Author Topic: Metallized Polyester Film Capacitors  (Read 2092 times)

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Offline SG-1

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Metallized Polyester Film Capacitors
« on: February 19, 2011, 12:07:27 am »
The capacitor has a DC rating, but neither end is marked +/-   ???

http://www.vishay.com/docs/42091/v430p.pdf

Works either way ??   :-\

A .47micro-F is being used in parallel with a 400V 40A diode in a 125VDC circuit.
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Online mikeselectricstuff

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Re: Metallized Polyester Film Capacitors
« Reply #1 on: February 19, 2011, 12:44:08 am »
These caps are non-polarised, so can be used any way round.
Only caps that use 'special' dielectrics to achieve high capacitances are polarity sensitive - e.g. electrolytic, tantalum, aluminium polymer.
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Offline SG-1

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Re: Metallized Polyester Film Capacitors
« Reply #2 on: February 19, 2011, 01:55:29 am »
Well now, that just takes all the potential for excitement out of this circuit !  ;D

Thank you very much.
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Offline Zero999

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Re: Metallized Polyester Film Capacitors
« Reply #3 on: February 19, 2011, 09:50:38 am »
Yes they're non-polarised and note how much larger they are than electrolytics of the same value and voltage rating.
 


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