Theben Dimax 540 APP B LED Mini Dimmer WiFi

Theben DIMAX 540 APP B — 150W Flush-Mounted Bluetooth Smart Dimmer for LED And Incandescent Loads. Designed to sit behind a retractive switch, it’s a compact retrofit solution for upgrading lighting control in tight back boxes — with no neutral conductor required.

Retrofit Control Behind A Retractive Switch

Install the DIMAX 540 APP B behind a standard push button (retractive switch) and control lighting with simple presses. Short press toggles on/off, press-and-hold dims smoothly up or down, and a double-press jumps straight to 100% brightness for instant full light when needed.

Intelligent Dimming That Adapts To Real LED Loads

The adjustable minimum brightness helps prevent LED flicker and drop-out at low levels, while the memory function restores the last set light level the next time it’s switched on. An extended dimming speed makes it easier to dial in the exact level — taking roughly 5 seconds to move through the full 0–100% range.

Bluetooth App Setup, Mesh Networking And Two-Way Convenience

Commission and control via push button or the Theben 540 Series app, then expand with Bluetooth Mesh for group control, scenes and astro programmes. It also supports two-way circuits and multiple push buttons over cable runs up to 100m — ideal for refurbishments and larger domestic or commercial spaces.

Protection Built In For Long-Term Reliability

Fully encapsulated electronics with temperature, overcurrent and short-circuit protection helps keep installations dependable over time, even where loads and conditions vary.

Key Features of the Theben DIMAX 540 APP B 5400230 Include:

• Retrofit Intelligent Dimmer For Installation Behind A Retractive (Momentary) Switch
• Short Press Toggle On/Off For Simple Daily Control
• Press And Hold Dims Up Or Down Smoothly Across The Range
• Double-Press Switches Directly To 100% Brightness For Instant Full Light
• Adjustable Minimum Brightness Helps Prevent LED Flicker And Drop-Out
• Memory Function Restores The Last Set Light Level On Switch-On
• Bluetooth App And Push-Button Control For Flexible Commissioning And Operation
• Bluetooth Mesh Networking Enables Group Control, Scenes And Astro Programmes
• No Neutral Conductor Required For Straightforward Retrofit Installations
• Suitable For Two-Way Circuits And Multiple Push Buttons Up To 100m Cable Length
• Integrated Temperature, Overcurrent And Short-Circuit Protection For Reliability
• Ambient Operating Temperature -10°C To +45°C
• Height: 32.7mm
• Width: 26.6mm
• Depth: 9.6mm

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