StarTech.com 3ft USB to Serial Adapter, FTDI, RS232, COM Retention

StarTech.com USB to Serial Adapter | FTDI RS232 Cable

This product is the StarTech.com 3ft (1m) USB to Serial Adapter Cable, COM Retention, Interchangeable Screws/Nuts, USB-A to DB9 RS232, FTDI IC, ESD Protection, Windows/macOS/Linux. It is designed for engineers and IT technicians who need a reliable RS-232 connection. The primary USP is the FTDI FT232R chipset, which ensures stable driver performance and COM port retention across multiple operating systems.

Slim Specifications

Reliable COM Port Retention

The adapter features COM retention. This means the assigned COM port number stays the same after you disconnect the cable or reboot the system. In practice, this prevents configuration errors in legacy software that relies on specific port addresses. You do not need to reconfigure your applications every time you plug the device back in.

Interchangeable Screw and Nut Options

You can secure the connection using the pre-installed slotted D-Sub thumbscrews. Alternatively, install the included DB-9 nuts for a more permanent fit. This flexibility ensures compatibility with a wide range of industrial equipment and serial peripherals. The straight form factor simplifies cable management in tight spaces.

Advanced FTDI Chipset and Driver Support

The cable uses the FTDI FT232R chipset. This provides broad compatibility across Windows, macOS, and Linux. Drivers install automatically on modern versions of these operating systems. The chipset supports data rates up to 921.6 Kbit/s, with configurable data bits, stop bits, and parity. This ensures precise communication with your serial devices.

Built for Industrial Environments

The rugged TPE jacket and copper shielding protect against electromagnetic interference (EMI) and radio frequency interference (RFI). Level-4 ESD protection (15kV air, 8kV contact) safeguards the electronics from static discharge. Gold-plated connectors maintain signal integrity over time. The cable operates in temperatures from -40°C to 80°C.

Diagnostic LED Indicators

Integrated LEDs provide real-time feedback. One LED indicates USB enumeration, while others show data transmission and reception. This visual aid helps you quickly diagnose connection issues without additional tools. You can verify port activity and power status at a glance.

In the box

• 1 x StarTech.com 3ft (1m) USB to Serial Adapter Cable
• Interchangeable DB-9 thumbscrews and nuts
• 1 x Manual

Before you order

• Confirm your device has a standard USB-A port; this is not a USB-C cable.
• Verify your serial device uses a male DB-9 connector with standard RS-232 pinout.
• Check if your specific Linux distribution requires manual driver installation, though most support FTDI chips natively.
• Confirm the physical clearance for the DB-9 connector and screws in your equipment rack or enclosure.

Buyer FAQs

The bottom line

This StarTech.com adapter is the right choice for professionals who need a stable, driver-reliable RS-232 connection for diagnostics, industrial control, or legacy serial devices. The FTDI chipset and COM retention feature specifically address the most common pain points in serial communication. Covered by the applicable manufacturer warranty.