Re: Samwha UT 450v 4.7uF 125ma@120Hz replacement

Thank you for the information budm. I guess I'll just order the highest rated ripple in stock just in case and not replace that cap unless it starts bulging or I buy and test it with an ESR meter.

[url]https://www.digikey.com/product-detail/en/panasonic-electronic-components/ECA-2WM4R7/P5343-ND/245097[/url]

Also just to confirm, am I correct in assuming that when converting ripple you just multiply the rating in the chart by the number under the hz rating on the other chart?

Example of how...

Re: Samwha UT 450v 4.7uF 125ma@120Hz replacement

From BXC sheet
[CODE]◆MULTIPLIER FOR RIPPLE CURRENT
Frequency（Hz） 120 1k 10k 100k≦
Coefficient 1～5.6μF 0.20 0.40 0.80 1.00[/CODE]

From SamWha sheet
[CODE] FREQUENCY COEFFICIENT OF PERMISSIBLE RIPPLE CURRENT
Frequency 50Hz 120Hz 1kHz 50kHz 100kHz≦
Coefficient 0.80 1.00 1.10 1.30 1.40[/CODE]


I don't think its a 20hz difference unless I'm completely misunderstanding these charts....

Re: Samwha UT 450v 4.7uF 125ma@120Hz replacement

That's at 100khz not 120hz so unless I misunderstood the box that states "MULTIPLIER FOR RIPPLE CURRENT" on page one of the spec sheet you multiply 220 x 0.2 to get 44ma@120hz. Digi-key even lists it as 44ma ripple but doesn't state what frequency.

[url]https://www.digikey.com/product-detail/en/rubycon/450BXC4.7MEFCT810X20/450BXC4.7MEFCT810X20-ND/3566098[/url]Re: Samwha UT 450v 4.7uF 125ma@120Hz...es "MULTIPLIER

Re: Samwha UT 450v 4.7uF 125ma@120Hz replacement

Unless I misunderstood what I read on these forums in several threads about the ripple needing to be equal or greater than the original on these TV power boards, how is the BXC's 44ma@120hz equal to or greater than 125ma@120hz of the original generic cap? If greater ripple means a lower ma then I'm going to have to repic my entire order again.

I'm ordering parts for my old 42in Phillips so I can give it to granny but I can't find anything with specs that match or surpass the one SamWha UT 450v 4.7uF 125ma@120Hz ripple. It looks like it might be a little bloated and since I don't have an ESR meter to test it I want to buy replacements for all caps on the board. I plan to place my order tonight or in the mourning whether I find and alternative to this cap or not. So far I have found everything else on Digi-Key.

Super simple version.
Need to find alternative to Samwha UT Series 450v 4.7uF with ripple rating of 125ma@120Hz...

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