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USB Isolator

  • Part: UISO3
  • In Stock


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If you need to isolate your USB device from your computer this USB Isolator is an effective and easy solution to ensure total isolation between your USB devices and your computer. This USB isolator separates both the data lines and power supply from your computer, fully protecting your USB devices and data signals against electrical noise, high voltage spikes, surges and ground loops for up to 3000V, which otherwise easily could damage your equipment.

Isolation is achieved by the ADUM4160 from Analog Devices, which efficiently protects your equipment against all types of high voltage spikes, surges and static electricity. The ADUM4160 makes this USB isolator compatible with both low speed (1.5M) and high speed (12M). The speed can manually be selected by a jumper on the side of the isolator.

Power is provided from the computer's USB port, however an external power supply can be connected to the isolator if your USB device has a high current consumption (400mA or more). Adding an external 5V power supply will ensure that the connected USB device(s) will get sufficient power.
Power is isolated by a 2 watt regulated DC-DC converter with an isolation of 3000V.

A LED indication light indicates when the isolator is turned on.

usb isolator diagram

Overall features
  • Fully isolated USB isolator
  • Powered by USB port
  • 3000V isolation
  • Low speed and High speed supported
  • Data and power wires fully isolated from host
  • External power can be added if required

Part number UISO3
Operating system Transparent to operating system, no drivers needed.
Power requirements 4.9V-5.1V provided by USB port. Option for external power supply.
Output current Up to 400mA by USB port power, higher with external power supply.
Compatibility USB 1.1 (1.5Mbps) and USB 2.0 (12Mbps).
Interfaces USB device side: Type A female
USB PC side: Type B female
Isolation Voltage 3000V
USB isolator ADUM4160
DC isolator IF0505S-2W
ESD Protection 15 KV
Operating Temp. -40 to 85C
Dimensions 70mm x 90mm x 27mm
Indication lights Power
Warranty 1 year limited warranty

Read the Review
Date Added: 09/23/2015 by Mark Hubelbank
5 of 5 Stars5 of 5 Stars
We are using the isolator for testing a high impedance signal recorder. It seems to have more than 1...

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Date Added: 11/29/2014 by Dave Nielsen
5 of 5 Stars5 of 5 Stars
Highly recommended! We are using this usb isolator for our sensitive controllers and they do a great...

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Date Added: 09/05/2011 by Dave Ketner
5 of 5 Stars5 of 5 Stars
works fine. compared to most other usb isolators which cost at least double as much this one works p...

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Quick Tip!

The USB Isolator

A USB isolator is highly recommended when you plan to connect a sensitive or expensive USB device to your computers USB port, if you suspect that there are possibilities for voltage spikes or surges in your USB cable or if you need to use an extended USB cable. These are situations where a USB isolator will protect your computer and USB device against most kinds of electrical noise, voltage spikes, surges and ground loops.

A standard USB isolator is very easy to use, simply connect it to your computers USB port and then connect your USB device to the isolator. Some USB isolators are powered by your computers USB port, other isolators are powered by an external power supply. We highly recommend a USB isolator which uses an external power supply. By using an external power supply the isolator not only isolates the data wires but also the power wires in the USB cable. Isolating the power wires gives better protection of you computer and USB device since it eliminates the chance for damage by voltage spikes in the power supply.

Another important feature of a USB isolator is that it should be compatible with both USB 1.1 and USB 2.0 device, this gives you the best compatibility for most devices. Most isolators uses optical isolators to isolate the data signals. Along with the USB signal processor, the optical isolator is the main components in a USB isolator. When choosing an isolator we recommend a USB isolator with brand name processor chips such as Toshiba or Maxim.

For alternative solutions please see our selection of USB serial adapters.