Assistance needed identifying Panasonic Capacitor

Discussion in 'General Electronics Chat' started by LiquidDump, Sep 30, 2012.

  1. LiquidDump

    Thread Starter New Member

    Sep 30, 2012
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    Hello, I am LiquidDump, and I would greatly appreciate some help. I am attempting to identify http://i.imgur.com/HpYvj.jpg < this capacitor found on an Nvidia GTX 570. The exact markings on the chip read "330 ontpf e". What I do know about the cap is that it is by Panasonic. I've tried searching their site, and I cannot find a match, nor can I find a match through Google. Thank you in advance, you fine people!
     
  2. praondevou

    AAC Fanatic!

    Jul 9, 2011
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    Looks like 330uF.

    Why do you think it's broken?
    Why do want it to be replaced by exactly the same type?
    How do you know it's from Panasonic?

    Make sure you identify where + and gnd of the board is. Some of these caps (chip tantalums) have there polarity marking inverted.
     
  3. LiquidDump

    Thread Starter New Member

    Sep 30, 2012
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    Well, it fell off. I assume it happened in storage. I had it properly stored, but stuff happens. The reason I need a replacement is because I can't re-solder the old one back on; it's lines broke off in the solder on the board. Do you have any recommendations for replacements? I am certain I can solder a new one on, the pads are fine.
     
  4. MrChips

    Moderator

    Oct 2, 2009
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    The 330 marking is confusing.
    336 would be 33μF.
    337 would be 330μF.

    330 could be either 33μF or 330μF.

    There are similar caps with the same marking on the board. I would unsolder one of the caps and measure the capacitance. There are replacements available if you can figure out the voltage rating.
     
  5. LiquidDump

    Thread Starter New Member

    Sep 30, 2012
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    I do have that option, but I need to find a device to measure the cap. I only have my trusty multimeter at hand. Thanks for you help so far!
     
  6. bountyhunter

    Well-Known Member

    Sep 7, 2009
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    My educated guess would be it's a 330 uF surface mount Tantalum capacitor.

    I can't tell the voltage rating or ESR because it's not marked.

    It appears there are many more like it on the board. You could desolder one and measure it's capacitance and ESR.
     
  7. MrChips

    Moderator

    Oct 2, 2009
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    If all you have is a voltmeter then you will have to improvise.
    Do you have 33μF and 330μF caps handy?
    Do you have resistors or a 555 timer IC handy?

    You can either perform a simple RC discharge test with known capacitors or you can build a simple LED flasher with the 555 timer and known capacitors and compare the results with the unknown cap.
     
  8. LiquidDump

    Thread Starter New Member

    Sep 30, 2012
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    I will do that ASAP, I must obtain a capacitance meter.
     
  9. LiquidDump

    Thread Starter New Member

    Sep 30, 2012
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    I don't have anything handy atm, I will need to make a trip to radioshack. Thank you for your help!
     
  10. bountyhunter

    Well-Known Member

    Sep 7, 2009
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  11. LiquidDump

    Thread Starter New Member

    Sep 30, 2012
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  12. MrChips

    Moderator

    Oct 2, 2009
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    My low cost DMM includes a capacitance reading setting.
     
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