Panasonic ECWF(A) small size MKP - diyAudio
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Old 8th October 2013, 09:57 AM   #1
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Default Panasonic ECWF(A) small size MKP

Hi all

I found this type of cap on mouser,
Unfortunately datasheet gives almost no information about dissipation factor and loss.

Are they usable as DC blocking (series) Caps?
I'm asking because of the size ... it's really much less than all of other popular MKPs like PHE426 series, Epcos B3265.. or Wima MKP4 with comparable capacitance and voltage.

Will they still have similar good AC performance as known larger types? Or are they for power supply use, like DC Link types of other brands?

Any user experience as blocking caps?

Regards
dimashek
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Old 8th October 2013, 10:39 AM   #2
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Datasheet here --> http://industrial.panasonic.com/www-...BD0000CE47.pdf Looks ok to me.

even more info here --> ECWF(A) Series | Film Capacitors | Passive Components | Industrial Devices | Panasonic Global which is where I pulled that datasheet from...

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Old 8th October 2013, 11:00 AM   #3
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Thanks Tony.
this file found at your second link is good
http://industrial.panasonic.com/www-...D0000PE114.pdf

It looks like good PP film cap in very small package.
but how do they do that? I thought PP needs to be big

any real user experience with this caps will be helpful
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Old 8th October 2013, 11:13 AM   #4
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The performance of the 450V version seems to be worse than the 250V and 630V versions.
4A ripple @ 2kHz = very good
82V/us for step pulse is poor for plastic film. Very good approaches and even exceeds 1kV/us
Tan delta/dissipation of the 250V version is much better than both the higher voltage versions.
Surface temperature of the 250V version is very slightly better than the higher voltage.

For a 250V device it is about the right size/volume. Some space is saved by not having a plastic case.
There are smaller 50V or 63V in MKP

There is lots of info in the datasheet posted by Winter.
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Old 8th October 2013, 11:34 AM   #5
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Quote:
Tan delta/dissipation of the 250V version is much better than both the higher voltage versions.
thank you for the hint with delta of 250V version.
Cannot agree with right size/volume. Never saw 4.7uF 250V PolyProp with 22mm lead spacing and only 13.8mm width. They are all 27,5mm

Is step pulse performance relevant for small signal performance (like mic input phantome bocking caps)?
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Old 8th October 2013, 08:20 PM   #6
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Quote:
Originally Posted by dimashek View Post
Never saw 4.7uF 250V PolyProp with 22mm lead spacing and only 13.8mm width.
They are all 27,5mm.
True, this is indeed a proper capacitance/size relation.
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Old 9th October 2013, 03:26 PM   #7
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compare 1uF
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