Michael:

I worked at General Semiconductor for about 25 years.  I do not know of any
specific component safety standard for TVS diode components.  The one that
we, when at General Semiconductor, had to meet was the UL 497B for
telecommunications.  Generally, there is no safety standard for individual
components.  It depends on how they are connected in the circuit and their
location, that is for creepage and clearance distances.  These components
are used on AC power, DC power and data lines.  Their selection depends upon
specific applications and the peak pulse current and waveform.  These two
conditions are the only threat conditions that are important.  But it is
location of the device in the circuit or system that might cause of concern
for safety.
Dave

-----Original Message-----
From: owner-emc-p...@majordomo.ieee.org
[mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of Peters, Michael
Sent: Wednesday, June 19, 2002 6:33 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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