How can I keep my relay from being loud/buzzing?

All relays ‘buzz’. A good example is the transformers for low voltage lighting in the house. When the room is quiet, you can hear the humming of the transformer or relay.


relay 40 1


But things can make it worse:


  • Ensure that the relay is mounted tight to the enclosure and the enclosure is mounted tight to the studs/walls. Any slight looseness and it will vibrate.


  • You can put some polystyrene foam between the relay and the wall. So before mounting it and screwing to the wall, apply some foam (any non-flammable foam) and screw tight to the wall. This will help prevent the transfer of the buzzing to the drywall and the rest of the wall.


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Review the installation manual before installing.