Finder Series 26 and 27 Compact Step Relays

Centralized lighting management in modern buildings requires discreet switching devices capable of fitting into tight spaces without generating noise pollution. To meet this installation constraint, Finder introduces the new Series 26 and 27 step relays, designed to offer reliable, compact, and silent switching.

Engineering Context and Operational Challenges
In residential and commercial environments such as hotels, corridors, or large living spaces, controlling multiple light sources from different command points requires high-performance electromechanical relays. Electrical designers often face limited space in flush-mounting or junction boxes, as well as the acoustic annoyance caused by the characteristic clicking of traditional relays during coil activation.

Technical Explanation and Operating Principle
Electromechanical step relays operate by changing the state of their contacts with each electrical impulse received, making it possible to control a lighting circuit via multiple pushbuttons. The Series 26 is distinguished by an architecture that electrically isolates the coil circuit from the contact circuit, thus offering increased flexibility to separate the control and power voltages. Conversely, the Series 27 is designed with a common power supply to simplify wiring when both circuits share the same voltage source. The devices use cage terminals to secure electrical connections and feature cadmium-free contacts, supporting a 10A output load on one or two contacts. These components are available in seven versions offering different operating sequences to adapt to the switching logic required by the network.

Technical Specifications and Product Relevance
The evolution of this historic Finder range translates to a significant reduction in physical footprint and optimized acoustic attenuation for user comfort. Alternating current (AC) coils are available in several operating voltages, notably 12, 24, 110, or 230 V, ensuring broad compatibility with standard installations. Furthermore, the Series 27 includes the advanced 27.2x EVO version. This specific model incorporates a coil power limiter and allows the simultaneous connection of up to 25 illuminated pushbuttons, a frequent requirement in large-scale commercial infrastructures. Mounting is done directly in a flush-mounting or junction box, facilitating fast and functional deployments.

Additional Context
This section details technical specifications and competitive comparative analysis that are not included in the original product announcement.

In the low-voltage electrical installation sector, the transition to LED lighting has altered the load profiles borne by control devices. The inrush currents generated by capacitive drivers demand robust contact materials, which justifies the use of cadmium-free solutions that are more resistant to thermal degradation and comply with global environmental directives. Moreover, power limiters integrated into the control coils, like those present in the EVO series, represent an essential technical safety feature. They reduce overall energy consumption and prevent overheating of the coil in the event of a prolonged mechanical blockage of a pushbutton on the control circuit, thereby significantly increasing the lifespan of the electrical installation.

Edited by Maria Brueva, Induportals editorial team – adapted by AI.

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