050d:1203 — F5U120-PC Serial Port (Belkin Components)

What is this device?

This is the USB identifier for a F5U120-PC Serial Port manufactured by Belkin Components. The vendor ID 050d is registered to Belkin Components with the USB Implementers Forum, and 1203 is the product ID that Belkin Components assigned to this particular model. When you run lsusb on Linux, this device appears as 050d:1203 Belkin Components F5U120-PC Serial Port.

How to identify it on your system

Linux

$ lsusb
Bus 001 Device 004: ID 050d:1203 Belkin Components F5U120-PC Serial Port

You can filter directly with lsusb -d 050d:1203, or get the full descriptor dump with lsusb -v -d 050d:1203. Kernel messages from dmesg show the same pair as idVendor=050d, idProduct=1203.

Windows

In Device Manager, open the device, go to Details → Hardware Ids. This device reports:

USB\VID_050D&PID_1203
USB\VID_050D&PID_1203&REV_0100

From PowerShell: Get-PnpDevice | Where-Object InstanceId -match "VID_050D&PID_1203"

macOS

$ system_profiler SPUSBDataType
    F5U120-PC Serial Port:
      Product ID: 0x1203
      Vendor ID: 0x050d  (Belkin Components)

Driver help

Having driver issues with this device? Most USB devices are handled by a generic class driver; if yours shows up as an unknown device, confirm the ID above first, then check the manufacturer's downloads page.

Raw usb.ids entry

The exact lines this page is generated from, in the upstream source file:

050d  Belkin Components
	1203  F5U120-PC Serial Port

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