Chen Xiao Fan wrote:

>>> Gas arrestors are one of the best device for lighten protection. 

>> And the minimum firing voltage is 80V so you need something else after
>> the gas arrestors to stop the damage.

> Oh yes. You will have your usual protection circuits in your device (TVS,
> zener, fuse, resistor, varistor, etc). That is the normal thing you need
> to take note anyway.

I think anything in the range of lightning protection has to be
multi-staged. You usually go for more robust and/or slower devices on the
outside (to pick up the high peaks of voltage and the bulk of the energy)
to more precise and/or faster devices on the inside (to get the fast peaks
and make sure the specs of the connected circuit are not exceeded).

Gerhard
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