Tripp Lite
1111 W. 35th Street
Chicago, IL 60609
+1 (773) 869-1774
+1 (773) 869-1329

USB to Serial Adapter Cable (USB-A to DB25 M/M), 5 ft.

Two connection options in a single cable. Connect devices with a DB9 or DB25 serial port, such as modems, digital cameras, PDAs and ISDN terminals, to the USB Type-A port on your computer or laptop.
  • 5 ft. cable length
  • No external power is required
  • Compatible with Windows, Mac and Linux computers, and Android tablets / phones (See System Requirements)
  • Need drivers? Click on the Support Page link on the left
  • 3-year limited warranty

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If you need to connect a PDA, digital camera, modem or an ISDN terminal with a serial port to your laptop or tablet, then Tripp Lite's U209-005-DB25 USB-to-Serial Cable Adapter is a great choice. The U209-005-DB25 allows you to connect legacy RS232 peripherals with either a 9-pin DB9 or 25-pin DB25 connector to your computer's USB port. The U209-005-DB25 comes with USB A (Male) and DB9 (Male) connectors; the included DB9-to-DB25 cable adapter can be inserted onto the DB9 connector for use in USB-to-DB25 (M/M) connections. The cable is plug-and-play and requires no external power. The U209-005-DB25 supports data transfer rates up to 230 kbps and has a 5 ft. overall length. It is compatible with Windows, Mac and Linux operating systems, as well as Android tablets / phones with a USB Host Mode (OTG) cable (Tripp Lite U052-06N) and OS version 3.2 and above.


  • Connect a RS232 serial device to the USB port on your computer
  • Connectors: USB-A (M); DB25 (M); DB9 (M)
  • No external power is required
  • Supports data transfer rates up to 230 kbps
  • Premium double-shielded cable with gold-plated contacts, tinned copper braid and an aluminum Mylar foil shield that eliminates cross-talk and reduces EMI/RFI interference
  • Compatible with Windows, Mac and Linux computers
  • Compatible with Android tablets / phones with USB Host Mode (OTG) support and OS version 3.2 and above

System Requirements

  • Compatible with Windows 2000, XP, Server 2003, Vista, 7, Server 2008, 8, 8.1, Server 2012, and 10
  • Compatible with Mac OS X 10.6 through 10.12
  • Compatible with Linux Redhat 7.3, 8.0 and 9.0 (Linux Kernel 2.4.31 and above; already includes built-in drivers)
  • Android devices will require a USB Host Mode (OTG) cable (Tripp Lite's U052-06N) to connect the U209-005-DB25 to the device.

Package Includes

  • U209-005-DB25 USB-to-Serial Adapter Cable
  • DB9-to-DB25 adapter
  • Owner’s Manual
RoHS compliant


UPC Code037332184757
Cable Length (ft.)5
Shipping Dimensions (hwd / in.)1.70 x 4.70 x 4.80
Shipping Weight (lbs.)0.40
Side A - Connector 1USB A (MALE)
Side B - Connector 1DB9 (MALE)
Side B - Connector 2DB25 (MALE)
TechnologyDB25; Serial (RS232); USB
Product Warranty Period (Worldwide)3-year limited warranty


USB, Lightning & FireWire

  Model Number Description
USA-19HS | USB, Lightning & FireWire USA-19HS USB-A to Serial DB9 RS232 Adapter Cable - 3 ft. Keyspan, High-Speed (M/M), TAA
USA-49WG | USB, Lightning & FireWire USA-49WG USB-A to Serial Adapter Hub (DB9) - Keyspan, High-Speed (M/M), 4-Port

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+1 (773) 869-1774

Mon - Fri: 8 AM - 5:30 PM CST
+1 (773) 869-1234

Tripp Lite
1111 West 35th Street
Chicago, Illinois 60609
United States

+1 (773) 869-1111 Main
1 773.869.1329 Fax

Business Hours
8 AM - 5:30 PM CST

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Need help with your purchase?
We're always available to help with questions, including product selection, sizing, installation and product customization. Call us at +1 (773) 869-1774 or email