RC Snubber - voltage spike filter

RC Snubber – Surge Suppressor for Inductive Loads

Protect your Shelly devices and improve the reliability of your installation.

Are you installing Shelly 1, 1PM, 2.5, or EM with fans, motors, or contactors? Then this component is essential.
The RC Snubber (RC damper) is designed to suppress voltage spikes generated when cutting inductive loads, preventing damage and malfunction in your smart devices.

What exactly does the RC Snubber do?

When you turn off a motor, fan, transformer, or any load with a coil, a voltage spike is generated that can damage your Shelly. The RC Snubber absorbs that spike and protects the internal relays, extending the lifespan of your home automation installation.

Compatible with:

• Shelly 1 / 1PM

• Shelly 2PM

Especially recommended if you control inductive loads using contactors.

How is it installed?

Connect it in parallel, between the Shelly relay output and the neutral.
Place it as close as possible to the inductive load (motor, fan, etc.) for maximum effectiveness.

Common applications:

• Ventilation motors

• Motorized blinds

• Air conditioning

• Washing machines and dryers

• Refrigerators and cold storage

• Transformers and ballasts

• High-voltage LED drivers

Key benefits:

• Prevents voltage spikes that can damage your Shelly devices

• Improves system performance and stability

• Simple and quick installation

• Recommended by Shelly for inductive loads

Do you need it?

If you control inductive loads with any compatible Shelly device, yes, you need it.
Always consult your Shelly manual to ensure correct installation.