Top positive review
These things really work!
Reviewed in the United States on September 16, 2019
We have a lot of electrical storms here, and because we have devices outside connected with CAT6 cable (generator, 5Ghz dish for our internet etc.) I wanted those incoming connections to go through a surge suppressor before plugging into my network switch, even though they are also fully shielded and grounded connections. It never hurts to be save with all the electrical storms we have around here.
I bought a couple of these things back in 2015 and took the time to mount and properly ground them well. Then in 2017 I bought a couple more for additional devices, trusting that they still do the job but never really knowing since despite all the electrical storms we've had, nothing has been struck and nothing has gone out. Perhaps that in itself is a testament to these things... but I still wasn't sure if these had capability to absorb multiple hits, or if they are single use.
That changed this past weekend. We had a killer electrical storm right above our house and at the same moment we saw a massive lightning strike, the power went out for a few seconds and our internet went out and stayed out. (We get our internet from the 5Ghz dish outside from a nearby mountain since there is nothing else available in our area.)
The dish seemed okay. The POE injector was still sending power, the radio on the back still had activity and RX lights, the link on my switch port was still showing 100Mbps full duplex, but no internet. I tried everything... replacing the POE injector, rebooting the dish and even leaving the dish's radio unplugged for 24h to drain it completely. I was about to go order a new radio and then thought, "hey, why not remove the surge suppressor" even though network and power seemed to be passing through it just fine. That was it! the lightning must have caused enough of a surge to trigger it. Once I removed it and replaced it with a new one, my dish was back online.
So, here's some proof that these things actually work. Happy to buy a replacement for $23 vs. a new switch for hundreds (assuming it would have gone through to my switch... and if that's true, where would it go from there!)