18 Mar
2007
18 Mar
'07
10:35 p.m.
On 18 Mar 2007 at 19:11, Mr Ian Primus wrote:
So, I need to replace that varistor - it evidently
was
there for a reason, and it kept me from blowing up the
transistor (no idea where I'd find a replacement for
that...) Anyone know a replacement? The only varistors
I am familiar with are those flat disc types that are
used in power strips as "surge protection".
Take a look here:
http://www.littelfuse.com/data/en/Data_Sheets/MA.pdf
You can toast a varistor if you apply a voltage and current that's
nigher than its specified ratings. That 100A rating is only good for
something less than about 25 usec; if an overvoltage persists for
longer periods, you can take the MOV out with substantially less
current.
Cheers,
Chuck