Preparing for electronica 2026: Why PCB-to-Panel Light Guides Matter More in High-Density Electronics

As electronics become more compact and functionally integrated, reliable LED indication from PCB to front panel is becoming increasingly important in industrial control, power systems, networking equipment and embedded electronics.

electronica 2026 will take place in Munich from November 10 to 13, bringing together companies across electronic components, embedded systems, power electronics, automation, connectivity and related technologies.

For equipment manufacturers, one small component continues to play an important role in product usability and front-panel design: the PCB-to-panel light guide.

In many industrial and electronic products, LEDs are mounted directly on the PCB, while the visible indication point is located several millimeters or even several centimeters away on the front panel.

A properly designed light guide transfers the optical signal from the LED to the required panel position while helping maintain a clean mechanical structure, reliable alignment and clear visual indication.

As equipment becomes smaller and more integrated, front panels often need to display more status information within limited space.

This creates several design challenges:

Multi-position light guides with independent optical channels can help reduce light interference between neighboring indicators while simplifying assembly.

Fine-pitch designs, including 2.54 mm configurations, are especially useful where several LED indicators must be arranged in a compact space.

Another important requirement in industrial electronics is replacement sourcing. Many equipment manufacturers already use established light pipe components from existing suppliers.

However, changes in cost, lead time, product availability or mechanical design can create demand for compatible alternatives.

Based on this information, it is possible to evaluate whether an existing standard light guide can be used or whether a customized optical and mechanical design is required.

At TOPTEN, our Light Guide development currently focuses on PCB-to-panel indication solutions for industrial and electronic equipment.

If your current equipment uses a light guide from suppliers such as Mentor, Bivar, VCC or another existing source, an initial evaluation can usually begin with a part number, drawing or application information.

The objective is not simply to copy an existing component, but to determine whether the optical path, dimensions, assembly method and application requirements can be matched or improved.