smd capacitor markings

[blutch]

hello, I'm trying to read the values of this solid smd capacitor that came from a MSI 8600 gt video card. the values printed on it are as follows..

7Z
100
EZA

any help would be appreciated.

thanks

[mariushm]

Re: smd capacitor markings

It's definitely 100uF.

The voltage, I don't know. However, the maximum voltage on a video card is 12v, so at most you'll need a capacitor rated for 16v, that will work for sure.

If the capacitor is after the voltage converter on the video card, the voltages can be as low as 1.8-2v, so this one may be rated as low as 4-6.3v.

Polymers rated for 16v may be too large for you but I can't tell the dimensions from the picture - there's no reference (coin or a ruler). I'd recommend posting an image of the whole video card, from where you removed the capacitor.

It's not smd btw ....or doesn't look like one... the regular smd capacitors have the terminals on the side on a square base.

[blutch]

Re: smd capacitor markings

it does have a base, my son knocked it off installing the vid card. i hope this pic helps some. the card has surface or thru hole mounting for that cap.

thanks for the help...

it does come up as 94 on my capacitor meter

[mariushm]

Re: smd capacitor markings

That rectangular chip above the location of the capacitor takes the 12v from the computer and generates a lower voltage for the video card's use.

The picture is out of focus so please write down what it says on that chip - with that information, we may find the datasheet and determine what voltage it generates.
For example, if that chip generates 1.8v, then a capacitor rated for maximum 2.4v would be ok. If it's for 3.3v, then a 4v may be suitable and so on.

But as you can see below, for that diameter, the lowest voltage rating is 4v so probably all the recommendations below will be good for you. Doesn't hurt to double check though.

In the meantime, use the ruler to determine the diameter and height - height is less important as it looks like there's no heatsink or any other things above it that would be affected if you choose a taller capacitor.

It looks like that's a 6.3 mm (diameter) one, so these would probably do just fine:

100uF 16v 6.3mm (min 5 to order) : http://search.digikey.com/us/en/prod...0-1-ND/1826750

100uF 6.3v 6.3mm (min 5 to order) : http://search.digikey.com/us/en/prod...10-1-ND/758634

100uF 6.3v 6.3mm : http://search.digikey.com/us/en/prod...8-1-ND/2327064

100uF 4v 6.3mm : http://search.digikey.com/us/en/prod...9-1-ND/1136114


Double check the diameter, it could be only 5mm in which case these will do:

100uF 6.3v (min 5) : http://search.digikey.com/us/en/prod...7-1-ND/1826727
100uF 6.3v : http://search.digikey.com/us/en/prod...0-1-ND/2202802
100uF 4v : http://search.digikey.com/us/en/prod...7-1-ND/2202799

Digikey is great if you're in US. If you're not, try uk.farnell.com , mouser.com ...

[blutch]

Re: smd capacitor markings

sorry about the pic quality. to get it that good i had to shoot it through a magnifying glass.
the diameter is 6.3mm, and height w/base is 8mm.
the black chip next to it is as follows.
NIKOS
P1703BDG
VN14J3718

hope this helps, as my son would like his expensive vid card to work again.
the card is an MSI NX8600GTS pci video card.

[mariushm]

Re: smd capacitor markings

Ok, that helps but it's not actually a chip used to regulate power, it's just some sort of special transistor.

I'm fairly sure a 6.3v one will do but if you don't mind ordering the minimum quantity of 5, go for the 16v ones.

Or check other online stores, for example see if you can get one of these from farnell.com, should be just as good (ignore the pictures, they're generic for the series of capacitors, don't show the correct values):

http://uk.farnell.com/rubycon/16tzv1...16v/dp/1281861
http://uk.farnell.com/nichicon/uud1c...16v/dp/8823308

[blutch]

Re: smd capacitor markings

if mine has a height of 8mm w/base wouldn't it be best to match it for ripple, or is that not important in this caps area? Sorry I'm just a wanabe, do it yourself electronics nubee, trying to learn.

thanks for the help.....
also i order from digikey regularly.... my preffered place.

[mariushm]

Re: smd capacitor markings

I've already took care of that when I made the selection - the ones from digikey have the highest specs.
Anyway... the 16v nichicon ones are rated for 2700 mA ripple... that's quite a lot. In real world, I think there shouldn't even be 1000mA ripple on that area.

[blutch]

Re: smd capacitor markings

thank you very much. i'll order the 16v ones from digikey today. 'll let you know how it works...

thanks again