SABRENT USB 2.0 to Serial Adapter
4.4Editor score
Prolific PL2303GS chipset
Affordable price point
All 9 signals wired
In this guide
Finding the right D Sub to USB adapter is crucial for connecting legacy serial devices to modern computers. These adapters bridge the gap between old hardware and new systems, ensuring seamless communication without needing obsolete ports. A good adapter offers reliable data transfer, broad OS compatibility, and durable construction for long-term use.
We compared ten top-rated adapters based on chipset quality, cable length, warranty terms, and user feedback. Each product was evaluated for its ability to maintain stable connections, support high baud rates, and integrate smoothly with Windows, macOS, and Linux systems. Our analysis highlights key differences to help you choose the best fit.
Each pick in this list showcases specific strengths like portability, professional-grade features, or cost-effectiveness. We include detailed specs, pros, cons, and usage tips to guide your decision. Please note that prices and availability may change over time, so verify current details before purchasing to ensure you get the best value.
Top 3 Picks for Best D Sub to USB Adapter
USB to RS232 with FTDI Chipset
4.6Editor score
FTDI chipset for reliability
1Mbps data transfer rate
Universal OS compatibility
TRIPP LITE Keyspan High-Speed Adapter
4.6Editor score
230 Kbps transfer rate
3-Year limited warranty
LED status indicator
Top 10 Best D Sub to USB Adapter in 2026 Compared
This side-by-side comparison highlights key specifications for all ten adapters to help you quickly identify the best match for your specific connectivity needs and budget constraints.
ProductsSpecificationsEditor scorePrice
Editor's Choice
USB to RS232 with FTDI Chipset
FTDI chipset
6ft cable length
1Mbps max rate
Universal OS support
4.6Editor score
Editor's Choice
IOGEAR USB to PDA/Serial Adapter
12 in cable
LED status light
96 byte buffer
3 year warranty
4.7Editor score
Best Budget
SABRENT USB 2.0 to Serial Adapter
Prolific chipset
All 9 signals
1 year warranty
Bus powered
4.4Editor score
BENFEI USB to Serial Adapter
6ft cable length
Prolific chipset
Triple shielding
18 month warranty
4.2Editor score
StarTech.com USB to RS232 Serial Adapter
1 ft cable
COM port retention
920 kpbs max
TAA compliant
4.5Editor score
TRIPP LITE Keyspan High-Speed Adapter
3 ft cable
230 Kbps rate
LED status light
3 year warranty
4.6Editor score
StarTech 17in USB to Serial Adapter
17in cable length
Prolific chipset
921.6 Kbps max
3 year warranty
4.6Editor score
DTECH 10 Feet USB 2.0 Adapter
10ft cable length
FTDI chipset
LED indicator
Universal support
4.6Editor score
UGREEN 6FT DB9 Male Adapter
6ft cable length
PL2303 chipset
256kbps max
Gold-plated connector
4.6Editor score
StarTech 3ft USB to Serial Cable
3ft cable length
Prolific chipset
230.4 Kbps max
2 year warranty
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
1Mbps Transfer Rate
6ft Cable Length
Plug and Play
This adapter is a top choice for users needing reliable serial connectivity. It features the FTDI chipset known for stability and speed, ensuring your devices communicate without dropouts. With a 4.6 rating, users praise its ease of use and broad compatibility across Windows and Mac systems.
Pros
- High reliability FTDI chip
- Supports wide OS range
- Gold plated connectors
- No external power needed
- Durable PVC cable
Cons
- Not for video use
- Manual driver install needed
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The standout quality is its robust construction and universal support. The gold-plated connectors and PVC cable enhance durability, while the 1Mbps transfer rate meets most industrial needs. Its plug-and-play nature simplifies setup, making it ideal for professionals who value time and efficiency.
While it excels in most areas, note that it only supports data transfer, not video output. Some users may need to download drivers manually for older systems, but this is a minor trade-off for the reliability it offers. The fixed nut design ensures a secure connection during use.
Buy this adapter if you need a dependable link between legacy serial devices and modern computers. It is perfect for industrial automation, barcode scanners, or GPS units. The combination of quality materials and chipset reliability makes it our top recommendation for general use.
Reliable FTDI Chipset Performance
The FTDI chipset ensures stable data transfer and broad driver support across multiple operating systems.
Durable and Practical Design
Gold-plated connectors and a flexible PVC cable provide long-lasting performance for daily use.
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2. IOGEAR USB to PDA/Serial Adapter – Great for GPS Integration
IOGEAR USB to PDA/Serial Adapter
USB 1.1/2.0
LED Status Light
3 Year Warranty
12 inch Cable
This IOGEAR adapter is highly rated for its ease of use with GPS units and other serial peripherals. With a 4.7 rating, users appreciate the included drivers and LED light that shows data activity at a glance. Its compact design makes it easy to carry for field work.
Pros
- Clear LED status indicator
- Includes PC and Mac drivers
- Long 3-year warranty
- Low power consumption
- Supports GPS devices
Cons
- Short cable length
- Limited to 96 byte buffer
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Key strengths include its broad compatibility and robust warranty. The adapter supports USB 1.1 and 2.0 standards, ensuring it works with older and newer ports. The 3-year limited warranty provides peace of mind, and the low power draw means no extra power source is needed.
The main limitation is the short cable length, which may restrict placement options in larger setups. Additionally, the 96-byte buffer might not suit high-volume data transfers, but it suffices for standard serial communication. Overall, it remains a solid choice for its target use cases.
Choose this adapter if you need a lightweight solution for GPS or PDA connections. It is particularly useful for technicians who need reliable serial support without bulky equipment. The included drivers and warranty make it a hassle-free option for many users.
Visual Data Activity Monitoring
The built-in LED status light allows you to quickly confirm data transfer activity without software.
Comprehensive Driver Support
Includes drivers for both PC and Mac systems, simplifying setup across different platforms.
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3. SABRENT USB 2.0 to Serial Adapter – Best Value Option
SABRENT USB 2.0 to Serial Adapter
Prolific Chipset
All 9 Signals
Bus Powered
1 Year Warranty
This SABRENT adapter offers excellent value for users needing basic serial connectivity. With a 4.4 rating, it delivers reliable performance at a budget-friendly price point. The design ensures all 9 signals are wired, making it compatible with a wide range of legacy devices.
Pros
- Affordable pricing
- All 9 signals wired
- Simple plug and play
- Supports Linux and macOS
- Fixed hex standoffs
Cons
- Basic build quality
- Driver may need manual install
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Its main advantage is the straightforward setup and broad OS support. The Prolific PL2303GS chipset supports high baud rates, and the bus-powered design eliminates the need for external power. The fixed hex standoffs provide a secure connection to prevent accidental disconnections.
Trade-offs include a basic build and potential driver hurdles for older systems. While the 1-year warranty is standard, the cable lacks extra shielding found in premium models. However, for occasional use, these limitations are negligible given the cost savings.
This adapter is ideal for hobbyists or small businesses on a tight budget. It works well for connecting PLCs, routers, or POS terminals to modern computers. If you prioritize cost over extra features, this model is a solid, no-frills choice.
Cost-Effective Serial Conversion
Delivers essential serial connectivity features at a price point that suits budget-conscious buyers.
Complete Signal Support
All 9 RS-232 signals are wired to ensure compatibility with devices that need full handshaking.
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4. BENFEI USB to Serial Adapter – Solid Mid-Range Pick
BENFEI USB to Serial Adapter
6ft Cable Length
Prolific Chipset
Triple Shielding
18 Month Warranty
The BENFEI adapter balances price and performance with its 6ft cable and shielding. It supports a wide OS range including Windows 11 and macOS. While the rating is slightly lower, users appreciate the longer cable for better placement options and the solid warranty coverage.
Pros
- 6ft cable for flexibility
- Triple shielding for signal
- 18-month warranty
- Works on macOS and Windows
- Plug and play simple
Cons
- Lower user rating
- Cable stiffness reported
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Key strengths include the triple shielding that reduces interference and the 18-month warranty. The Prolific chipset ensures decent baud rates, and the plug-and-play feature simplifies installation. The 6ft length helps reach devices that are further from the computer port.
Some users report the cable can be stiff, which might limit movement in tight spaces. The rating suggests occasional driver issues on older systems, though most find it works well after initial setup. For the price, it remains a competitive option.
Choose this adapter if you need extra cable length and reasonable durability. It is suitable for home offices or light industrial use where the device isn't directly next to the computer. The warranty and shielding add value over basic models.
Extended Cable Reach
The 6ft cable provides flexibility in placing connected devices without crowding the computer desk.
Enhanced Signal Protection
Triple shielding minimizes electromagnetic interference for cleaner data transmission.
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5. StarTech.com USB to RS232 Serial Adapter – Professional Grade
StarTech.com USB to RS232 Serial Adapter
COM Port Retention
920 kbps Rate
TAA Compliant
1ft Cable
This StarTech adapter is designed for professionals needing stable serial connections with port retention. The COM port retention feature ensures your device keeps its assigned ID even after disconnecting. Users rate it highly for its reliability in critical industrial settings.
Pros
- Preserves COM port value
- High data transfer rate
- Professional reliability
- TAA compliant option
- Broad OS support
Cons
- Short 1ft cable
- Higher price point
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Its standout feature is the COM port retention, which simplifies device management in multi-port environments. The 920 kbps rate supports high-speed data needs, and the TAA compliance makes it suitable for government procurement. The compact design keeps clutter low on desks.
The main downsides are the short cable and higher cost. This limits its use to devices close to the computer, and it may be overkill for home users. However, for IT admins managing many peripherals, the port retention justifies the investment.
Opt for this adapter if you are managing multiple serial devices in an office. The port retention and professional build quality make it worth the price. It is particularly valuable for systems where consistent device recognition is vital for operations.
COM Port Retention Feature
Ensures the adapter always uses the same COM port assignment, simplifying device configuration.
Professional Reliability
Built for industrial use with consistent performance and high-speed data transfer.
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6. TRIPP LITE Keyspan High-Speed Adapter – Top Tier Performance
TRIPP LITE Keyspan High-Speed Adapter
230 Kbps Rate
LED Status
3 Year Warranty
3ft Cable
This TRIPP LITE adapter delivers premium performance with fast speeds and durable construction. With a 4.6 rating, it stands out for its LED indicator and 3-year warranty. Users appreciate the reliability for critical applications where data loss is unacceptable.
Pros
- Fast data transfer
- LED data activity indicator
- Premium build quality
- Excellent warranty coverage
- Works on Mac and PC
Cons
- Premium pricing
- Limited cable length
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Its strengths include the high-speed data rate and robust warranty. The LED light helps monitor data activity, and the plug-and-play design simplifies setup. The 3ft cable provides moderate reach, while the build quality ensures long-term use in demanding environments.
The price is higher than standard adapters, and the cable length may not suit all setups. However, for businesses that need dependable hardware, the extra cost is justified. The warranty offers added security against failures during daily operations.
Select this adapter if you need top-tier reliability and performance. It is ideal for industrial control systems or medical devices where stability is paramount. The premium features and warranty make it a best-in-class option for professional users.
High-Speed Data Transfer
Offers twice the speed of standard serial ports for efficient communication with legacy devices.
Premium Warranty and Build
Includes a 3-year limited warranty and solid construction to ensure long-lasting performance.
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7. StarTech 17in USB to Serial Adapter – Portable Professional Choice
StarTech 17in USB to Serial Adapter
17in Cable Length
Prolific Chipset
921.6 Kbps
3 Year Warranty
This StarTech adapter is ideal for professionals who need a portable serial solution. With a 4.6 rating, it balances speed and convenience. The 17-inch cable keeps it compact for travel while delivering high-speed data transfer for various devices.
Pros
- Portable lightweight design
- Fast 921.6 Kbps rate
- Strong 3-year warranty
- Wide device compatibility
- Multi-lingual support
Cons
- Short cable length
- Limited to 1-port use
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Key strengths include its lightweight design and fast baud rate. The adapter supports barcode readers and medical devices with ease. The 3-year warranty and multi-lingual technical assistance ensure support is available when needed for critical deployments.
The short cable limits placement flexibility compared to longer models. It is also single-port focused, which might not suit setups needing multiple connections. However, for IT specialists on the go, the portability and speed are compelling advantages.
Choose this if you frequently move between sites and need reliable serial connections. The combination of speed, warranty, and compact design makes it a strong option for field technicians. It delivers professional results without bulky equipment.
High-Speed Portable Performance
Delivers 921.6 Kbps transfer speeds in a lightweight form factor for easy transport.
Comprehensive Warranty Support
Backed by a 3-year warranty and free lifetime technical assistance for peace of mind.
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8. DTECH 10 Feet USB 2.0 Adapter – Best Long Cable Solution
DTECH 10 Feet USB 2.0 Adapter
10ft Cable Length
FTDI Chipset
LED Indicator
Universal OS Support
The DTECH adapter excels with its 10ft cable, allowing remote device placement. Users rate it highly for the FTDI chipset reliability and clear LED indicator. It supports a broad OS range, making it versatile for both Windows and Mac users.
Pros
- 10ft cable for reach
- FTDI chipset stability
- LED activity indicator
- Strong signal integrity
- Multiple OS drivers
Cons
- Bulkier than short cables
- Price higher than basic
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Its main advantage is the extended cable length, which solves issues with hard-to-reach ports. The FTDI chipset ensures stable data transfer, and the LED light helps monitor activity. The build quality protects signal integrity over the longer distance.
While the cable adds bulk, it remains manageable. The price is moderate, reflecting the extra length and chipset quality. For setups where the computer cannot be near the device, this adapter is a practical and reliable solution.
Pick this if you need significant reach without sacrificing performance. It suits scenarios like lab setups or machinery control where distance matters. The combination of length and chipset reliability makes it a top choice for flexible installations.
Extended Reach Capability
The 10ft cable enables connections to devices placed far from the computer port.
Stable Chipset Performance
FTDI chipset ensures consistent data transmission even with the longer cable length.
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9. UGREEN 6FT DB9 Male Adapter – Balanced Durability
UGREEN 6FT DB9 Male Adapter
6ft Cable Length
PL2303 Chipset
Gold-Plated Connectors
256kbps Rate
This UGREEN adapter offers a good balance of durability and cost. With a 4.6 rating, users appreciate the gold-plated connectors and flexible PVC jacket. The PL2303 chipset ensures stable data transfer for common serial applications.
Pros
- Durable gold-plated connectors
- PVC jacket flexibility
- Reliable chipset
- Supports Win11 and Mac
- Easy driver setup
Cons
- Moderate speed limit
- Limited to 6ft length
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Its strengths include robust connectors that prevent corrosion and a flexible jacket that resists tangling. The 6ft cable provides reasonable reach, and the driver setup is straightforward for most modern systems. It supports a wide OS range effectively.
The speed is lower compared to premium models, but sufficient for most uses. The cable length is fixed, which may not suit all setups. Overall, it is a reliable option for general serial connectivity without extra complexity.
Choose this if you need a durable adapter for daily tasks. It works well for printers, scanners, or POS systems. The build quality and reasonable price make it a smart pick for home or small office use.
Gold-Plated Durability
Gold-plated connectors ensure long-lasting connection quality and resistance to corrosion.
Flexible Cable Management
A flexible PVC jacket prevents tangling and simplifies cable storage and handling.
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10. StarTech 3ft USB to Serial Cable – Reliable IT Solution
StarTech 3ft USB to Serial Cable
3ft Cable Length
Prolific Chipset
512 Byte FIFO
2 Year Warranty
This StarTech cable is built for professional IT environments. With a 4.5 rating, it provides reliable connections with secure screw-lock nuts. The Prolific chipset and 512-byte FIFO buffer ensure stable data handling for critical tasks.
Pros
- Secure screw-lock nuts
- Prolific reliability
- 2-year warranty
- Supports DB9 and DB25
- Professional support
Cons
- Short cable length
- Moderate speed limits
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Its strengths include the secure locking mechanism and broad device support. The adapter works with various serial types, and the 2-year warranty offers added protection. Technical assistance is available for complex deployment scenarios.
The cable length is limited, and speed is standard rather than high. However, for controlled environments like server rooms, these trade-offs are acceptable. The build quality ensures consistent performance during regular maintenance and monitoring tasks.
Opt for this if you manage servers or industrial equipment. The secure connection and professional support make it a trustworthy choice. It is particularly useful where reliability and device compatibility are higher priorities than speed.
Secure Connection Design
Screw-lock nuts ensure a physical connection that stays secure during use.
Professional Support Access
Includes access to multi-lingual technical assistance for challenging IT implementations.
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Buying Guide – How to Choose the Best D Sub to USB Adapter
Selecting the right adapter requires evaluating chipset quality, compatibility, and build features to ensure smooth integration with your devices.
Chipset Quality
The chipset determines reliability and driver support. FTDI and Prolific chips are industry standards for stability and cross-platform compatibility. Always check chipset info before buying to avoid connection issues.
Choose adapters with well-known chipsets for best results.
Cable Length
Cable length affects device placement flexibility. Longer cables offer more freedom but may add bulk. Consider your workspace layout to pick an appropriate length without compromising performance.
Match cable length to your setup needs for convenience.
Operating System Compatibility
Ensure the adapter supports your OS version. Many drivers work on Windows 11, macOS, and Linux, but older systems may need manual installs. Check the product page for supported OS details.
Confirm compatibility with your specific OS version before purchasing.
Warranty and Support
A good warranty reflects manufacturer confidence. Look for at least a 1-year term, with 2-3 years being ideal. Access to technical support helps resolve setup issues quickly.
Prioritize products with solid warranty terms and support.
Connector Design
Connectors should match your device ports. Ensure gender compatibility (male to female) and check for locking nuts to secure the connection. Gold-plated connectors enhance durability and signal quality.
Verify connector type and locking features match your devices.
Baud Rate Support
Higher baud rates allow faster data transfers. Most adapters support up to 230 Kbps, which covers most needs. For industrial or high-speed applications, check for 921.6 Kbps support.
Select based on your data speed requirements.
Build Materials
Durability depends on materials. PVC jackets resist wear, and shielding reduces interference. Sturdy construction ensures longevity, especially in frequent-use scenarios.
Look for durable materials to extend adapter lifespan.
Power Requirements
Most adapters are bus-powered via USB, needing no external power. This simplifies setup. Ensure your USB port supplies enough power for your device if it has higher demands.
Bus-powered designs offer the easiest setup.
How to Use and Care for Your D Sub to USB Adapter
Connect the USB end to your computer and the DB9 end to the serial device securely. Install necessary drivers from the manufacturer's website or use the included CD for initial setup.
Check the OS settings to confirm the COM port is recognized. You may need to adjust baud rates in your software to match the connected device requirements for proper communication.
Store the adapter in a dry place away from heat and physical stress. Avoid bending the cable sharply to prevent internal wire damage and ensure consistent performance over time.
Frequently Asked Questions
Does a D Sub to USB adapter work with VGA monitors?
No, these adapters are for serial data only, not video signals. VGA requires a different type of converter. Ensure your device uses RS-232 serial communication before buying an adapter.
Do I need to install drivers for these adapters?
Most modern systems install drivers automatically upon connection. Older operating systems may require manual driver installation from the manufacturer's website. Always check the product documentation for OS-specific instructions.
What is the difference between FTDI and Prolific chipsets?
Both are reliable serial chipsets. FTDI is often praised for broader driver support and stability. Prolific offers good performance at a lower cost. Either choice works well for standard serial devices.
Can I use the adapter with Linux systems?
Yes, most adapters support Linux with standard kernel drivers. If auto-detection fails, download the Linux driver from the manufacturer's site. Check compatibility lists before purchasing to avoid issues.
How do I know which gender connector I need?
Check your device port. A female port needs a male connector and vice versa. Look at the pins on your device. If unsure, consult the device manual or ask support for clarification.
Are these adapters compatible with USB 3.0 ports?
Yes, USB 2.0 adapters work backward compatible with USB 3.0 ports. They will function correctly without issues. Ensure the USB connector fits the port physically to avoid connection problems.
What should I do if the adapter is not detected?
Try a different USB port and restart your computer. Check device manager for driver status. If the problem persists, reinstall drivers or test with another known working adapter for comparison.
Is there any risk of damaging devices with these adapters?
The risk is low as they include safety features. Always verify voltage levels match your device specs. Avoid connecting high-power devices to prevent electrical issues. Use certified adapters to ensure safety.
Final Thoughts on Choosing the Best D Sub to USB Adapter
We reviewed ten top adapters with standout picks like the FTDI-based model for reliability, SABRENT for budget, and TRIPP LITE for premium needs. Each serves specific use cases well.
Prioritize chipset quality and OS compatibility to avoid setup issues. Consider cable length and warranty when matching the adapter to your workflow requirements for best long-term satisfaction.
Prices and availability may change, so verify current details before buying. Check today's offers to ensure you get the best value for your specific connectivity project needs.