12 Nov
2011
12 Nov
'11
9:51 a.m.
I wrote:
10KV of galvanic isolation won't necessarily help
you much keeping
120VAC or 240VAC across an Ethernet transformer from resulting in
damage to the circuitry on the other side of the transformer.
Mouse wrote:
No...but the transformer is not going to pass very
much power at mains
frequency; it's designed for much higher frequencies.
It doesn't take any power to speak of to destroy MOS chips. It only
takes a voltage a little above the abs max Vdd rating, at a few mA.
If you put mains across the Ethernet transformer, it will destroy the
transformer quickly, but not nearly quickly enough to prevent damage to
the stuff on the other side.