questions about capacitors

[Demon-Xanth]

The last number is most likely a date code for lot tracking.

 

[sharkeeper]

Tantulums are nice flamers when they go. Smell up the place very bad too!

Nothing like the reverse pop of death of electrolytics! At least they give off a smell that's tolerable (honey roasted cheerios).

 

[cain]

so any idea where i can get one of those? would this work? There is a 470uF 10V one on this page, but not sure if it would be a good replacement

 

[Demon-Xanth]

What size is your current cap physically? Digikey or Mouser probably has them in stock (just add .com to thier names to get the webpage)

Also, the "K" is the brand mark for "Kemet".

 

[cain]

its tiny, lik3 5mmx5mmx10mm, think i will go to radio shack

 

[Demon-Xanth]

Oh, btw. Electrolytics mark the negative, tantalums mark the positive. This is good information to know.
http://www.digikey.com/scripts/DkSearch...ll?Detail?Ref=55403&Row=145374&Site=US

 

[cain]

Originally posted by: Demon-Xanth
Oh, btw. Electrolytics mark the negative, tantalums mark the positive. This is good information to know.
http://www.digikey.com/scripts/DkSearch...ll?Detail?Ref=55403&Row=145374&Site=US

would this one fit?? i think i will look in the school ECE lab to see if they have one or something...

PS: nevermind, it fits, i am an idiot

 

[Analog]

470uF Tantalum Surface Mount
10V, polarized

Produced in the 34th week of 2000.
http://rocky.digikey.com/WebLib/Kemet%2...talum%20Surface%20Mount%20-%20T491.pdf
Digikey: 399-3095-1-ND
Manufacturer Part Number T491E477M010AS
Description CAPACITOR TANT 470UF 10V 20% SMD

 

[cain]

Originally posted by: yellowfiero
470uF Tantalum Surface Mount
10V, polarized

Produced in the 34th week of 2000.
http://rocky.digikey.com/WebLib/Kemet%2...talum%20Surface%20Mount%20-%20T491.pdf
Digikey: 399-3095-1-ND
Manufacturer Part Number T491E477M010AS
Description CAPACITOR TANT 470UF 10V 20% SMD

i can't believe you found the exact one. in any case, it's poorly designed because of the fragile metal connetor pieces. i couldn't solder it back on because those connectors simply fell off

which brings me to my next question, what does a capacitor do in a cellphone? i have been told that it clears up the statics in the transmission. this would explain why my phone is still functioning without it though. anyone has any ideas?

 

[Demon-Xanth]

I've never had a problem with tantalum end caps coming off. They've held up under much more abuse than I've felt like they needed to. I chose the cap that I did because it was cheaper in low quantities

The capacitor is probably used in the power supply section.

 

[cain]

ok, cool. guess i will just order a few online then.

 

[Eli]

Originally posted by: cain
yeah i won't be soldering it back on, just gonna find another one and put it on. so it's possible to find another capacitor that is 470 uF, regardless of shape, and solder that one on?

Umm.. lol

So you're not going to solder it on......

How are you going to attach it? Tape?

There shouldn't be any problem with using a 470uF cap of any size, I wouldn't think... but obviously too big, and you won't get the phone back together.

 

[cain]

ordered 3 at like 2 dollars each, kind of pricey

 

[Eli]

Originally posted by: Eli

Originally posted by: cain
yeah i won't be soldering it back on, just gonna find another one and put it on. so it's possible to find another capacitor that is 470 uF, regardless of shape, and solder that one on?

Umm.. lol

So you're not going to solder it on......

How are you going to attach it? Tape?

There shouldn't be any problem with using a 470uF cap of any size, I wouldn't think... but obviously too big, and you won't get the phone back together.

 

[Demon-Xanth]

Eli: he won't be soldering the ORIGINAL cap's end back on.

 

[xirtam]

Originally posted by: Demon-Xanth
Eli: he won't be soldering the ORIGINAL cap's end back on.

Have you opened up a cell phone recently? I wouldn't want to try it... at least, not on a working phone. If it was one of those deals where if I messed up the solder job it was no big deal, sure, I'd give it a try.

 

[Demon-Xanth]

Eli/xirtam:

Originally posted by: cain
its tiny, it says 10k, but the k has a bar on top of it. it's absolyutely inmportant for me to replace it, need to solder it back onto my phone. but the metal connectors on the capacitor is broken

The part itself is broken. The phone is already apart. The phone does not work.

 

[cain]

ok got the capacitors today, unfortunately the contact points are very fragile tne the first two failed. managed to put the third one in without incidence. not sure if the capacitor is still in contact with the board since i had to jam it back in. oh well, praying for the best