What are the alternatives to the Plugable USB to Serial RS-232 Adapter (5ft) with COM Retention - Compatible…?

Plugable USB to Serial RS-232 Adapter (5ft) with COM Retention - Compatible… competes with other Cables & Connectors products on SpecPicks. Use our Compare tool to view specs side-by-side, or browse the full Cables & Connectors category for alternatives.

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

Name: Plugable USB to Serial RS-232 Adapter (5ft) with COM Retention - Compatible with Windows, Mac, Linux (DB9 DTE Male Connector, Prolific PL2303GT
Brand: Plugable
SKU: B00425S1H8
Price: 24.95 USD
Availability: InStock

By SpecPicks Editorial · Verified 2026-07-07

$24.95

Buy on Amazon — $24.95 Compare to similar cables & connectors

*Price sourced from Amazon.com. Last updated 2026-07-07. 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.

Check price on Amazon →

*Price sourced from Amazon.com. Last updated 2026-07-07. Price and availability subject to change.