Inside an African lightning protector - and candy

It's cheap - it does work - but would you trust this in your home?

This voltage transient shunting device was sent by Frankhe for our exploration. He also sent some candy and some combined metal oxide varistor and gas discharge tube devices.

I'm used to seeing surge protection devices that have a thermal safety device, as the varistor disks gradually break down and can start to pass current continually at lower voltages, resulting in heat.

The internal construction makes me wonder if the MOV/VDR disk was supposed to be sandwiched between the two copper electrodes. Or if those electrodes were designed to go into a ceramic ring to act as a spark gap.


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