Just to check with you guys, what capacitor is this?

[SmallWalrus]

Sorry for the newbie question, I figured that I probably am wrong, so I thought to post a picture of it



This is a 22pF capacitor right? However what does the g81 underneath it mean? And how do I find out the voltage for it?

[metalphreak]

That looks like a tantalum capacitor (since it has a polarity marking) and is most likely 22uF. Could also be one of those fancy SMD package electrolytic ones?

g81 will be some kind of manufacturer code. Could be anything from a date/week code to tolerance specs to a batch number. Hard to tell without knowing which brand/model it is to look at the datasheet.

22picofarads would normally be much smaller, like the size of those tiny brown/beige ceramic caps.

[SmallWalrus]

Thanks for your reply

How do I find out what voltage it is though?

[SmallWalrus]

Is there some guide on how to read these codes too? I've found 2 on Google and from what they said, it does seem like "220" is a 22pF value (as much as it might not make sense).

[mariush]

220 simply means  22 x 10⁰   = 22 ... uF , pF ... up to the size of the capacitor... at that size it's more likely to be 22uF, it's too large to be pF.

821 would mean  82 x 10¹ = 820uF etc etc

as for the voltage... since they're near a chipset or some chip/controller etc... the voltages are probably around 0.8-1.8v so they're probably rated for 2-2.5v ... can't be sure without actually probing or without checking chips around the area (see maybe there's a switching voltage regulator and maybe you can determine the voltage based on its datasheet and surrounding parts)

[Martin_bg1]

It is not possible to be pF cause it has polarity.
About the voltage, if its possible turn it on and measure it .