Tripp Lite Keyspan USB to Serial Adapter, USB-A Male to DB9 RS232 Male, 3 ft. (0.91 m), TAA

The Tripp Lite USA-19HS is a USB to Serial adapter that lets you bridge a computer’s USB-A port to any device that relies on a DB9 RS232 serial connection. It is a straightforward way to keep older or specialized hardware—such as routers, switches, barcode scanners, and laboratory instruments—working with modern laptops and desktops that no longer include a native serial port.

Many technicians, network administrators, and field service professionals carry this adapter because it moves data at speeds up to 230 Kbps, which is roughly twice as fast as the rate delivered by most built-in serial ports. This performance helps firmware uploads, console sessions, and data logging finish sooner, so you spend less time waiting and more time working.

Setup is simple. The detachable 3 ft cable plugs into any USB-A port, the operating system recognizes the adapter automatically on most Windows and macOS versions, and no external power brick is required. If you do need the latest driver for a 32- or 64-bit system, Tripp Lite hosts an up-to-date download, and the entire process takes only minutes.

A compact build that travels easily in a toolkit and a lightweight design that will not weigh down your bag make the USA-19HS ideal for on-site service calls. TAA compliance allows procurement by federal agencies and contractors, while a 3-year limited warranty provides long-term confidence.

• Creates a direct link between a USB-A computer port and a DB9 RS232 serial device
• Supports data transfer rates up to 230 Kbps for quick console access and file moves
• Works with current and legacy versions of Windows and macOS, in both 32- and 64-bit environments
• Includes a detachable 3 ft USB cable for flexible placement
• Operates entirely from USB bus power, so no external supply is needed
• TAA-compliant for use in federal procurement projects
• Backed by a 3-year limited Tripp Lite warranty