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Updated: 06 Apr 2026

10 Best Serial Adapters Rj45

#1 Best Pick
Hepzest RJ45 Network Cable Serial Cable Rj45 to DB9 and RS232 to USB (2 in 1) CAT5 Ethernet Adapter LAN Console Cable

Hepzest RJ45 Network Cable Serial Cable Rj45 to DB9 and RS232 to USB (2 in 1) CAT5 Ethernet Adapter LAN Console Cable

Brand: Hepzest
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  • 3.The console cable is identical to those shipped with switches, firewalls, routers, wireless devices and more
  • 4.Easy to login system
  • feature:1.It works with both new and old gear. Most users find use of the standard HyperTerminal or some other terminal emulation software such as Putty, to access the IOS through the console port
  • 2.If you're in need of a console cable but don't have a serial port on your computer, this bundle is the perfect solution to your problem Simply attach the USB-to-Serial cable to the Serial-to-RJ45 cable and you're well on your way to being fully connected
  • 5.Compatible with routers, including the 600, 800, 1600, and 1700 series
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#2 Best Value
RELAND SUN DB9 to RJ45 Module Adapter Serial adapter (DB9 male to RJ45)

RELAND SUN DB9 to RJ45 Module Adapter Serial adapter (DB9 male to RJ45)

Brand: Reland Sun
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  • Convert your DB9 male connector into an RJ45 female connector
  • Used for modular RS232 RS422 and RS485 connections
  • Can be used to make customized serial connections
  • DB9 to RJ45 Modular Adapter Female to Female / DB9 to RJ45 Adapter / RJ45 to DB9 Adapter / RJ45 to DB9
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#3 Budget Pick
CTOUUGRS 6ft USB Console Cable, USB to RJ45 Serial Adapter Cable Compatible with Cisco, NETGEAR, Ubiquiti and TP-Link, Essential Console Cable for Routers and Switches

CTOUUGRS 6ft USB Console Cable, USB to RJ45 Serial Adapter Cable Compatible with Cisco, NETGEAR, Ubiquiti and TP-Link, Essential Console Cable for Routers and Switches

Brand: CTOUUGRS
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  • 【High Compatibility & Easy Setup】 This USB to RJ45 console cable connects seamlessly to your laptop's USB port, offering a direct link to the console port of network equipment. It is fully compatible with Cisco, for NETGEAR, for Ubiquiti, for LINKSYS and for TP-Link routers and switches. Perfect for IT professionals, it eliminates the need for bulky RS232 adapters.
  • 【Advanced Chip Technology】 Equipped with a high-performance integrated chip, our console cable ensures superior reliability and stable data transmission. This advanced technology supports various terminal emulators and provides a secure connection for effectively managing network configurations without the risk of data corruption.
  • 【Broad OS Compatibility】 This versatile cable fully supports both 32-bit and 64-bit versions of Windows, for MAC OS, for Linux, and for Android. Whether you are using a modern laptop or a specialized field tablet, our cable ensures you can manage network settings across almost any platform without driver headaches.
  • 【Optimal 6ft Cable Design】 Featuring a USB 2.0 interface (backward compatible with USB 1.1), this 1.8m (6ft) cable provides the perfect length for both server room racks and field troubleshooting. It supports high-speed data transfer up to 960baud, ensuring a responsive and lag-free terminal experience.
  • 【Durable & Secure Construction】 The CTOUUGRS console cable features a robust PVC outer jacket and reinforced connectors designed to withstand the rigors of professional IT use. The secure RJ45 connection prevents accidental signal loss, ensuring uninterrupted configuration and efficient troubleshooting of critical network infrastructure.
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#4 Top Choice
XMSJSIY DB9 RS232 to RJ45 Extender, DB9 9-Pin Serial Port Female&Male to RJ45 CAT5 CAT6 Ethernet LAN Extend Adapter Cable-2pcs (2-Cable)

XMSJSIY DB9 RS232 to RJ45 Extender, DB9 9-Pin Serial Port Female&Male to RJ45 CAT5 CAT6 Ethernet LAN Extend Adapter Cable-2pcs (2-Cable)

Brand: XMSJSIY
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  • DB9 to RJ45 adapter: used for TCP/IP network interface with serial port network function, support serial data and network data bidirectional transparent transmission.Compatible with desktop computer, digital machine tools, PDA, bar code and other standard DB9 serial devices, stable and reliable performance, support maximum distance 66ft.
  • The DB9 RS232 COM signal is transmitted over the network cable,When using this adapter, it is recommended to use within a distance of 1-15 meters.Requires no external power, easy and Convenient to use.
  • High quality alloy transmission port reduce the transmission impedance and interference,environmentally friendly PVC material, super wear-resistant, Integral injection molding. improve data transmission rate and transmission quality.
  • Interface: DB9 Male to RJ45 female; 9pin/8P8C.the adapter run RS232 data over long distances (up to 100m) using UTP Cat 5/ Cat6 cable to bridge the gap.
  • Special Note: Usually this product needs to be used in pairs, specifically divided into: female to female, male to female, male to male three kinds of situations. Can also be used alone.
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#5 Popular Choice
RJ45 to RS232COOSO DB9 9-Pin Serial Port Male to RJ45 Female Cat5 Ethernet LAN Console 4.9Ft

RJ45 to RS232COOSO DB9 9-Pin Serial Port Male to RJ45 Female Cat5 Ethernet LAN Console 4.9Ft

Brand: LFHUKEJI
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  • DB9 RS232 male to RJ45 female cable for TCP/IP network interface with the doual-way conversion, with the serial port network function, support serial data and network data bi-directional transparent transmission
  • Connect the equipment serial port to the RJ45 console port on routers, the cable can help engineer through the PC update the network device settings and device understratum operating
  • Compatible with most routers on the market, such as Cisco and TPlink etc
  • Oxygen-free copper transmission wire, high-speed clear signal transmission
  • Double-shielded standard to ensure that signal transmission without interference
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#6 Top Pick
DB9 RS232 Female Port to RJ45 Female Connector Card DB9 Serial Port Extender to LAN CAT5 CAT6 RJ45 Network Ethernet Cable Adapter

DB9 RS232 Female Port to RJ45 Female Connector Card DB9 Serial Port Extender to LAN CAT5 CAT6 RJ45 Network Ethernet Cable Adapter

Brand: YIOVVOM
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  • DB9 (RS232) male to RJ45 adapter for TCP/IP network interface with the double-way conversion,Transmit signals between your VGA video ports over CATS, CAT5E, and CAT5 CAT6 RJ45 network cables.
  • ABS&Metal Material, Slim profile reduces bending and provides a secure connection.Nick-plated and Oxygen-free copper transmission port on the port minimize crosstalk, suppress noise, and protect against electromagnetic interference (EMI) and radio frequency interference (RFI),Premium adapter engineered with molded strain relief connectors for durability, grip treads for easy plugging and unplugging, and finger-tightened screws for a secure connection.
  • High speed and safety data transfer,Double-shielded standard to ensure that signal transmission without interference,Transmits signals up to 100 FT.
  • Wide application,PC,laptop,Computer,DVR,media center,game consoles etc.Connect your personal media devices to a larger system, such as a monitor, for the ultimate viewing experience.
  • All our product are under strictly tested by us,we promise,quality guarantee and 5-star customer service. If you are not 100% completely satisfied with your adapter, simply let us know and you will be offered a FULL refund or replacement.
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#7 Top Pick
StarTech.com DB9 to RJ45 Modular Adapter - F/F (GC98FF)

StarTech.com DB9 to RJ45 Modular Adapter - F/F (GC98FF)

Brand: StarTech
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  • Convert your DB9 male connector into an RJ45 female connector
  • Used for modular RS232 RS422 and RS485 connections
  • Can be used to make customized serial connections
  • Changer Type DB9 to RJ45
  • RJ-45 Female
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#8 Top Pick
StarTech.com DB9 to RJ45 Modular Adapter - M/F (GC98MF)

StarTech.com DB9 to RJ45 Modular Adapter - M/F (GC98MF)

Brand: StarTech
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  • Brand StarTech, Model GC98MF
  • Product Type: Data Transfer Adapter
  • Adapter Type: RJ-45/Serial, Connector on First End: 1 x 9-pin DB-9 Male, Connector on Second End: 1 x RJ-45 Female
  • Color: Gray, Certifications & Standards: FCC
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#9 Top Pick
RJ45 to RS232COOSO DB9 9-Pin Serial Port Male to RJ45 Female Cat5 Ethernet LAN Console 3.3Ft

RJ45 to RS232COOSO DB9 9-Pin Serial Port Male to RJ45 Female Cat5 Ethernet LAN Console 3.3Ft

Brand: LFHUKEJI
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  • DB9 RS232 male to RJ45 female cable for TCP/IP network interface with the doual-way conversion, with the serial port network function, support serial data and network data bi-directional transparent transmission
  • Connect the equipment serial port to the RJ45 console port on routers
  • Compatible with most routers on the market, such as Cisco and TPlink etc
  • Oxygen-free copper transmission wire, high-speed clear signal transmission
  • Double-shielded standard to ensure that signal transmission without interference
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#10 Top Pick
DTECH 1.8m DB9 to RJ45 Console Cable Cisco Device Management Serial Adapter (6 Feet, Blue)

DTECH 1.8m DB9 to RJ45 Console Cable Cisco Device Management Serial Adapter (6 Feet, Blue)

Brand: DTECH-AU
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  • DB9 to RJ45 console management cable connects your PC laptop to Cisco router, switch, firewall, wireless device and more
  • The cross reference is equivalent to Cisco Part Number 72-3383-01, CAB-CONSOLE-RJ45
  • 1.8 meter short rollover serial adapter allows you to place the device at a convenient distance
  • Ultra thin flat design makes it flexible, helps avoid tangled cords and saves space ; features RJ-45 male connector and 9-pin DB-9 D-sub port
  • Blue RJ45 to DB9 female converter cord is an ideal replacement data cable for reprogramming and updating compatible equipment and devices; can possibly be used to configure other networking devices as well
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