Plugable
USB to Serial RS-232 Adapter (5ft) with COM Retention - Compatible with Windows, Mac, Linux (DB9 DTE Male Connector, Prolific PL2303GT Chipset, Up to 1Mbps) - PL2303-DB9
*Price sourced from Amazon.com. Last updated 2026-07-10. Price and availability subject to change.
Bottom line: The USB to Serial RS-232 Adapter (5ft) with COM Retention - Compatible with Windows, Mac, Linux (DB9 DTE Male Connector, Prolific PL2303GT Chipset, Up to 1Mbps) - PL2303-DB9 is a niche pick — read recent reviews before buying in the cables & connectors category, priced around $24.95. Read recent reviews carefully before committing.
SpecPicks Verdict
SpecPicks classifies Plugable USB to Serial RS-232 Adapter (5ft) with COM Retention… as a niche pick — read recent reviews before buying in the cables & connectors category, based on our editorial and benchmark analysis and our ranking model that weights rating × review-volume × price-fit. Plugable's positioning sits within the broader category mid-tier. Use the Compare tool to put it side-by-side with two or three close alternatives before clicking through to Amazon.
Common buyer scenarios for cables & connectors of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the Amazon listing before purchase. Prices, stock, and Prime eligibility update directly from Amazon's catalog and may have moved since this page was last verified.
Pros & Cons
Pros
- ✓ Backed by Plugable's warranty and support channels
- ✓ Ships via Amazon with Prime eligibility and the standard returns policy
Cons
- ✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
- ✗ Price, stock, and Prime eligibility update from Amazon and may have changed since this page was last verified
Key Features
- USB To RS232 Serial Adapter (5ft) - Connect legacy DB-9 serial communications devices to a modern computer over USB. Powered by USB; no external power needed
- Legacy Support - Add a 9-pin DB9 RS-232 serial port to any modern computer, replaces built-in or PCIe serial adapters, recommended for use with a serial cable or NULL modem cable
- Compatibility Guarantee - Genuine Prolific PL2303GT Chipset for widest possible compatibility with Windows (11, 10, 8.x, 7, and Vista), Mac, Linux, and other platforms
- Flexible - The USB RS-232 adapter supports a programmable baud rate from 75bps to 1Mbps. This RS232 USB Adapter allows for a plug-and-play creation of a COM port. Features COM retention to maintain port number and settings across reboots
- Warranty and Support - Questions only an expert can answer? When you contact our support team, you’re connecting with the engineers who design our devices. Every Plugable product is backed by our North American support team–even before purchase, and a 2-year limited parts and labor warranty after purchase
Full Specifications
| Brand | Plugable |
|---|---|
| Color | Grey |
| Finish | Glossy |
| Unit Count | 1.0 Count |
| Connectivity | USB |
| Model Number | PL2303-DB9 |
| Compatibility | Mac, Linux |
| Warranty Type | Limited |
| Built-In Media | Serial adapter |
| Connector Type | USB Type A |
| Item Type Name | PL-2303HX Serial Adapter |
| Item Dimensions | 26.5 x 1.5 x 0.6 inches |
| Mfr Part Number | PL2303-DB9 |
| Number of Items | 1 |
Ready to buy?
Plugable USB to Serial RS-232 Adapter (5ft) with COM Retention - Compatible with Windows, Mac, Linux (DB9 DTE Male Connector, Prolific PL2303GT Chipset, Up to 1Mbps) - PL2303-DB9 is available on Amazon with Prime shipping and the full Amazon returns policy. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-07-10. Price and availability subject to change.
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