Author Topic: Blown cap value  (Read 691 times)

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Offline R-1125FTopic starter

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Blown cap value
« on: June 26, 2025, 08:29:04 pm »
I need to replace a capacitor like the one in the photo.   I don't know how to read the code on it.  It is a 3528 size tantalum capacitor marked with a capital E and another character that I don’t recognize.  I am guessing that it is a 15 micro Farad 25V.   Could someone tell me the value of this cap and how to read the code in case I run into another one?

 

Offline indeterminate

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Re: Blown cap value
« Reply #1 on: June 27, 2025, 08:49:21 am »
Without knowing the manufacturer it could mean anything.
even knowing who made it it could just be a batch number.

Find another of  the same component on the board and remove / measure it is the only way.
chances are that its just a filter cap on a power rail so as long as the voltage rating is high enough for the rail then sumthing around the same size should be fine.
 

Online coromonadalix

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Re: Blown cap value
« Reply #2 on: June 27, 2025, 11:20:51 am »
mmm    the pc17  marking  does not generally fit a capacitor placement ?
 

Offline wraper

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Re: Blown cap value
« Reply #3 on: June 27, 2025, 11:31:19 am »
What kind of device is it, on what power rail it sits?
 

Offline R-1125FTopic starter

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Re: Blown cap value
« Reply #4 on: June 27, 2025, 01:21:21 pm »
This in an MSI laptop.  I think the "P" designates that the cap is on a power rail.  I beleive this is on the 20V power circuit in the GPU area.  There is no schematic available for this model, but I compared it to another similar model and it uses 15 microfarad at 25V.   I resisted pulling a good one out, but I may have to do that to be sure.
 

Offline wraper

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Re: Blown cap value
« Reply #5 on: June 27, 2025, 01:47:13 pm »
Very unlikely that it's a regular tantalum capacitor. Most likely it's either LOW ESR polymer tantalum or polymer aluminum. Anyway, putting 25V regular tantalum capacitor on a 20V rail is a no go. They need at least 30% voltage derating and 60% for actually good reliability. On other hand polymer tantalum and polymer aluminum do not require huge derating.
 
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Offline R-1125FTopic starter

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Re: Blown cap value
« Reply #6 on: June 28, 2025, 02:35:54 am »
I think I figured out what it is.  It was made by KYOCERA AVX, part number TCOB1E156M8R.  According to the datasheet, the code for a 25V 15 microfarad conductive polymer tantalum cap is Ee.  The datasheet did not make this easy to find. 


 
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