When shopping for a surge suppressor, look for the following three things. A UL 1449 rating, ensuring the suppressor can reduce a 6,000V surge, for example, to a harmless 330 to 400V one. An internal fuse, allowing suppressors to break the circuit if the surge of power last longer than what they are designed to handle, preventing the surge from reaching connected devices. A solid warranty, covering the cost of any damage to the equipment connected to the suppressor. There are also a few extra features that you might want to check for, depending on your equipment.
Noise filters eliminate electromagnetic interference.
While it is not necessary to purchase surge suppressors for items like toasters and blenders, or even for refrigerators and air conditioners which usually come with their own protection, you should consider purchasing suppressors for your expensive electronic equipment. It will save you a lot of costly repairs in the event that a surge does occur.