Why do I need a snubber for my LP92 or relay?
This article explains the purpose and benefits of using a snubber with Lightwave LP92 or relay devices. It combines a practical explanation with enough technical detail to support both general users and professional installers. Installation guidance is also included.
A snubber is a small electronic component used to improve the reliability of your Lightwave LP92 Heating Switch or other relay-controlled circuits, particularly when dealing with low-power loads like LED lighting or motorised blinds.
🔍 What Does a Snubber Do?
When certain types of loads (like LEDs or low-voltage transformers) are switched off, they can release a small electrical pulse or residual current. This can confuse the relay or dimmer, causing:
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Flickering
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Lights that stay dimly lit
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Devices not responding correctly
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“Ghosting” on low-load circuits
A snubber solves this by absorbing that unwanted electrical energy. It acts as a resistor-capacitor (RC) network, suppressing voltage spikes and providing a safe discharge path for any leakage current. This keeps the circuit stable and helps the relay or dimmer correctly detect when a load is present.
🛠️ How to Install a Snubber
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Connect the snubber across Live and Neutral on the load side of the circuit.
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Install it in parallel with the connected device (e.g., LED bulbs, blinds).
⚠️ Always isolate the power supply before installation and consult a qualified electrician if needed.