I have to replace a bunch of capacitors on the acquisition block of a portable digital oscilloscope and one of the requirements is that the capacitors have beto be small.

I am trying to decide between Panasonic KS/KA series and Nichicon UMW.

Can anyone advise which one suits better my application?

Panasonic KS/KA is a standard series. Nichicon UMW is an audio series.

I have a preference for Panasonic as I can buy locally. But not sure Audio would be of any benefit here.

Panasonic https://docs-apac.rs-online.com/webdocs/0027/0900766b800274c4.pdf

Nichicon http://nichicon-us.com/english/products/pdfs/e-umw.pdf

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    \$\begingroup\$ What do the capacitors do in your circuit? Decoupling? AC coupling? What frequencies do they have to handle? \$\endgroup\$ – JRE May 1 at 22:06
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    \$\begingroup\$ I prefer capacitors with bamboo fiber dielectric. If you use anything else in your scope, the signal will become muddy and indistinct, and it will lose its warmth. \$\endgroup\$ – pipe May 1 at 22:14
  • \$\begingroup\$ Nope, I am not asking about mechanical space. I am asking between two series of capacitors characteristics. One is standard and one is audio rated. How those will perform on an oscilloscope acquisition system that has to deal with signals up to 20MHz. \$\endgroup\$ – GuiSoySauce May 1 at 22:15
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    \$\begingroup\$ Specifications of importance: Capacitance, voltage rating, temperature, ESR. Compare specifications to the OEM capacitors. \$\endgroup\$ – Spehro Pefhany May 1 at 23:29
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    \$\begingroup\$ If you want peace of mind consider using Aluminum Polymer Electrolytics instead. In general their specs are much better, they are much more reliable and are supposed to last much longer. \$\endgroup\$ – joribama May 2 at 1:57

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