non polar/bipolar capacitors

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are non polar and bipolar capacitors interchangeable. are they effectively the
same creature or are there truly significant differences in their application?
rg
 
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in my question I meant is there any difference between bipolar electrolytic
and nonpolar electrolytic capacitors
rg
 
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On 22 Aug 2004 21:53:04 GMT, tubelover@aol.com (TUBELOVER) wrote:

>are non polar and bipolar capacitors interchangeable. are they effectively the
>same creature or are there truly significant differences in their application?

Bipolar caps are basically two polarized 'lytics coupled head to toes. They
show a hoigh ESR, significant dielectric abs - just as 'lytics do.

Non polarized caps are usually film based and show much better electrical
properties (albeit at a cost, money- as well as space-wise).
 
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In <20040822182614.12238.00004230@mb-m01.aol.com>, on 08/22/04
at 10:26 PM, tubelover@aol.com (TUBELOVER) said:

>in my question I meant is there any difference between bipolar
>electrolytic and nonpolar electrolytic capacitors
>rg

Electrolytics are smaller than the other types for a given value of
capacitance. This becomes significant for larger values typically used
in power supplies and loudspeakers.

Unfortunately, the chemical paste used in the electrolytic's insulator
is polarity sensitive and will break down if voltage is applied in the
wrong direction. This makes electrolytics a poor choice for the the AC
signals processed in speaker crossovers. Fortunately, connecting two
capacitors in series in the (++) or (--) configuration cures the
problem, but requires about twice the volume. There is no fundamental
reason why other types of capacitors can't be used in speaker
crossovers (many feel that speakers sound better when we do), but
electrolytics are smaller and cheaper.

In applications requiring extremely low leakage, excellent high
frequency characteristics, or close capacitance tolerances,
electrolytics are a poor choice. Over time (typically decades for
modern electrolytics) the chemical paste tends to dry out and the
capacitor will slowly decrease in value and fail.

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On 22 Aug 2004 22:26:14 GMT, tubelover@aol.com (TUBELOVER) wrote:

>I meant is there any difference between bipolar electrolytic
>and nonpolar electrolytic capacitors

AFAICT, none : they are the same caps.
 
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TUBELOVER wrote:
> are non polar and bipolar capacitors interchangeable. are they
> effectively the same creature or are there truly significant
> differences in their application? rg

Not so much interchangable s the same thing.

geoff
 

paulo wilson

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capacitor values to wharfadale w30 d speakers cap electrolitcs says dry electrolitcs mfd m.v. 50 non plo 85%c ..... voltage value ....? thanks very much any sugestion or help will be deply apreciated iam in usa . pwilson
 
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