166a:0401 — C-Bus Architectural Dimmer

This is the USB identifier for a C-Bus Architectural Dimmer manufactured by Clipsal. The vendor ID 166a is registered to Clipsal with the USB Implementers Forum, and 0401 is the product ID that Clipsal assigned to this particular model. When you run lsusb on Linux, this device appears as 166a:0401 Clipsal C-Bus Architectural Dimmer.

Linux

$ lsusb
Bus 001 Device 004: ID 166a:0401 Clipsal C-Bus Architectural Dimmer

You can filter directly with lsusb -d 166a:0401, or get the full descriptor dump with lsusb -v -d 166a:0401. Kernel messages from dmesg show the same pair as idVendor=166a, idProduct=0401.

Windows

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

USB\VID_166A&PID_0401
USB\VID_166A&PID_0401&REV_0100

From PowerShell: Get-PnpDevice | Where-Object InstanceId -match "VID_166A&PID_0401"

macOS

$ system_profiler SPUSBDataType
    C-Bus Architectural Dimmer:
      Product ID: 0x0401
      Vendor ID: 0x166a  (Clipsal)

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.

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

166a  Clipsal
	0401  C-Bus Architectural Dimmer

• 166a:0301 C-Bus Wireless PC Interface
• 166a:0303 C-Bus interface
• 166a:0304 C-Bus Black and White Touchscreen
• 166a:0305 C-Bus Spectrum Colour Touchscreen

See all 7 devices from Clipsal →