We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Black USB-A to DB9 serial converter cable, three feet long

Monoprice Inc.

Monoprice Inc. 3726 USB to Serial Converter Cable USB A to DB9 DE9 3ft Prolific PL-2303

SKU CH-09JM-K9MKY MPN 3726

Connects RS-232 devices to a USB 2.0 port at up to 230 Kbps using the Prolific PL-2303 chipset

  • Cable Length0 ft.
  • Weight0.25
  • Connect legacy serial gear via modern USB 2.0 port
  • Prolific PL-2303 chipset enables up to 230 Kbps transfer
  • Automatic handshake mode keeps data flowing without manual setup
  • Works with Windows 98 through 7 (32/64 bit), Mac 8.6+, Linux
  • Three-foot cable adds flexibility for desktop or field use

USB-to-Serial converter cable for legacy RS-232

The Monoprice 3726 connects an RS-232 serial device to a USB 2.0 port using a Prolific PL-2303 chipset. It provides a DE9 male connector on one end and a USB A male connector on the other. The cable supports data rates up to 230 Kbps and automatic handshake mode. It is intended for users who need to add a serial port to a modern PC or free an existing RS-232 port for other equipment.

Driver-dependent installation across Windows.

Installation requires the correct Prolific PL-2303 driver for the host operating system. Supported systems include Windows 98/98SE/ME/2000/XP and Windows 7 in both 32 and 64 bit versions, Mac 8.6 and higher, and Linux. Common issues arise when the operating system loads a generic or unsigned driver that breaks communication with the chipset. Verifying the active driver version against the Prolific release usually resolves the problem.

Prolific PL-2303 chipset determines compatibility

The single specification that decides whether this cable works is the Prolific PL-2303 chipset. Only devices and drivers written for this chipset will communicate reliably through the converter. Buyers whose hardware demands a different USB-to-serial bridge, such as an FTDI or Silicon Labs implementation, cannot use this cable. The chipset also governs support for remote wake-up and power management features.

Highlights

  • Connect legacy serial gear via modern USB 2.0 port
  • Prolific PL-2303 chipset enables up to 230 Kbps transfer
  • Automatic handshake mode keeps data flowing without manual setup
  • Works with Windows 98 through 7 (32/64 bit), Mac 8.6+, Linux
  • Three-foot cable adds flexibility for desktop or field use

Specifications

BrandMonoprice
Series103726
Model103726
Part Number3726
Cable Length0 ft.
Weight0.25
Shipping weight0.23 kg
Package size178 × 51 × 13 mm

Questions about this item

How can I verify the PL-2303 chipset is recognised after plugging in the 3 ft cable?

Open Device Manager on Windows or run dmesg on Linux; the adapter should appear as a Prolific USB-to-Serial COM port using the PL-2303 driver.

What connectors are on the cable and do I need a separate gender changer?

The cable has a USB A male plug on one end and a DE9 male serial connector on the other; no extra adapter is required for a standard DB9 female port.

Which operating systems does the 3726 model support out of the box?

Windows 98, 98SE, ME, 2000, XP, and 7 in both 32-bit and 64-bit versions, Mac OS 8.6 and later, plus Linux kernels with the PL-2303 driver included.

New to this? Which coin should you pay with — what to check, what it costs to pay, and what is never asked for.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.