Why using capacitor in transformer less ac to dc converter

Question

I saw many transformer-less power supplies using capacitive resistance of a capacitor.

But I don't know exactly what the reasons are for using capacitors instead of normal resistors .

I guess two reasons:

Capacitors are more isolated than resistors.
Capacitive resistance waste less power (is it right ?)

both are right, but it depends on the load. have you looked into how they work? — Marcus Müller, Jun 06 '20 at 19:32
capacitors don't turn 100% of excess power into heat like resistors do. — dandavis, Jun 06 '20 at 22:07

score 0 · Accepted Answer · answered Jun 07 '20 at 00:28

0

Resisters waste lots of power .Capacitors and inducters waste much less power .At 50Hz the inducter would be expensive,Bulky and heavy .Hence the capacitor .

answered Jun 07 '20 at 00:28

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Why using capacitor in transformer less ac to dc converter

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