Hello,
I need a >=3D400V >=3D4.7uF pulse capacitor with a dV/dt rating >=3D20V/us.

I can find them on Mouser, Digikey, etc.. e.g.:
http://www.kemet.com/kemet/web/homepage/kechome.nsf/vapubfiles/F3294_PHE426=
..pdf/$file/F3294_PHE426.pdf

But they are all too big/bulky!!

What should I look for? Is there a different technology than polypropylene,=
 still suitable for >=3D20V/us pulse applications, and is not as bulky as t=
hose caps?

Even half the size would already be a big win for me.

Thanks for any hints,
Mario

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