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automotive ignition condenser uf and voltage rating?

Anyone know an approximate rating for an ignition condenser like
voltage and uf? Can these things be used in HV electronics as a
regular capacitor?
 
T

Tim Williams

Jan 1, 1970
0
Anyone know an approximate rating for an ignition condenser like
voltage and uf? Can these things be used in HV electronics as a
regular capacitor?

0.33uF 200V? Ballpark.

Replace with a snubber rated film capacitor, encapsulated further if
necessary (considering most points caps are metal cased!).

If you're asking if you can use some in a different circuit, sure, but hell
I don't know why you'd be asking the value, it's usually stamped on the
things you know.

Tim
 
K

kell

Jan 1, 1970
0
Anyone know an approximate rating for an ignition condenser like
voltage and uf? Can these things be used in HV electronics as a
regular capacitor?

The "condenser" I tested read 0.2 uF.
As for voltage rating, I'd guess several hundred volts. Traditional
coils
from old style, dwell based inductive ignitions have a turns ratio of
about 100 to 1. If such a coil puts out about 20kV, that means the
condenser would have to withstand 200 volts, but of course it must have
a significant safety margin -- maybe a factor of two? And then there
is
"coil fault;" if a spark pug wire falls off and there is no place for
the coil's
energy to go, the flyback voltage is even greater. I would think a
condenser
would have a 400 volt rating, ballpark, but that is just semi-informed
speculation
on my part.
 
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