IKEA Tradfri 24V transformers work with Hue

I was out shopping in IKEA this week (Milton Keynes, UK) when I happened across a few new additions to the Tradfri range of smart lighting: LED drivers!

  • Low output 24V transformer (10W) - 503.561.87: £12
  • High output 24V transformer (30W) - 603.426.45: £?? (can't remember if it was £15 or £18)
  • Power cable with plug and inline switch - £3
  • Daisy chain connecting power cable - £2

There is no information in store about these items, but on closer inspection I figured out that they are designed as a drop-in replacement for Ikea's Ansluta power modules. This means they drive LED lighting from the NorrflyOmlopp, Irsta and Urshult range of strip, puck and cabinet lights.

I bought three 10W transformers and a few Norrfly lights to test them.

In retrospect I should have bought Omlopp as I intend to replace my kitchen cabinet lights (LEDs with integrated 230V power, which I have previously fitted with Sonoff devices for smart control). The Norrfly are intended for wardrobes.

How they work

The transformers have 24V variable-voltage outputs (the low power version I bought has 3 outputs). Whereas the Ansluta range of LED drivers are compatible with the Ansluta wireless dimmers (which lack any smart app and home automation interface), these versions integrate with the Tradfri range of dimmers and gateway. Using either the remote controls or the Tradfri app to dim or turn off the lights varies the output voltage.

Hue Compatibility

Yes, they work with Hue. Each transformer appears in the Hue app as dimmable bulbs. The on/off and dimming controls work correctly. The bulb metadata show as model "TRADFRI transformer 10W" with software version "1.2.245". I didn't bother to connect them to the Tradfri gateway to check for firmware updates, I just connected them straight away to the Hue hub.

To connect to the Hue hub, this is what I did:

  1. Connect up a LED strip to the transformer
  2. Connect the transformer to mains power close to the Hue hub - the light will turn on
  3. Start a new light search in the Hue app
  4. Hold down the reset/pair button on the transformer (you can use use a pin)
  5. Keep it held until it appeared in the app - the light will dim, brighten, and flash.

Note that first I had initiated a touchlink (using the Hue API) as I assumed it would be necessary, but it turns out it wasn't for the second and third transfomers I added.

Further uses / Caveats

It's possible these could also be used to power other devices, but be aware of some caveats:

  • LED drivers typically lack the output power profile to drive variable loads such as motors, I wouldn't advise trying this
  • They output upto 24V voltage
  • The transformers appear as dimmable lights. Turning the LEDs on and off (at least via Hue) is not done by instantly switching on/off but by dimming (varying the voltage). This may affect how it behaves with relays.

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