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nonpolar capacitors
nonpolar capacitors
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Old 13th February 2009, 12:32 PM   #1
unsolved is offline unsolved  Sweden
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Default nonpolar capacitors

Hi everybody,

does anybody know where i can get non-polar capacitors in europe? i need 22, 47, 100 and 20 uF, 25-63 V, axial. I have found radial but no axial capacitors.

I need them for my old mci-console....
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Old 13th February 2009, 03:03 PM   #2
mjf is offline mjf  Austria
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have a look at speakershops and so.
nonpolar elcaps (in german: bipolar) are often used in crossovernetworks for loudspeakers,so most speakersellers sell them too,e.g. intertechnik , visaton (germany).................
electronic part dealers like conrad,rs-components,...........too.
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Old 13th February 2009, 03:14 PM   #3
unsolved is offline unsolved  Sweden
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Thanks for the answer.

Unfortanely there's mostly lower capacitances for speaker usage, or they are too big to fit on the board.... I have seen up to 100 uF, 63 V and they are too big.

Lower capacitances have i found radial capacitors, but no axial...
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Old 16th February 2009, 09:32 PM   #4
PeteMcK is offline PeteMcK
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make them yourself... two polarized caps twice the capacitance you want connected in series, + to + or - to - (doesn't matter)...
Impedance varies with frequency, use impedance plots of your drivers and make crossover calculations using the actual impedance of the driver at the crossover frequency
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Old 16th February 2009, 09:43 PM   #5
unsolved is offline unsolved  Sweden
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Has been thinking about that solution. Has anybody tested it, will there be any difference from using "standard" non polarized capacitors??
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Old 17th February 2009, 12:32 AM   #6
zoranaudio is offline zoranaudio  Macedonia
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I think Yes, that will be "safer for cap. life" but what about ESR and equal inductance?.
I am also looking, searching for "Elna Silmic" caps from 4,7 to 100 mfd and difficult to find
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Old 20th February 2009, 03:29 PM   #7
audio.dream is offline audio.dream  Japan
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In fact,the non-polar capacitors is the same as the traditional capacitor if the basic material is the same.
If you need a 10uF/50V non-polar capacitor,the 10uF/100V capacitor with polarity is the same.
Or you could use two 20uF/25V(22uF is the value in real world) in series.
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