Author Topic: TVS Diode for Surge Protector  (Read 376 times)

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Offline Wookie555

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TVS Diode for Surge Protector
« on: August 30, 2019, 01:01:36 pm »
I'm looking at making a DIN mounted surge protector for 240VAC and I found a TVS diode that seems to fit the bill.
Specifically, PTVS10-380C-TH which is rated for 10kA @ 8/20 μs with a Repetitive Standoff Voltage of 380V.

It costs $139 which is only slightly higher than a comparable MOV based unit.

The fact that there aren't existing commercially available TVS suppressors units available in this power range makes me a little nervous, especially when it seems so clear cut.

Is this feasible?
And should I be running an MOV in parallel?
 

Offline David Hess

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Re: TVS Diode for Surge Protector
« Reply #1 on: August 30, 2019, 04:18:06 pm »
It is feasible but for a given capacity, a TVS is more expensive than a MOV simply due to their construction differences and materials and I think this explains the difference in popularity.  The TVS has the advantage of not wearing out with repeated use while MOVs silently stop, um, MOVing.

Before MOVs became popular, they used to make some really big TVS devices.

I would not put a MOV in parallel but I might put a GDT in parallel.
 

Offline MarkF

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Re: TVS Diode for Surge Protector
« Reply #2 on: August 31, 2019, 12:27:22 am »
The Bourns Hybrid GMOV Components also look promising.
 

Offline Wookie555

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Re: TVS Diode for Surge Protector
« Reply #3 on: August 31, 2019, 08:13:15 am »
Quote
TVS is more expensive than a MOV...
this explains the difference in popularity

This makes sense for residential installations, but there are plenty of corporate customers willing to pay more for extra reliability.
It's strange that I can't find *any* DIN modules using TVS diodes even when the parts are commercially available.
 

Offline Wookie555

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Re: TVS Diode for Surge Protector
« Reply #4 on: August 31, 2019, 08:15:25 am »
Quote
The Bourns Hybrid GMOV Components also look promising.

Would I get the same result if I put a GDT in series with an existing MOV based unit?
 


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