Theben Unveils DIMAX 540 APP B Micromodule

Theben will present its new DIMAX 540 APP B micromodule at the IBS trade fair (Booth E17-E20). Designed to meet the challenges of electrical renovation, this ultra-compact dimmer integrates directly into existing flush-mounted boxes thanks to its reduced dimensions (25.5 × 26.4 × 9.4 mm, barely larger than a coin). Its key feature is its neutral-free operation, using only the phase and the lamp wire, which makes it possible to modernize lighting in older buildings without requiring heavy wiring work or wall damage.

Bluetooth Mesh Connectivity and Local Privacy
The module relies on Bluetooth^® Mesh communication technology, which creates a robust and interoperable local network where each device relays the signal. Users can control lighting conventionally via existing push-buttons or using an intuitive mobile application. The system offers advanced features such as memory for the last lighting level, customized scenario configuration, over-the-air (OTA) updates, and programming via an integrated astro clock to adapt to sunrise and sunset. Capable of automatically detecting the load type (LED, halogen, or incandescent), the DIMAX 540 APP B is protected against overcurrent, short circuits, and overheating. The solution also stands out for its 100% local operation, without cloud dependency or account creation, thereby guaranteeing absolute confidentiality of user data.

Additional Context: Technological Background and Market Dynamics
This section provides technological and market background not explicitly detailed in the original release.

In older European residential and tertiary buildings, wall switch flush boxes generally lack a neutral wire (which runs directly from the electrical panel to the bulb). Historically, this represented a major obstacle for installing home automation controls, as most smart switches or dimmers require a continuous closed circuit (phase and neutral) to power their own electronics when the light is turned off. By using ultra-low-power components capable of "stealing" a micro-current through the lamp wire, "neutral-free" dimmers solve this problem, sparing electricians from having to pull new cables through existing conduits. Furthermore, the choice of the Bluetooth^® Mesh standard reflects a growing industry trend toward decentralized architectures. Unlike conventional Wi-Fi which depends on a central router, each node in a Mesh network extends the range and resilience of the signal, which is ideal for covering large commercial buildings without requiring complex IT infrastructure or home automation gateways (hubs).

Edited by Lekshman Ramdas, Induportals editor – adapted by AI.

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