Feature: Connectors & Interconnections
Deceptively simple: How spring-loaded connectors future-proof electrical systems
By David Draper, Product Manager – Interconnection, WAGO UK & Ireland E
lectrical systems stand or fall on the reliability of their connections. Because even the most advanced machine or solution will fail if wires move out of
position. Traditional connections, which rely on
tightened screws to keep wires in place, come with inherent limitations. They can loosen over time, require periodic maintenance and can be difficult and frustrating to install. Spring-loaded electrical connections,
however, are different. By maintaining constant pressure on the wire, they offer maintenance-free reliability and enhanced safety. Tool-free, lever- actuated connectors, such as WAGO’s 221 Series Splicing Connectors, are also quick and easy to use, streamlining installation time. Here, we explore the advantages of spring-loaded connections and explain
22 May 2025
www.electronicsworld.co.uk
why they are fast becoming the method of choice in modern electrical design.
The problem with traditional methods Electrical connections are the fundamental building blocks of any electrical system. By linking wires, circuits and components, they enable the flow of electricity to devices, machines and infrastructure. The reliability and quality of these
connections will directly impact the efficiency, safety and longevity of electrical systems, after all, connection failure equals system failure. Traditionally, the industry has
used screw-in connectors, but they have important limitations. They can become loose over time, particularly in environments with regular vibrations or temperature shifts. As such, they need regular
maintenance, which involves time-
consuming, labour-intensive, screw-by- screw tightening. And if this is carried out incorrectly, and connections are either under- or overtightened, it can result in poor electrical contact or damage the wire. This can compromise overall reliability of the system.
Spring-loaded: The modern solution Modern solutions, like those provided by WAGO, use spring tension to secure the wire. This strong contact, even if the wire or terminal shifts, results in consistent conductivity and minimises the risks of disconnections due to mechanical stress or temperature changes. Unlike screw-hold connections,
which can loosen over time due to vibration, thermal cycling, or material creep, spring-loaded connections continuously adjust. This significantly reduces the risk
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