Oscilloscope cap replacement - Panasonic vs Nichicon - Page 1
Forum section: electronics / repair

author: gkmaia
author_rank: Frequent Contributor
timestamp: April 30, 2019, 08:54:04 am
content: I got to replace a bunch of capacitors on the acquisition block of a portable digital oscilloscope and one of the requirements is to be small.I am 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.Panasonichttps://docs-apac.rs-online.com/webdocs/0027/0900766b800274c4.pdfNichiconhttp://nichicon-us.com/english/products/pdfs/e-umw.pdf

author: Zero999
author_rank: Super Contributor
timestamp: May 02, 2019, 07:45:57 am
content: It doesn't matter. Going by the data sheet. I'd go for the Panasonic, purely because it's a better data sheet.

author: TERRA Operative
author_rank: Super Contributor
timestamp: May 02, 2019, 08:16:55 am
content: No point paying any premium on 'Audio' rated caps.As long as the Panasonic ones are genuine, they are a top-tier manufacturer and will work fine as long as the ESR etc is ok.

author: gkmaia
author_rank: Frequent Contributor
timestamp: May 02, 2019, 09:07:51 am
content: Thanks guys! Just bought them.

author: Electro Detective
author_rank: Super Contributor
timestamp: May 02, 2019, 09:19:56 am
content: 'Audio' rated capswhat's next on the sales pitch BS... NASA rated 'mission critical' caps ?

author: LateLesley
author_rank: Frequent Contributor
timestamp: May 02, 2019, 09:31:48 am
content: @Electro Detective,If you can think about it, usually someone, somewhere, has already done it.https://www.electronicsweekly.com/news/products/passives-products/kemet-launches-mission-critical-capacitors-2015-08/https://www.globenewswire.com/news-release/2017/06/01/1005953/0/en/KEMET-Expands-its-Portfolio-with-New-Space-Grade-Polymer-Capacitors.html

author: Gyro
author_rank: Super Contributor
timestamp: May 02, 2019, 11:43:58 am
content: Quote from: Electro Detective on May 02, 2019, 09:19:56 amYou really don't care about the fidelity of the trace?.... Oh wait, it's Digital.

author: Electro Detective
author_rank: Super Contributor
timestamp: May 03, 2019, 10:10:29 am
content: Quote from: Electro Detective on May 02, 2019, 09:19:56 amQuote from: LateLesley on May 02, 2019, 09:31:48 amSpace Grade Polymer CapacitorsT583 series organic polymer devices address mission critical applicationsWe'll wait and see if these 'organic polymers' hold up better in space than the synthetics.So this is what Kermit has been up to, to pay off the mortgage on the swampland.--------------------------Quote from: Gyro on May 02, 2019, 11:43:58 amThe AD converters may benefit, to smooth out those jagged edgesand expose any dishonest alias lurking in the works ()------------------------------------ok, this is my final attempt at light hearted -LOL- here:Have they done 'Video rated' caps ?"..videophool capacitors that won't let you down when you need them most,during intense, full on action packed, knock down drag em out,pawnvideo playback"

author: exe
author_rank: Unknown
timestamp: May 03, 2019, 10:31:37 am
content: A few years ago a bought a bunch of different panasonic caps without even knowing that some of them were "audio grade". Guess what, they seems to have a bit lower impedance (but they also have lower capacitance in the same volume). After I clean up my lab I can try to measure the difference with AD2. Stay tuned