Proving to be difficult for me :/

[RussianDood]

Well We have a computer in our shop with bad bulging capacitors, This inst my first cap replacement job, but unlike the others, I cannot, for the life of me find a replacement anywhere :/

If anyone has an idea where to find it, or find one that will work.

By the way they are 8x25mm 6.3v 820uF 105 C and I need 6 of them. If it helps I can take a picture and post. Also the 8mm diameter will need to be the same because of room.

[selldoor]

Re: Proving to be difficult for me :/

What would help is if you updated your profile with country and mains voltage.

Suggesting where to get something is pretty difficult without knowing where you are.

If we assume electrolytic capacitors the following might do

http://www.digikey.com/product-detai...0198-ND/266208

[retiredcaps]

Re: Proving to be difficult for me :/

By the way they are 8x25mm 6.3v 820uF 105 C and I need 6 of them. If it helps I can take a picture and post. Also the 8mm diameter will need to be the same because of room.

You can support this forum by purchasing them here

https://www.badcaps.net/store/produc...roducts_id=163

The above are 8mm diameter and low ESR caps.

[RussianDood]

Re: Proving to be difficult for me :/

Sorry about that, There i updated that.

You can support this forum by purchasing them here

https://www.badcaps.net/store/produc...roducts_id=163

The above are 8mm diameter and low ESR caps.

And those would work but one problem is that they are only 12mm, which is a huge difference to 25mm. And I also heard that the cap physical size either has to be the same or bigger.

[retiredcaps]

Re: Proving to be difficult for me :/

And those would work but one problem is that they are only 12mm, which is a huge difference to 25mm. And I also heard that the cap physical size either has to be the same or bigger.

Cap size does NOT have to be the same or bigger. You can go up in voltage which usually means the cap is bigger, but there is no need. Stay with the same capacitance. You want to match ESR and ripple.

PCBONEZ explains it here

https://www.badcaps.net/forum/showpo...30&postcount=7

[RussianDood]

Re: Proving to be difficult for me :/

Cap size does NOT have to be the same or bigger. You can go up in voltage which usually means the cap is bigger, but there is no need. Stay with the same capacitance. You want to match ESR and ripple.

PCBONEZ explains it here

https://www.badcaps.net/forum/showpo...30&postcount=7

Thank you so much for clearing that up, You were A HUGE help

[RussianDood]

Re: Proving to be difficult for me :/

So the forum page states the Ripple and ESR are only affected by can size, If can size is bigger then it has low ESR and High Ripple. So to find a capacitor that will work on my system board I have to find a Cap that is the same or bigger?

[retiredcaps]

Re: Proving to be difficult for me :/

Caps have advanced in the last few years. You can make a smaller physical size cap and still match the same ripple and ESR as the originals.

Here is an example between Panasonic FR and FC series.

Panasonic FR 820uF 6.3V, 8x11.5 mm, 56 mOhm, 950ma ripple

http://www.digikey.com/product-detai...360-ND/2433494

Panasonic FC 820uF 6.3V, 8x15 mm, 85 mOhm, 730ma

http://www.digikey.com/product-detai...0198-ND/266208

So as you can see FR has less ESR and more ripple even though it is 3.5mm shorter than FC.

So find out the original specifications for your existing caps and compare them to the replacements.

[RussianDood]

Re: Proving to be difficult for me :/

OHH alright, thank you for your help. I will get right on that. I will post up with results.

[RussianDood]

Re: Proving to be difficult for me :/

So the Caps Arrived, Thank you Badcaps
After replaced them I haven't run in to any problems So it looks to have worked perfectly fine. BTW I used the https://www.badcaps.net/store/produc...roducts_id=163 Caps. Thank you sooo much retiredcaps.