Where can I find replacement capacitors like these? - Page 1
Forum section: electronics / beginners

author: Kilobytez95
author_rank: Newbie
timestamp: August 14, 2015, 06:12:56 pm
content: I'm pretty new to electronics repair and stuff like that so i don't really know where the best places to get things are. Basically I'm currently trying to repair an old stereo receiver that has a few problems that I believe are from failing parts. Right now I need 2 8000uf 66 volt caps but at this capacitance they seem to be hard to find. The best I could find was giant ones for ac units or something that clearly won't fit in my reciver.I would prefer a higher temperature rating since the amp IC they are next too gets really hot.I hope somebody can help me out here.EDIT: I was able to find these caps (http://www.digikey.ca/product-detail/en/ECO-S1JA822EA/P7491-ND/411749) they seem like a pretty clsoe replacment but I'm not 100% sure yet.

author: retiredcaps
author_rank: Super Contributor
timestamp: August 14, 2015, 06:18:55 pm
content: Digikey shows a lot of selection if you use 10000uF and 63V. Some are 105C and you can see the dimensions listed as well on their website.

author: Kilobytez95
author_rank: Newbie
timestamp: August 14, 2015, 06:21:53 pm
content: I was pretty sure you shouldn't change the capacitance value only the voltage and temperature can be changed. i guess in this case these are more than likely just filtering the input of the amplifier IC so a little extra wouldn't hurt anything.

author: retiredcaps
author_rank: Super Contributor
timestamp: August 14, 2015, 06:30:10 pm
content: After a bit more searching after my first post, Digikey has a good selection for 8200uF and 63V in a variety of brands, sizes, temperature, etc.

author: Kilobytez95
author_rank: Newbie
timestamp: August 14, 2015, 06:30:48 pm
content: I had a look but nearly all of them seem way to big.

author: CatalinaWOW
author_rank: Super Contributor
timestamp: August 14, 2015, 06:34:40 pm
content: Large electrolytic capacitors like these are virtually always used in situations where the value is not terribly critical, so going up by 50% or more in capacitance won't be a problem.I have found that I can rarely find an exact substitute, but fortunately as technology has improved sizes have gone down so fit is usually possible, with two caveats.1. Lead spacing is rarely the same. For wire leads this isn't too bad a problem, but tab leads are a bigger problem. You can substitute a wire lead part, or add wires to the tabs on the new part. Be sure to use large enough wire for the currents involved (use trace size as a guide if you don't know) and be sure to add mechanical support since the cap is no longer sitting on it's base.2. Volumes have decreased but form factors change. The newer caps are often shorter and fatter than the one you are replacing. Be sure to check both dimensions for compatibility with the space you have to put them in.Don't quit looking with the first choice you find that works. I have found 10:1 price differences for similar capacitors. Sometimes the price difference is due to a real quality difference, but often it is due to differences such as overstock, or a standard value which is produced in high volume or other difference which doesn't affect anything except your pocketbook.

author: Kilobytez95
author_rank: Newbie
timestamp: August 14, 2015, 06:41:59 pm
content: I was able to find this (http://www.digikey.ca/product-detail/en/ECO-S1JA822EA/P7491-ND/411749) it seems like a pretty good match and I think it's a bit smaller than what I need space wise but I'm sure i can make it fit.