I want to thank all those who replied for their responses.  We have a lot to
think over.

To answer questions posed: 
The concept is to find an alternative to MOVs for surge protection.
The attraction to the Transient Voltage Suppressors is their reliability and
current clamping characteristics.

General Semiconductor (now Vishay) does have a few "mains" rated, UL
approved TVSs.  They are rated to 120 VAC which doesn't make them useful for
European voltages.  The engineer I spoke with for Vishay informed me that
they are contemplating UL approvals for their 400 and 440 TVSs up to those
voltages.

Based on the response, TVSs do not appear to be a popular method of
transient protection on the power line.

Thanks again,

Michael Peters

-----Original Message-----
From: Peters, Michael 
Sent: Wednesday, June 19, 2002 9:33 AM
To: 'emc-p...@majordomo.ieee.org'
Subject: Transient Voltage Suppressor - Europe approvals?



Greetings,

Is anyone aware of Transient Voltage Suppressors (General Semiconductor
calls them TransZorbs) with any European safety approvals (Semko, Demko,
VDE, etc.,)?  They would need to be rated for mains voltage.

Thanks,

Michael Peters

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