SABRENT USB 2.0 to Serial
4.4Editor score
Affordable pricing
PL2303GS chipset
Fixed hex standoffs
Bus powered design
In this guide
Connecting legacy serial hardware to modern systems requires a reliable D Sub to USB adapter that ensures stable data transmission. Whether you manage industrial equipment or older peripherals, choosing the right adapter prevents communication errors and downtime.
We compared ten top-rated adapters based on chipset reliability, cable length, operating system support, and build quality. Our analysis highlights models that deliver consistent performance across Windows, Mac, and Linux environments without requiring complex setup.
Each pick includes detailed specifications, pros, cons, and usage scenarios to help you match the adapter to your specific hardware needs. Prices fluctuate frequently, so verify current listings before purchasing to ensure you get the best value available today.
Top 3 Picks for Best D Sub to USB Adapter
USB to RS232 with FTDI Chipset
4.6Editor score
Reliable FTDI chipset
Universal OS support
Gold plated connectors
1 Mbps transfer rate
TRIPP LITE Keyspan High-Speed
4.6Editor score
230 Kbps speed
LED status indicator
No external power
3 year warranty
Top 10 Best D Sub to USB Adapter in 2026 Compared
This side by side comparison evaluates all ten adapters on key performance metrics including chipset type, cable length, and compatibility to help you find the right fit.
ProductsSpecificationsEditor scorePrice
Editor's Choice
USB to RS232 FTDI
FTDI Chipset
6 Feet Cable
Windows Mac Linux
1 Mbps Rate
4.6Editor score
Editor's Choice
IOGEAR USB to PDA Serial
USB 1.1 2.0
LED Status Light
96 Byte Buffer
3 Year Warranty
4.7Editor score
Best Budget
SABRENT USB 2.0
PL2303GS Chipset
Fixed Nut Standoffs
All 9 Signals
2 Year Warranty
4.4Editor score
BENFEI USB to Serial
Prolific Chipset
6 Feet Length
Triple Shielding
18 Month Warranty
4.2Editor score
StarTech COM Port Retention
COM Retention
1 Foot Cable
920 kbps Rate
Industrial Grade
4.5Editor score
TRIPP LITE Keyspan
High Speed USB
3 Foot Cable
230 Kbps Rate
LED Indicator
4.6Editor score
StarTech 17in Portable
17 Inch Cable
512 Byte FIFO
PL2303GT Chipset
Lightweight Design
4.6Editor score
DTECH 10 Feet
FT232 Chipset
10 Feet Length
Gold Plated
Blue Jacket
4.6Editor score
UGREEN 6FT DB9 Male
PL2303 Chipset
6 Feet Length
Gold Plated Ports
256 kbps Rate
4.6Editor score
StarTech 3ft Prolific
3 Foot Cable
PL2303GC Chipset
DB25 Compatible
230.4 Kbps
4.5Editor score
1. USB to RS232 with FTDI Chipset – Best Overall D Sub to USB Adapter
USB to RS232 with FTDI Chipset
FTDI Chipset
6 Feet Cable
Universal OS Support
1 Mbps Transfer
This adapter stands out as the top choice due to its inclusion of a genuine FTDI chipset which guarantees stable connections across modern and legacy systems. Users appreciate the six foot cable length that provides flexibility in industrial or office setups.
Pros
- Highly reliable chipset
- Wide OS compatibility
- Gold plated connectors
- No external power needed
- Durable PVC cable
Cons
- Drivers needed for older systems
We may earn a commission when you buy through this link, at no additional cost to you.
The FTDI chipset ensures faster operation and reliable data transfer up to one megabit per second. Gold plated connectors resist corrosion while the PVC cable offers extra durability for frequent plugging and unplugging without signal degradation.
While driver installation is required on older operating systems like Windows XP, the process is straightforward via the official website. This minor setup step is acceptable given the consistent performance and robust build quality that prevent communication errors.
Professionals managing PLC controllers, barcode scanners, or legacy serial devices will find this adapter indispensable. It is the recommended choice for anyone needing a dependable bridge between USB ports and DB9 serial interfaces today.
Superior Chipset Reliability
The FTDI chipset provides unmatched stability for serial communication, reducing data loss during critical industrial monitoring tasks.
Extended Cable Flexibility
A six foot length allows easy routing in tight server rooms or between devices spaced apart on workbenches.
We may earn a commission when you buy through this link, at no additional cost to you.
2. IOGEAR USB to PDA Serial – Best Premium D Sub to USB Adapter
IOGEAR USB to PDA Serial
USB 1.1 2.0
LED Status Light
96 Byte Buffer
3 Year Warranty
IOGEAR delivers a premium experience with robust construction and an LED indicator that visually confirms data transfer activity at a glance. This model supports USB 1.1 and 2.0 ensuring broad compatibility with older and newer computer ports.
Pros
- Excellent build quality
- LED activity monitoring
- Long warranty coverage
- Remote wakeup support
- Universal compatibility
Cons
- Shorter cable length
We may earn a commission when you buy through this link, at no additional cost to you.
The nine byte byte buffer efficiently manages upstream and downstream data transfers to prevent packet loss. Remote wakeup capabilities allow the adapter to power on from sleep modes while the three year warranty provides peace of mind.
Its compact twelve inch design limits reach for distant devices but maintains portability for field technicians. The LED light offers immediate feedback on connection status which helps quickly diagnose issues during troubleshooting sessions.
Ideal for users prioritizing reliability and warranty support this adapter excels in professional environments where consistent serial communication is vital. Choose this for GPS devices or specialized legacy peripherals requiring trusted brand quality.
Visual Activity Monitoring
The LED status light provides instant confirmation of active data transmission helping users verify connections quickly.
Extended Warranty Protection
A three year limited warranty covers defects and ensures long term investment protection for critical infrastructure.
We may earn a commission when you buy through this link, at no additional cost to you.
3. SABRENT USB 2.0 to Serial – Best Budget D Sub to USB Adapter
SABRENT USB 2.0 to Serial
PL2303GS Chipset
Fixed Nut Standoffs
All 9 Signals
2 Year Warranty
This SABRENT adapter offers exceptional value for budget conscious buyers needing reliable serial connectivity without sacrificing essential features. The male DB9 connector includes fixed hex standoffs ensuring secure attachment to female ports during use.
Pros
- Affordable price point
- Fixed hex standoffs
- Fully wired signals
- Extendable warranty
- Bus powered
Cons
- Basic cable material
We may earn a commission when you buy through this link, at no additional cost to you.
All nine signals including DCD RXD TXD are wired to support complete RS 232 communication protocols. Users can extend the one year warranty to two years by registering the unit within ninety days of purchase.
While the cable lacks premium shielding found in costlier models it performs adequately for standard data rates up to four hundred sixty thousand eight hundred bits per second. Windows systems often detect it automatically minimizing setup time.
Perfect for connecting PLCs or test instruments in controlled environments this adapter balances cost and functionality effectively. Select it when you need a straightforward USB to serial bridge without extra bells or whistles.
Secure Connection Design
Fixed hex standoffs lock the connector in place preventing accidental disconnection during data transfers.
Warranty Registration Perk
Registering within ninety days doubles the warranty period offering extended protection against manufacturing defects.
We may earn a commission when you buy through this link, at no additional cost to you.
4. BENFEI USB to Serial – Solid Choice D Sub to USB Adapter
BENFEI USB to Serial
Prolific Chipset
6 Feet Length
Triple Shielding
18 Month Warranty
BENFEI provides a six foot adapter with triple shielding to minimize interference during data transmission. It supports a broad range of operating systems from Windows 11 down to legacy versions and MacOS or Linux.
Pros
- Triple shielding
- Wide compatibility
- Six feet cable
- Good value
- No external power
Cons
- Chipset availability issues
We may earn a commission when you buy through this link, at no additional cost to you.
Tinned copper conductors enhance signal integrity while the triple shielding ensures optimal data transfer rates even in electrically noisy environments. Plug and play setup simplifies installation after initial driver installation on supported systems.
The eight year warranty reflects confidence in durability though chipset compatibility should be verified for specific needs. USB bus power eliminates the need for external adapters keeping the setup clean and mobile.
This adapter works well for digital cameras label writers or barcode scanners in small business settings. Choose BENFEI when you need extra cable length without compromising basic connectivity stability.
Enhanced Signal Protection
Triple shielding reduces electromagnetic interference to maintain clean data streams over longer distances.
Extended Cable Utility
Six feet of cable provides ample reach for connecting devices in remote corners of a workspace.
We may earn a commission when you buy through this link, at no additional cost to you.
5. StarTech COM Port Retention – Enterprise D Sub to USB Adapter
StarTech COM Port Retention
COM Retention
1 Foot Cable
920 kbps Rate
Industrial Grade
StarTech engineered this adapter with COM port retention to maintain assigned serial port values when disconnected. This feature ensures seamless reconnection without manual reconfiguration in network or industrial settings.
Pros
- COM port retention
- High baud rates
- TAA compliant
- Professional grade
- Easy integration
Cons
- Very short cable
We may earn a commission when you buy through this link, at no additional cost to you.
Supporting up to nine hundred twenty thousand bits per second it handles high speed serial communication efficiently. TAA compliance makes it suitable for government procurement while broad OS compatibility simplifies deployment.
The one foot length restricts placement options but reduces cable clutter in rack mounted equipment. It works reliably with sensors digital signage boards and industrial equipment requiring persistent serial connections.
Ideal for IT professionals managing multiple devices this model minimizes configuration overhead during routine maintenance. Select it when consistent COM port assignment is critical for your workflow automation.
Persistent Port Configuration
Nonvolatile memory retains COM port values preventing application errors after unplugging.
Government Procurement Ready
TAA compliance ensures eligibility for federal and state government purchasing contracts.
We may earn a commission when you buy through this link, at no additional cost to you.
6. TRIPP LITE Keyspan High-Speed – Premium D Sub to USB Adapter
TRIPP LITE Keyspan High-Speed
High Speed USB
3 Foot Cable
230 Kbps Rate
LED Indicator
TRIPP LITE Keyspan adapters deliver high speed performance up to two hundred thirty kilobits per second twice the speed of standard serial ports. The LED indicator provides immediate visual feedback on adapter activity and status.
Pros
- High transfer speeds
- LED status display
- Trusted brand
- No external power
- Plug and play
Cons
- Higher price point
We may earn a commission when you buy through this link, at no additional cost to you.
Plug and play functionality allows any program accessing COM ports to use this adapter without complex setup. It draws power directly from the USB connection eliminating the need for external power adapters during use.
The three foot cable balances reach and manageability making it suitable for desktop setups or portable cases. Build quality reflects professional standards ensuring consistent performance under regular daily usage conditions.
Recommended for Mac and PC users needing reliable high speed serial connections this adapter justifies its premium with robust support. Choose Keyspan when uptime and brand reputation are top priorities for your hardware.
Double Standard Speed
Achieves 230 Kbps transfer rates offering faster communication than traditional serial ports.
Brand Reliability
TRIPP LITE provides trusted industry support ensuring long term compatibility and warranty backing.
We may earn a commission when you buy through this link, at no additional cost to you.
7. StarTech 17in Portable – Portable D Sub to USB Adapter
StarTech 17in Portable
17 Inch Cable
512 Byte FIFO
PL2303GT Chipset
Lightweight Design
Designed for IT professionals on the go this adapter features a lightweight design that fits easily into carrying cases. Its seventeen inch cable provides enough reach for nearby devices while maintaining a compact profile.
Pros
- Lightweight portable
- 512 Byte FIFO
- USB 3.0 compatible
- 3 year warranty
- 24/7 support
Cons
- Short cable length
We may earn a commission when you buy through this link, at no additional cost to you.
A five hundred twelve byte FIFO buffer ensures smooth data transfer reducing latency during communication tasks. Compatible with USB 1.0 2.0 and 3.0 ports it offers broad compatibility across modern and legacy computers.
The PL2303GT chipset supports various parity modes and data bits to match diverse device requirements. A three year warranty includes free lifetime technical assistance providing expert guidance when needed.
Perfect for field technicians connecting barcode scanners or receipt printers this adapter balances portability and performance. Select it for mobile applications where weight and reliability matter most.
Mobile Professional Friendly
Compact lightweight design allows easy transport in tool bags or laptop cases.
Support Buffer Efficiency
512 Byte FIFO minimizes data loss during burst transmissions for smoother operations.
We may earn a commission when you buy through this link, at no additional cost to you.
8. DTECH 10 Feet – Extended Range D Sub to USB Adapter
DTECH 10 Feet
FT232 Chipset
10 Feet Length
Gold Plated
Blue Jacket
This DTECH adapter offers ten feet of cable length reaching devices far from the computer desk. The FT232RL chipset delivers reliable performance with gold plated connectors resisting corrosion over time.
Pros
- Long cable length
- FTDI chipset
- Bright blue cable
- Gold connectors
- Universal OS
Cons
- Bulkier due to length
We may earn a commission when you buy through this link, at no additional cost to you.
Its bright blue jacket makes the cable easy to identify in cluttered setups preventing accidental disconnections. Supports Windows 11 10 8 7 and Mac or Linux systems ensuring broad software compatibility.
The long length accommodates remote industrial sensors or server racks without requiring extension cables. Active pins include RXD TXD and GND enabling essential serial communication for most devices.
Choose this model when placement flexibility is required for connecting routers GPS or programming machines. It stands out for its practical length and trusted chipset technology at a reasonable price.
Extended Reach Capability
Ten feet of cable allows connection to devices in hard to reach locations easily.
Easy Visual Identification
Distinct blue jacket helps differentiate this adapter in complex cable environments quickly.
We may earn a commission when you buy through this link, at no additional cost to you.
9. UGREEN 6FT DB9 Male – Versatile D Sub to USB Adapter
UGREEN 6FT DB9 Male
PL2303 Chipset
6 Feet Length
Gold Plated Ports
256 kbps Rate
UGREEN delivers a six foot adapter with gold plated connectors enhancing durability and connection reliability. A flexible PVC jacket prevents tangling helping you manage cable length in organized workspaces.
Pros
- Durable gold plating
- Flexible PVC jacket
- High speed
- Stable signal
- Universal OS
Cons
- Driver needed on Win7
We may earn a commission when you buy through this link, at no additional cost to you.
Transmission rates up to two hundred fifty six kilobits per second ensure quick data transfers between devices. The PL2303 professional chip with multiple shielding layers maintains stable signal integrity during operation.
Windows 11 10 support driver free installation simplifying setup for modern users. Older systems may need driver installation which is available online or on the included CD.
Ideal for cash registers POS systems or PLC controllers this adapter meets diverse serial needs effectively. Pick UGREEN for consistent performance and robust construction in small business environments.
Tangle Free Cable Management
Flexible PVC jacket resists knots ensuring neat organization in storage and use.
Stable Data Integrity
Multiple shielding layers protect signals from interference ensuring reliable data transmission.
We may earn a commission when you buy through this link, at no additional cost to you.
10. StarTech 3ft Prolific – Compact D Sub to USB Adapter
StarTech 3ft Prolific
3 Foot Cable
PL2303GC Chipset
DB25 Compatible
230.4 Kbps
This StarTech adapter supports both DB9 and DB25 devices with screw-lock nuts securing connections firmly. Its three foot cable offers enough reach for typical desktop connections in server rooms.
Pros
- DB25 compatible
- Screw-lock nuts
- 3 year warranty
- High speed
- Universal support
Cons
- Limited to specific models
We may earn a commission when you buy through this link, at no additional cost to you.
Using the PL2303GC chipset it achieves transfer rates up to two hundred thirty kilobits per second. Supports multiple parity modes and data bits to ensure compatibility with diverse serial devices.
Ideal for IT applications like logistics or AV installations this model bridges legacy hardware with modern systems. A two year warranty and twenty four seven support ensure long term reliability.
Choose this adapter when DB25 compatibility is required alongside standard DB9 interfaces. It is a dependable choice for maintaining legacy hardware in professional technical environments.
Dual Interface Compatibility
Supports both DB9 and DB25 connectors for maximum device compatibility.
Secure Mechanical Locking
Screw-lock nuts on the connector ensure stable physical connections during operation.
We may earn a commission when you buy through this link, at no additional cost to you.
Buying Guide – How to Choose the Best D Sub to USB Adapter
Choosing the right D Sub to USB adapter requires evaluating chipset reliability compatibility and build quality to ensure seamless integration with your hardware.
Chipset Reliability
The chipset determines connection stability and driver support. Models with FTDI chipsets are widely regarded as the most reliable offering consistent performance across operating systems and minimizing driver conflicts that can cause communication dropouts.
Prioritize adapters using FTDI or well-tested Prolific chipsets to avoid compatibility issues and ensure long-term reliability in critical workflows.
Operating System Compatibility
Verify that the adapter supports your specific operating system version. While many adapters support Windows 10 and 11, older systems like Windows 7 or XP may require manual driver installation which could affect plug-and-play convenience.
Check manufacturer support pages to confirm driver availability for your OS before purchasing to prevent setup complications.
Cable Length Requirements
Cable length impacts placement flexibility especially in server rooms or industrial environments. Adapters range from one foot to ten feet so measure your required reach to avoid needing additional extension cables.
Select a length that provides comfortable access to your serial device without creating cable clutter or trip hazards.
Build Quality and Shielding
Premium adapters feature gold plated connectors and triple shielding to resist corrosion and electromagnetic interference. Durable PVC jackets prevent tangling and extend the adapter lifespan in high-use scenarios.
Invest in robust construction if your adapter will be frequently plugged and unplugged or used in electrically noisy environments.
Data Transfer Speed
Maximum baud rates vary from standard ninety six kilobits per second to over two hundred thirty kilobits per second. Higher speeds are beneficial for real-time monitoring or rapid data logging applications.
Ensure the adapter supports the required transfer rate for your specific device to avoid bottlenecks during communication.
Power Source
Most adapters draw power directly from the USB port eliminating the need for external power supplies. Bus-powered designs simplify setup and improve portability for field technicians.
Confirm the adapter is bus-powered if you need a standalone solution without additional power cables.
Warranty and Support
Warranty terms range from one to three years with some manufacturers offering lifetime technical assistance. A longer warranty indicates confidence in product durability and provides recourse for defects.
Choose brands with responsive customer support and clear warranty policies to protect your investment over time.
Connector Type Verification
Ensure the connector gender matches your device port. Most adapters use a male DB9 plug but confirm whether your hardware requires a male or female interface before ordering.
Double check specifications to avoid purchasing an incompatible adapter that cannot connect to your hardware.
How to Use and Care for Your D Sub to USB Adapter
Connect the USB end of the adapter to your computer and the DB9 connector to your serial device. Install any necessary drivers from the manufacturer's website to ensure your operating system recognizes the adapter as a COM port.
Configure your software application to use the assigned COM port with the correct baud rate parity and data bits. Verify settings by testing data transmission to confirm stable communication between the devices.
Handle the adapter gently avoiding excessive bending of the cable. Store it in a dry place away from heat or moisture to maintain longevity and reliable performance during future connections.
Frequently Asked Questions
Is a D Sub to USB adapter the same as a VGA adapter?
No, a D Sub to USB adapter for serial communication uses a DB9 connector while VGA adapters use a DB15 connector. Ensure you select the correct adapter type to avoid compatibility issues with your specific hardware requirements.
Do I need to install drivers for all operating systems?
Modern systems like Windows 10 and 11 often recognize these adapters automatically, but older systems such as Windows 7 or macOS may require manual driver installation. Always check manufacturer documentation to confirm driver needs for your OS.
Can this adapter be used for printing?
No, USB to serial adapters are designed for RS-232 communication and do not function as printer or video adapters. They connect serial devices like modems or controllers rather than standard printers or monitors.
What is the maximum cable length supported for serial?
Standard RS-232 signals are typically reliable up to fifty feet but USB extensions can reach further. Most adapters come in lengths from one to ten feet which are sufficient for most desktop or industrial setups.
How do I know if my device uses serial communication?
Check your device manual for RS-232 or DB9 specifications. Devices like PLC controllers barcode scanners or older modems usually use serial while modern peripherals often use USB directly without needing an adapter.
Why does the connection drop intermittently?
Intermittent drops may result from insufficient USB power driver conflicts or cable damage. Try a different USB port update drivers or replace the adapter if physical damage is suspected to restore stability.
Final Thoughts on Choosing the Best D Sub to USB Adapter
We reviewed ten reliable D Sub to USB adapters highlighting the FTDI equipped USB to RS232 as the top choice for overall performance and compatibility. The IOGEAR and TRIPP LITE models offer premium reliability while SABRENT provides excellent budget value.
Prioritize chipset type and cable length to match your specific hardware environment and ensure consistent data transmission across your workflow. Verify driver support for your operating system to avoid setup complications after purchase.
Prices and availability change frequently so confirm current listings on the product pages before buying. These adapters bridge legacy hardware with modern computing ensuring your critical serial devices remain operational.