Hi
I have opened up an expensive mains surge protection device to see what was inside. I was expecting to see VDR , GAS and transient diodes.
But no! this was inside (see pic) and the surface has been filed off.
It looks like a ceramic transient device but I cant be sure, ive trawled the internet and cant find anything like it.
Its across L-N and no other components are on the pcb.
So any help on what it actually is and where I can get some from would be appreciated .
Brent
I have opened up an expensive mains surge protection device to see what was inside. I was expecting to see VDR , GAS and transient diodes.
But no! this was inside (see pic) and the surface has been filed off.
It looks like a ceramic transient device but I cant be sure, ive trawled the internet and cant find anything like it.
Its across L-N and no other components are on the pcb.
So any help on what it actually is and where I can get some from would be appreciated .
Brent
An externally hosted image should be here but it was not working when we last tested it.
I get an error message... "could not open the page “http://img208.imageshack.us/img208/2514/megaclampou3.jpg” because the server stopped responding." 
powerbecker said:
Electrically it measures open circuit both ways. And on a capacitance test measures roughly 1nF.
All surge devices measure open circuit and the go short or low ohm when a voltage is exeeded.
The component is fully encapsulated and I don't fancy trying to break it as a new one is £130
Brent
powerbecker said:
Russ Andrew says it does not deteriorate with age and is hundreds of times better than his super clamp which comprises a MOV and a Transient diode (SAD).
Here is a link
Mega Clamp
Brent
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