10c4:8508 — RS485 Adapter

Silicon Labs

Vendor ID: 10c4
Product ID: 8508
Combined: 10c4:8508
Decimal: 4292:34056

What is this device?

This is the USB identifier for a RS485 Adapter manufactured by Silicon Labs. The vendor ID 10c4 is registered to Silicon Labs with the USB Implementers Forum, and 8508 is the product ID that Silicon Labs assigned to this particular model. When you run lsusb on Linux, this device appears as 10c4:8508 Silicon Labs RS485 Adapter.

How to identify it on your system

Linux

$ lsusb
Bus 001 Device 004: ID 10c4:8508 Silicon Labs RS485 Adapter

You can filter directly with lsusb -d 10c4:8508, or get the full descriptor dump with lsusb -v -d 10c4:8508. Kernel messages from dmesg show the same pair as idVendor=10c4, idProduct=8508.

Windows

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

USB\VID_10C4&PID_8508
USB\VID_10C4&PID_8508&REV_0100

From PowerShell: Get-PnpDevice | Where-Object InstanceId -match "VID_10C4&PID_8508"

macOS

$ system_profiler SPUSBDataType
    RS485 Adapter:
      Product ID: 0x8508
      Vendor ID: 0x10c4  (Silicon Labs)

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. Silicon Labs official support →

Raw usb.ids entry

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

10c4  Silicon Labs
	8508  RS485 Adapter

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