The Snubber Shelly RC is an accessory for Shelly relays and is recommended for use with inductive devices such as motors, fans, vacuum cleaners, washing machines, and power transformers (power adapters for LED, laptop, TV).

These devices can cause voltage spikes in the electrical network when turned on/off, if the voltage fluctuations are not properly managed by the manufacturers, which can cause problems in the electrical network. 

One such problem can be, for example, the random turning on/off and restarting of Shelly relays.

To avoid such electrical problems, a Shelly RC snubber (0.1 μF / 100 Ω / 1 / 2W / 600 V AC) should be connected between the voltage (L Out) and the Neutral (N) of the electrical circuit.