Best Surge Protector for TV & Gaming Consoles: Top Company & Product Recommendations

Maybe someone has experience with an overvoltage thyristor system that blows a fuse, is it faster than varistors?

Sure the thyristor systems are faster. However, you have to manually delete it, which can be a pain. And it doesn't necessarily blow a fuse. Usually, such thyristor systems were installed in power supplies in which, after the stabilization block failures, the powered equipment was destroyed. In such power supplies the fuses were blown. Still, it's still a great security feature.

Probably the cost, the varistor is many times cheaper so it is used.

Yes, the varistor is cheaper but much slower. Because the voltage increases linearly and must exceed the value of the varistor, which depends on the temperature. Besides, the spread of parameters is quite large.
As for cost, thyristors are currently not expensive. As for overvoltage protections, there are also Transiles.

cooltygrysek wrote:

Such strips are no security. It can do more harm than good.

You mean R-20F or surge protectors?

I mean any type of extension cord or splitter that is called anti-surge protection. As for the R-20F, it is an inflection because the housing likes to fall apart. I personally saw at my neighbor's. Such protections are ineffective because they have built-in low-energy varistors. Switch-mode power supplies or converters in most household appliances do just as well or even better. With these strips or splitters it's the same as with drugs, most of them are placebos. As I wrote above, to protect against the effects of high-energy surges, installation lightning arresters, surge arresters with RLC filters, or eliminators of high-energy pins appearing in the power grid are installed. Such protections cost a little, and they are mounted on the fuse board as the first before the main protections or differential switches.