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Tantalum cap identificaton. Please help.
Tantalum cap identificaton. Please help.
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Old 31st March 2004, 08:15 AM   #1
sv is offline sv  Russian Federation
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Join Date: Mar 2004
Location: Novosibirsk
Default Tantalum cap identificaton. Please help.

I have on board tantalum SMD capacitors.
No marks. Orange. A stub on one side.
Folk say this is "unmolded" capacitor.
I failed to find on the internet any such a capacitors.
Please tell me any correct name for such a part, or a
producer's name.
TIA
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Old 1st April 2004, 01:31 AM   #2
beerguy0 is offline beerguy0  United States
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Join Date: Feb 2004
Location: Upstate NY
Default Re: Tantalum cap identificaton. Please help.

Quote:
Originally posted by sv
I have on board tantalum SMD capacitors.
No marks. Orange. A stub on one side.
Folk say this is "unmolded" capacitor.
I failed to find on the internet any such a capacitors.
Please tell me any correct name for such a part, or a
producer's name.
TIA
From your description, it sounds like a Sprague (now Vishay-Sprague) 5xxD series. These are solid tantalum capacitors having a high capacitance in a given package size/voltage rating, and a low ESR. Check out http://www.vishay.com/capacitors/tantalum/ for details.

I've used these in projects, and they work quite well. However, they can be prone to spectacular failures if pushed too hard. We use them quite a bit in switching power supplies,especially where space is an issue, but it pays to de-rate them heavily. BTW, the stub is the + side.

Cheers,

bg
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