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Black USB-A to DB9 serial adapter cable five feet long

Tripp Lite

Tripp Lite U209-005-COM USB-A to DB9 serial adapter cable 5 ft

SKU CH-9T16-H5BXT MPN U209-005-COM

Connects RS232 devices to a USB-A port with 230 Kbps transfer speed and automatic COM retention

  • Rated speedUSB 2.0 (up to 480 Mbit/s)
  • Connection typeUSB A to USB C
  • Connector count2
  • Connector detailsRS232 to USB Adapter Cable with COM Retention (USB-A to DB9
  • Connector genderMale to Male
  • Product typeUSB-A to DB9
  • Connect RS232 devices via USB-A port
  • Up to 230 Kbps data transfer speed
  • Automatic COM port reassignment avoids configuration
  • USB-powered with no external supply needed
  • Double shielding guards against EMI/RFI noise

USB-A to DB9 serial adapter

This five-foot cable converts a USB-A port into an RS232 DB9 serial connection for barcode scanners and other DTE devices. It uses an FTDI chipset and draws power from the USB bus so no external supply is needed. The cable works with Windows, Mac and Linux without extra drivers.

DB9 male connectors with COM retention

Male-to-male terminals lock the COM port assignment so the operating system does not reshuffle ports after a reboot. Double shielding blocks EMI and RFI noise that can corrupt serial data in industrial environments. USB 2.0 signalling supports up to 480 Mbps on the host side.

Replaces legacy onboard serial ports

The adapter delivers up to 230 Kbps, twice the throughput of a traditional motherboard COM port. It suits technicians maintaining PLCs, CNC equipment or networking gear that still rely on RS232. Buyers who need multiple simultaneous serial links or longer cable runs should consider a multi-port alternative.

How it compares

Measured against everything we stock in USB Cords & Extension Cables, at today’s prices. Recalculated every night.

Price $31.99
Pricier than about 90% of the 15,227 comparable items (median $14.99).

Specifications

Product
Brand nameTripp Lite
Model nameU209-005-COM
Product typeUSB-A to DB9
Product colorBlack
Performance
Rated speedUSB 2.0 (up to 480 Mbit/s)
Ports & slots
Connection typeUSB A to USB C
Connector count2
Connector detailsRS232 to USB Adapter Cable with COM Retention (USB-A to DB9 M/M)
Connector genderMale to Male
Size & build
Overall length5 ft (1.52 m)
Shipping weight0.11 kg
Package size122 × 109 × 33 mm

Questions about this item

What serial data rate does the U209-005-COM support on the DB9 side?

The adapter supports serial data transfer up to 230 Kbps on the DB9 connector, which is double the speed of a typical built-in serial port.

What physical space does the DB9 end of this 5 ft cable need for a secure connection?

The DB9 male connector requires a standard RS-232 female port with enough clearance for the moulded hood and thumbscrews to seat fully without strain on the cable.

How is the U209-005-COM installed, and what step do users often miss?

Plug the USB-A end into the computer; the FTDI driver installs automatically on Windows, Mac and Linux, then verify the assigned COM port in Device Manager before configuring your serial software.

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