Do these replacement capacitor specs match old component?

Discussion in 'Electronics & Electrics' started by juppy, Nov 7, 2018.

  1. juppy

    juppy Member

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    Repairing a power supply in my Panasonic plasma and looking for some advice on whether or not this Rubycon capacitor below will be a good match for the failing ones Im replacing.

    It's a match for the physical size, uF, voltage and temperature rating. However I'm not 100% sure about the high ripple current and ESR (I'm unsure what those last two specifications even mean to be honest).

    The old caps are Nichicon PT(M) series 330uF 250v 105c radial Electrolytic. They are also marked C1153. Apparently they are classed as High Ripple Current.

    The replacement caps I'm looking at are the following Rubycon:
    https://au.element14.com/rubycon/250bxw330mefr18x40/cap-330-f-250v-20/dp/2480276


    Could someone much smarter than me please compare the spec sheets of these two caps and let me know if I'm barking up the wrong tree?

    Or alternatively, if someone knows what the updated Nichicon series would be to replace the PT(M) series that may also be helpful. I assume the PT has been discontinued as I cant seem to find any, at least not in Australia.

    I did enquire with element14 but they were unable to supply a solid answer on the ripple current and ESR.

    Thankya.
     
  2. @rt

    @rt Member

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    Ripple current is easy. The Rubycon you’re looking at are always better for the same voltage/value/frequency.
    I don’t see mention of ESR, but that’s characteristic of high ripple current (a low ESR cap will warm up, and tolerate less ripple current).
     
  3. desertstalker

    desertstalker Member

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    Isn't this backwards? AFAIK for higher ripple you want lower ESR.
     
  4. OP
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    juppy

    juppy Member

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    Thanks guys for the feedback, have ordered a bunch of caps to basically recap the entire board. I think I've narrowed it down to a couple of the larger ones with a hairdryer test though.
     
  5. Matthew kane

    Matthew kane Member

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    For power supplies the Panasonic FC, FM's are excellent for the job with low ESR and high ripple. E14 have them as well. The Nichicon in the link is a bog standard slim cylinder type for tight areas compared to the usual 30x25/30mm snap in types.
     
  6. OP
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    juppy

    juppy Member

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    Yeah its odd how my 2012 Panasonic plasma doesn't actually use any Panasonic caps, it's mostly all Nichicon on the power board (which looks a bit cheapo Chinese) and Rubycon on the other boards. The link in my opening post is actually for Rubycon (not Nichicon).
     
    Last edited: Nov 15, 2018
  7. Matthew kane

    Matthew kane Member

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    Because the Panasonics cost a bit more. Those type of Rubycon and Nichicon's are very standard capacitors.
     
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    juppy

    juppy Member

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    Yeah but what does it say when a manufacturer uses another company's components when they themselves make an equivalent or better component. Comes down to build price though I guess. Not that most endusers will ever know the difference.
     

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