SABRENT USB 2.0 to Serial DB9 RS232 Male Adapter Cable
4.4Editor score
Fixed hex standoffs for secure connection
Prolific PL2303GS Chipset included
Bus powered with no external adapter
In this guide
Finding the right D Sub to USB Adapter is essential for connecting legacy serial devices to modern computers. These adapters bridge the gap between older hardware and current USB ports ensuring seamless data communication for industrial and professional applications.
We evaluated ten top-rated adapters based on chipset reliability cable durability and driver compatibility. Our comparison focuses on real-world performance with serial devices like PLCs barcode scanners and legacy industrial equipment to help you choose the most reliable solution.
Each pick highlights key features pros and cons to guide your decision. Prices and availability change frequently so check the linked product pages for the latest offers and stock status before making your final purchase decision today.
Top 3 Picks for Best D Sub to USB Adapter
USB to RS232 USB Serial Adapter with FTDI Chipset
4.6Editor score
Gold plated connectors for durability
Up to 1Mbps data transfer rate
Wide OS support including Linux and Mac
TRIPP LITE Keyspan High-Speed USB to Serial Adapter
4.6Editor score
Up to 230 Kbps transfer speed
LED status light for data monitoring
Three year limited warranty included
Top 10 Best D Sub to USB Adapter in 2026 Compared
The following table provides a side by side comparison of all ten adapters highlighting key specifications and features to help you quickly identify the best fit for your specific serial communication needs.
ProductsSpecificationsEditor scorePrice
Editor's Choice
USB to RS232 FTDI Adapter
Chipset FTDI FT232
Cable Length 6 Feet
Max Baud 1Mbps
Warranty Customer Service Online
4.6Editor score
Editor's Choice
IOGEAR USB to PDA/Serial Adapter
Chipset Proprietary
Cable Length 12 Inches
Max Baud 96 Byte Buffer
Warranty 3 Years Limited
4.7Editor score
Best Budget
SABRENT USB to Serial DB9 Adapter
Chipset Prolific PL2303GS
Cable Length Not Specified
Max Baud 460800 bps
Warranty 1 Year Extendable
4.4Editor score
BENFEI USB to RS-232 Male Adapter
Chipset Prolific PL-2303
Cable Length 6 Feet
Max Baud 1Mbps
Warranty 18 Months
4.2Editor score
StarTech.com USB to RS232 Serial Adapter
Chipset Proprietary
Cable Length 1 Foot
Max Baud 920 kpbs
Warranty Not Specified
4.5Editor score
TRIPP LITE Keyspan High-Speed Adapter
Chipset Keyspan
Cable Length 3 Feet
Max Baud 230 Kbps
Warranty 3 Years
4.6Editor score
StarTech 1-Port USB to Serial Adapter
Chipset Prolific PL2303GT
Cable Length 17 Inches
Max Baud 921.6 Kbps
Warranty 3 Years
4.6Editor score
DTECH 10 Feet USB to RS232 Adapter
Chipset FTDI FT232RL
Cable Length 10 Feet
Max Baud Not Specified
Warranty Not Specified
4.6Editor score
UGREEN 6FT DB9 Male USB to Serial
Chipset PL2303
Cable Length 6 Feet
Max Baud 256kbps
Warranty Not Specified
4.6Editor score
StarTech 3ft 1-Port USB to Serial Cable
Chipset Prolific PL2303GC
Cable Length 3 Feet
Max Baud 230.4 Kbps
Warranty 2 Years
4.5Editor score
1. USB to RS232 USB Serial Adapter with FTDI Chipset – Best Overall D Sub to USB Adapter
USB to RS232 USB Serial Adapter with FTDI Chipset
FTDI Chipset FT232
USB 2.0 Interface
1Mbps Data Transfer Rate
Gold Plated Connectors
This USB to RS232 adapter stands out with its FTDI chipset ensuring reliable communication with legacy serial devices. Rated highly by users it supports a wide range of operating systems making it versatile for various environments.
Pros
- Highly reliable FTDI chipset
- Gold plated connectors ensure durability
- Wide OS compatibility including Linux
- Six foot cable length flexibility
- No external power required
Cons
- Drivers needed for older systems
- Male DB9 end fixed design
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The gold plated connectors and PVC cable construction provide extra durability for frequent use. It supports up to 1Mbps data transfer rates which is efficient for most industrial and professional applications.
One consideration is that driver installation may be needed for older systems although modern OS usually handle it automatically. The male DB9 design is specific so verify your port gender before purchase.
Ideal for users needing a dependable connection for serial modems barcode scanners or PLC controllers this adapter delivers consistent performance. Its plug and play nature simplifies setup for immediate use.
Reliable FTDI Performance
The FTDI chipset ensures stable data transfer reducing errors during serial communication tasks.
Versatile OS Support
Compatible with Windows Mac and Linux systems broadening its utility across different platforms.
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2. TRIPP LITE Keyspan High-Speed Adapter – Premium D Sub to USB Adapter
TRIPP LITE Keyspan High-Speed USB to Serial Adapter
Keyspan Chipset Included
230 Kbps Max Speed
LED Status Light
Three Year Warranty
The TRIPP LITE Keyspan adapter is a premium choice offering high-speed data transfer up to 230 Kbps. It is designed for professional use with a reliable Keyspan chipset and robust build quality.
Pros
- Up to 230 Kbps speed
- LED indicator for activity
- Long three year warranty
- Plug and play convenience
- Bus powered design
Cons
- Higher price point
- Shorter cable length
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Its LED status light provides immediate feedback on data activity which is helpful for monitoring connections. The three year warranty reflects confidence in its longevity and performance reliability.
While it costs more than budget options the included warranty and speed justify the investment for critical applications. The cable is shorter than some alternatives so consider your setup needs.
This adapter is best for users requiring dependable high-speed serial connections with professional support. It simplifies connecting legacy devices to modern computers without compromising on performance.
High-Speed Data Transfer
Supports speeds up to 230 Kbps which is twice the standard serial port speed.
Professional Warranty
Backed by a three year limited warranty for long-term peace of mind.
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3. SABRENT USB to Serial Adapter – Best Budget D Sub to USB Adapter
SABRENT USB 2.0 to Serial DB9 RS232 Male Adapter Cable
Prolific PL2303GS Chipset
460800 bps Max Baud
Fixed Hex Standoffs
One Year Warranty
This SABRENT adapter offers excellent value with a Prolific PL2303GS chipset supporting baud rates up to 460800 bps. It is a budget-friendly option without sacrificing essential performance for serial communication.
Pros
- Affordable price point
- Fixed hex standoffs secure fit
- Supports high baud rates
- 100% electrically tested
- Extendable warranty option
Cons
- Drivers needed for some systems
- No LED indicator
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The fixed hex standoffs ensure a secure connection to female DB9 ports reducing accidental disconnections. Every unit undergoes electrical testing before packing to maintain quality standards.
While it lacks an LED indicator the solid performance and secure fit make up for it. Drivers may need manual installation on some systems but they are readily available.
Ideal for cost-conscious users needing reliable serial connectivity this adapter delivers consistent results. It is a practical choice for PLCs routers and other legacy hardware.
Secure Connection Design
Fixed hex standoffs ensure a stable connection to female DB9 ports during use.
High Baud Rate Support
Supports baud rates up to 460800 bps for efficient data transfer speeds.
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4. IOGEAR USB to PDA/Serial Adapter – D Sub to USB Adapter
IOGEAR USB to PDA/Serial Adapter
USB 1.1 and 2.0 Compatible
LED Status Light
Remote Wakeup Support
12 Inch Cable Length
The IOGEAR adapter is designed for connecting serial GPS devices and other legacy hardware to USB ports. It features an LED light to monitor data transfer activity providing visual feedback during use.
Pros
- High user rating
- LED for data monitoring
- Remote wakeup support
- Includes PC and Mac drivers
- Compact size
Cons
- Short cable length
- Lower speed than others
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With support for USB 1.1 and 2.0 it offers broad compatibility across older and newer systems. Remote wakeup and power management features enhance its utility for power-sensitive setups.
Its compact 12 inch length makes it portable but may limit reach in larger setups. The included drivers simplify installation for both PC and Mac users ensuring quick deployment.
This adapter suits users needing a compact reliable solution for GPS or serial peripherals. It balances portability with essential features for everyday serial communication tasks.
GPS Device Support
Specifically designed to convert serial interfaces on GPS units to USB easily.
Power Management
Supports remote wakeup and power management for efficient energy usage.
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5. BENFEI USB to RS-232 Male Adapter – D Sub to USB Adapter
BENFEI USB to RS-232 Male Adapter
Prolific PL-2303 Chipset
Tinned Copper Conductor
Triple Shielding
18 Month Warranty
This BENFEI adapter features a six foot cable providing flexibility for connecting devices at a distance. It uses a Prolific chipset with triple shielding to ensure stable data transfer rates.
Pros
- Six foot cable length
- Triple shielding for stability
- Wide OS compatibility
- Affordable price
- Unconditional warranty
Cons
- Lower rating than top picks
- Drivers needed for older OS
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The tinned copper conductor enhances conductivity and durability over time. It supports a wide range of operating systems including Windows and Linux making it versatile for various setups.
While rated lower than premium options it offers solid performance for the price. The 18 month unconditional warranty provides added confidence in its reliability.
Best for users needing extended reach without compromising on basic functionality. It is a practical choice for label writers barcode scanners and similar devices.
Extended Cable Reach
Six foot cable length allows flexible placement of serial devices away from computer.
Signal Stability
Triple shielding ensures reliable data transfer reducing interference.
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6. StarTech.com USB to RS232 Serial Adapter – D Sub to USB Adapter
StarTech.com USB to RS232 Serial Adapter
COM Port Retention
Up to 920 kpbs
Broad OS Compatibility
Professional Grade
StarTech.com offers a professional grade solution with COM port retention ensuring your assigned serial port stays consistent after reconnecting. This feature is vital for industrial setups requiring stable configurations.
Pros
- COM port retention feature
- High speed up to 920 kpbs
- Professional grade solution
- Supports industrial sensors
- Linux and Mac support
Cons
- Very short cable length
- Higher price point
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With speeds up to 920 kpbs it outperforms many standard serial ports. It supports a broad range of OS including Linux and Mac making it suitable for diverse environments.
The one foot cable limits reach but suits compact workstation setups. It is designed for connecting and monitoring industrial equipment reliably over long periods.
Ideal for IT professionals managing industrial sensors or digital signage boards. The COM retention feature adds significant value for consistent serial device management.
COM Port Retention
Retains assigned COM port values automatically after disconnect and reconnect cycles.
High Speed Transfer
Supports up to 920 kpbs for faster data transfer than standard ports.
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7. StarTech 1-Port USB to Serial Adapter – D Sub to USB Adapter
StarTech 1-Port USB to Serial Adapter
Prolific PL2303GT Chipset
512 Byte FIFO
17 Inch Cable Length
Three Year Warranty
This StarTech adapter features a lightweight portable design ideal for professionals on the go. It uses a Prolific PL2303GT chipset supporting baud rates up to 921.6 Kbps efficiently.
Pros
- Portable lightweight design
- Supports parity modes
- High baud rate support
- Three year warranty
- Multi-lingual support
Cons
- Shorter cable length
- Mid-range price
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The 512 byte FIFO buffer enhances data flow management. It supports multiple parity modes and data bits ensuring compatibility with varied legacy devices and protocols.
While the 17 inch cable is short it fits easily into carrying cases for travel. The three year warranty includes free lifetime technical assistance for added support.
Best for IT professionals needing reliable portable serial connectivity. Its technical support and warranty make it a trustworthy choice for field work.
Portable Design
Lightweight design conveniently fits into carrying cases for professionals.
Technical Support
Includes free lifetime 24/5 multilingual technical assistance for troubleshooting.
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8. DTECH 10 Feet USB to RS232 Adapter – D Sub to USB Adapter
DTECH 10 Feet USB to RS232 Adapter
FTDI FT232RL Chipset
10 Feet Cable Length
Gold Plated Connector
Active Pins 2 3 5
The DTECH adapter stands out with its ten foot cable allowing devices to be placed far from the computer. It uses a high performance FT232RL chip ensuring reliable serial communication.
Pros
- Long 10 feet cable
- Reliable FTDI chipset
- Gold plated connector durability
- Wide OS compatibility
- Bright blue injection design
Cons
- May be bulky for travel
- No LED indicator
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Gold plated connectors and strong blue injection molding enhance durability and aesthetics. It supports Windows Linux and Mac systems making it versatile for different environments.
The long cable length is a major advantage for industrial setups where space is limited. However it may be bulkier for pocket carry compared to shorter adapters.
Ideal for users needing extended reach with reliable performance. Its FTDI chipset and durable construction make it suitable for frequent use.
Extended Reach
Ten foot cable provides flexibility for placing devices at a distance.
Durable Build
Gold plated connectors and strong injection molding ensure long-lasting use.
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9. UGREEN 6FT DB9 Male Adapter – D Sub to USB Adapter
UGREEN 6FT DB9 Male USB to Serial
PL2303 Professional Chip
Up to 256kbps Speed
Gold Plated Connectors
PVC Jacket
UGREEN adapter offers easy usability with driver-free support on Windows 8 and above. It uses a PL2303 professional chip ensuring stable signal transmission with multiple shielding layers.
Pros
- Flexible PVC jacket
- Gold plated connectors
- Driver free on Win8+
- Stable signal transmission
- Wide device compatibility
Cons
- Limited speed compared to others
- Drivers needed for older OS
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Gold plated connectors and a flexible PVC jacket prevent tangling and enhance durability. It supports transmission rates up to 256kbps which is sufficient for most serial tasks.
The six foot length balances portability and reach. While slower than high-end adapters it provides reliable performance for everyday serial device connections.
Best for casual or office users needing a simple reliable adapter. Its driver-free feature on modern Windows simplifies setup significantly.
Driver Free Support
Driver free for Windows 8 and above simplifying setup and usage.
Signal Stability
Multiple shielding layers protect data from loss during transmission.
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10. StarTech 3ft USB to Serial Cable – D Sub to USB Adapter
StarTech 3ft 1-Port USB to Serial Cable
Prolific PL2303GC Chipset
3ft Cable Length
512 Byte FIFO
Two Year Warranty
This StarTech cable offers secure connection with screw-lock nuts on the DB9 connector ensuring stable attachment. It supports both DB9 and DB25 devices enhancing its versatility.
Pros
- Secure screw-lock nuts
- Supports multiple parity modes
- Ideal for IT applications
- Broad device compatibility
- Free technical assistance
Cons
- Shorter cable length
- Mid-range price
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With a Prolific PL2303GC chipset it supports multiple parity modes and data bits. The 512 byte FIFO helps manage data flow efficiently during transfers.
The three foot length is sufficient for desktop setups but may limit reach. It is designed for IT applications in server rooms and industrial control.
Best for IT professionals needing secure reliable serial connections. Its technical assistance and warranty add value for professional environments.
Secure Connection
Screw-lock nuts on the connector secure the cable to the serial port.
Broad Parity Support
Supports Odd Even Mark Space and None parity modes for flexibility.
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Buying Guide – How to Choose the Best D Sub to USB Adapter
Selecting the right adapter requires considering chipset reliability cable length and compatibility with your devices and operating system.
Chipset Quality
The chipset inside the adapter determines stability and driver support. FTDI chipsets are renowned for reliability and broad compatibility with fewer driver issues. Prolific chipsets are common and cost-effective but may require manual drivers for older systems. Choosing a well-reviewed chipset ensures fewer connection drops and better performance over time.
Look for adapters using FTDI or high-quality Prolific chipsets for consistent serial communication.
Cable Length
Cable length affects flexibility in device placement. Shorter cables are portable but may not reach distant peripherals. Longer cables offer convenience but can become bulky. Consider your workspace setup to decide between compact 12 inch cables or extended 6 to 10 foot options.
Choose cable length based on your physical setup needs to ensure convenient device placement.
Operating System Compatibility
Ensure the adapter supports your OS including Windows Linux and Mac. Some adapters require manual driver installation on older systems or Linux. Modern Windows versions often support them automatically but check product details. Verify driver availability for your specific OS before purchasing.
Verify OS compatibility and driver availability for your specific system before buying.
Baud Rate and Speed
Higher baud rates allow faster data transfer which is crucial for real-time applications. Most adapters support up to 1Mbps or 920 kpbs suitable for most tasks. Check your device requirements to ensure the adapter meets your speed needs. Faster speeds improve efficiency for data-heavy tasks.
Select an adapter with sufficient baud rate for your device data transfer needs.
Connector Durability
Gold plated connectors resist corrosion and ensure stable electrical contact. PVC jackets protect against tangling and physical wear. Frequent plugging and unplugging can wear out cheaper connectors. Durability impacts long-term reliability especially in industrial environments.
Prioritize gold plated connectors and robust jackets for long-term durability.
Warranty and Support
A solid warranty and accessible customer service provide peace of mind. Brands like StarTech and Tripp Lite offer years of coverage. Check for technical support availability especially for complex setups. Strong support helps resolve driver or compatibility issues quickly.
Look for adapters with multi-year warranties and responsive customer support teams.
Port Gender and Type
Confirm if your device needs a male or female DB9 connector. Most adapters are male DB9 to USB but some devices require female ends. Mismatched genders prevent connection. Verify your device port type before ordering to avoid returns.
Confirm your device port gender and type before purchasing the adapter.
Budget Considerations
Adapters range from affordable budget models to premium options with extra features. Budget options suffice for basic tasks while premium ones offer speed and warranties. Balance cost with reliability needs based on your application. Investing a bit more often ensures fewer headaches.
Balance budget with reliability needs to find the right value for your use case.
How to Use and Care for Your D Sub to USB Adapter
Connect the USB end to your computer and plug the DB9 connector into your serial device. Ensure the port genders match before attaching to avoid damage. Install any required drivers as prompted or from the product page.
Use screw-lock nuts on the adapter to secure the connection if available. This prevents accidental disconnections during operation. Avoid bending the cable sharply near connectors to maintain integrity.
Store the adapter in a dry place when not in use to protect connectors. Regularly check for dust buildup and clean gently with a dry cloth. This maintains optimal performance and extends adapter lifespan.
Frequently Asked Questions
What is a D Sub to USB adapter used for?
A D Sub to USB adapter connects legacy serial devices with DB9 connectors to modern computers with USB ports. It enables communication with industrial equipment PLCs and barcode scanners. This is essential when your device lacks native USB support.
Do I need to install drivers?
Some adapters require driver installation depending on your operating system. Modern Windows versions often recognize them automatically but Linux and Mac may need manual setup. Always check product details for driver requirements before using.
Can I use this for video like VGA?
No these adapters are for serial data communication only not video output. They convert serial signals not VGA or HDMI signals. Using them for video will not work. Check product titles for not VGA warnings.
What is the difference between FTDI and Prolific chipsets?
FTDI chipsets are known for higher reliability and fewer driver issues across systems. Prolific chipsets are common and affordable but may need manual drivers. For critical applications FTDI is often preferred for stability.
How do I know if I need male or female DB9?
Check the connector on your serial device. If the pins are inside the connector it is female and needs a male adapter. If pins stick out it is male. Match the genders for proper connection.
Why is my adapter not recognized?
Possible reasons include missing drivers wrong OS support or hardware issues. Try reinstalling drivers from the manufacturer site. Ensure the USB port works with another device. Check cable integrity for physical damage.
Are these adapters compatible with Mac?
Most modern adapters support macOS but may require specific drivers. Check product descriptions for Mac OS compatibility details. Some models work out of the box while others need setup.
What is the typical data transfer speed?
Typical speeds range from 115200 bps to 1Mbps depending on the adapter. Higher baud rates like 460800 bps are available on some models. This is sufficient for most serial device communication needs.
Final Thoughts on Choosing the Best D Sub to USB Adapter
The top picks include the FTDI adapter for overall reliability the Tripp Lite for premium performance and the Sabrent for budget value. Each offers distinct advantages based on your specific needs.
Prioritize chipset quality and OS compatibility to ensure seamless operation. Consider cable length and warranty coverage for long-term satisfaction in professional or industrial settings.
Prices and stock vary so verify current offers before purchasing. This guide helps you make an informed choice to bridge legacy devices with modern systems effectively.