through Connectors: A Beginners Handbook

Let’s delve into the world of RJ45 connectors. These connectors play a crucial role in networking, especially when it comes to wired internet connections. Here’s a comprehensive guide to help you understand RJ45 connectors:

What is an RJ45 Connector?

Let’s break it down:

Registered Jack (RJ): The term “Registered Jack” denotes a standardized interface for connecting telecommunications equipment. It’s a universal designation for various connectors used in telephone and data communication.

45: The number 45 corresponds to the pin arrangement within the RJ45 connector. Specifically, it signifies an 8P8C (8 position, 8 contact) configuration. This means there are 8 positions where wires can be inserted, and each position has 8 contacts for electrical connections.

These 8 positions accommodate the twisted pairs of wires used for Ethernet networking. The RJ45 connector ensures proper alignment and connectivity, allowing data signals to flow seamlessly between devices.

In summary, the RJ45 connector is named after its pin configuration, which includes 8 positions and 8 contacts, making it essential for wired networking.


RJ45 connectors are commonly found at either end of an Ethernet (wired internet) connection.

They resemble the familiar telephone plugs and jacks but are slightly larger.

The term “RJ45 connector” refers to both male RJ45 plugs (found on Ethernet cables) and female RJ45 sockets (embedded in devices like modems, routers, or servers).

Technical Details:

RJ45 connectors are based on an 8P8C (8 position, 8 contact) configuration.

They include an additional tab for mechanical keying, preventing mating with visually similar but electrically incompatible sockets.

Proper functionality requires correct wiring following either the T568A or T568B standard, each with its own color-coded convention.


Pass-Through RJ45 Connectors:

These connectors allow network cable wires to pass out of the connector body.

The pass-through design offers several advantages. First and foremost, it simplifies the termination process. With ITBEBE RJ45 Cat6 pass-through connectors, you can easily insert the wires through the connector, eliminating the need to trim and arrange them meticulously. This feature saves time and reduces the chances of errors during installation.

Additionally, the pass-through design allows for custom cable lengths. You can create Ethernet cables tailored to your specific requirements without wasting excess cable. Whether you need a short patch cable or a longer one, the pass-through connector accommodates your needs efficiently.

Furthermore, pass-through connectors are universally compatible. They work seamlessly with various models of RJ45 crimping tools and support both stranded and solid cables. This versatility ensures that you can use them across different networking setups without compatibility concerns.

In summary, pass-through connectors streamlines cable termination, provides flexibility in cable length, and ensures compatibility—a winning combination for network installers and enthusiasts alike!


Compared to standard RJ45 connectors, pass-through connectors are:

  • Easier to align the Ethernet cable wires before termination.
  • Ideal for novices or DIYers due to their user-friendly design 123.
  • Remember, RJ45 connectors are the unsung heroes behind our internet connectivity, ensuring seamless communication between devices. Whether you’re setting up a home network or configuring a server room, understanding these connectors is essential!


Different types of RJ45 Connectors:

Let’s explore the different types of RJ45 connectors, also known as Ethernet connectors, and their characteristics:









Maximum Speed

10 Mbps

100 Mbps

1000 Mbps

10 Gbps

10 Gbps

10 Gbps

40 Gbps





55m/180 ft for 10 GBPS


50m/164ft for 10 Gbps

30m/98ft for 25-40 Gbps



: Originally, Cat3 was used primarily for telephone systems.


: It was also employed in 10BASE-T networks, which were early Ethernet networks.

: Cat5 is commonly used for older hardware that requires outdated connections.


: It is also used for carrying other signals such as telephone and video.

: They are commonly found in homes, offices, schools, and data centers.


: Cat5e is an excellent choice for connecting computers, routers, switches, and other network devices.

: Cat6 is commonly used for Ethernet networking in both residential and commercial settings.

: Cat6 is commonly used for Ethernet networking in both residential and commercial settings where highspeed is required in larger distances.

: Cat7 is commonly used in data centers, server rooms, and large enterprise networks.


: It’s suitable for environments where high bandwidth and low latency are critical.

: Cat8 is commonly used in data centers, server rooms, and enterprise networks.


: It’s suitable for applications requiring high bandwidth, such as video streaming, cloud computing, and virtualization.

: Cat8 cables are also used for industrial automation and IoT deployments.