DIMAX 540 plus B LED Mini Dimmer. As seen on eFIXX!

Looking for a reliable, flicker-free dimming solution for your next retrofit or lighting upgrade? The DIMAX 540 LED Mini Dimmer from Theben has been turning heads, having featured on eFIXX.

But what makes the DIMAX 540 such a great choice for electricians?

Compact but Capable

Designed with modern installations in mind, the DIMAX 540 is ideal for retrofit scenarios, offering leading-edge and trailing-edge dimming in a single, compact unit. It fits easily behind standard switches, making it perfect for upgrades where space is limited but reliability is non-negotiable.

Whether you’re working in residential properties, commercial refurbishments, or listed buildings where cable runs can’t be touched, this little dimmer gets the job done, cleanly and compliantly.

Flicker-Free Performance

One of the most common frustrations with LED dimming is flicker or limited dimming range. The DIMAX 540 solves this with intelligent load detection and automatic calibration, ensuring smooth operation from as little as 2W. That means no more customer call-backs for buzzing lamps or dimmers that don’t dim properly.

It’s also short-circuit and overload protected, with thermal monitoring built in – giving you peace of mind on every install.

No Neutral? No Problem.

The DIMAX 540 works with or without a neutral conductor, making it even more versatile for older properties and one-wire installations. It’s an ideal solution when you want to offer customers dimmable LED upgrades without rewiring.

Installer-Tested, eFIXX Approved

As featured on eFIXX, one of the UK’s leading platforms for electrical professionals, the DIMAX 540 has already had the installer seal of approval. Easy to configure, adaptable to a wide range of loads, and built with the reliability you expect from Theben – it’s a small product that solves big problems.

“We liked the size of it, the fact that it worked without a neutral, and how well it performed with a range of LEDs… It’s one of those products you keep in the van because you know it’ll just work.” – eFIXX review

Where to Use It

  • LED retrofits in domestic and commercial properties

  • Upgrades in listed or heritage buildings

  • Smart-ready lighting projects with existing wiring

  • Anywhere space is tight and performance matters

Want to try it yourself?


The DIMAX 540 is available now through your usual electrical wholesaler. 

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