Rubycon PMLCAP

[Terry Demol]

Hi Folks,

Has anyone tried the new Rubycon Polymer Multi layer caps yet for
dig bypass applications etc?

They look to be an improvement on ceramics in a few areas.

http://www.rubycon.co.jp/en/catalog/pmlcap_e.pdf

http://www.rubycon.co.jp/en/catalog/e_pdfs/pmlcap/e_ST.pdf

cheers

Terry

 

[Malefoda]

Product Information: Features and applications of polymer thin film multi-layer capacitor "PMLCAP"/Capacitor, Power Supply Units RUBYCON CORPORATION
They do look good at audio coupling, are they?
Anyone used them?

 

[Monte McGuire]

They are interesting caps for large values, especially if the part must be reflow soldered and must be small and thin. The drawbacks as I see them are their very high cost and their low rated voltage. They also have very high dissipation factor (1-2%), but given their small size and high K, this is not surprising.

At this point, if you can tolerate the large size of an Al electrolytic, they will work a lot better and cost 10-50x less. However, they will have a finite life, whereas Acrylic film caps will not wear out. I was looking for a small cap around 10µF to use with an RMS detector, and I decided to use a conventional Al electrolytic instead of these caps, mostly because of their cost. YMMV.

 

[Malefoda]

Thanks!
Seems beside small size and life expectancy the best sound quality goes to classis SMD cap. Dissipation factor causes distortion right? They may be very good tiny decoupling caps then, not that great for coupling.

 

[WWWWW11]

Product Information: Features and applications of polymer thin film multi-layer capacitor "PMLCAP"/Capacitor, Power Supply Units RUBYCON CORPORATION
They do look good at audio coupling, are they?
Anyone used them?

PMLCAP is supreme for audio.
It has high resolution and wide depth of space.
My favorite.

Capacitor kit is reasonable price.
https://www.digikey.com/products/en?keywords=1189-4323-KIT-ND