I need new Capacitors, What is Ripple Current? Is it Important?

ESK8 Electronics
1

I have been rocking an Ollin VESC 4.12 for almost 2 years now and I think I need to replace the capacitors, Could somebody help explain ripple Current?

And If these new Caps I found on Mouser will work as replacements? https://www.mouser.com/ProductDetail/Nichicon/UHE1J681MHD?qs=sGAEpiMZZMtZ1n0r9vR22VnKtxyD4xsRcZer8mYjQVo%3D

Thank You

IMG_0573 IMG_0576 IMG_0575 IMG_0571

2

I did a bulk cap research few days ago. In a nutshell there are 3-4 important features you want to look for: Impedance (ohms) is an indication of the obstacles to the flow of current to/from the cap; so the lower, the better.

Life time (hours): this one is obvious

“Ripple current” which should be called “resistance to ripple current” to avoid misundersanding: this tells you how well the non ideal capacitor handles the ripple current which is a bad thing; the higher the ripple current resistance, the better.

Considering these factors, EEUFR1J681L seems to be the best caps out there.

4 Likes
3

Thanks a bunch Bro! I will look into it, and hopefully this thread can help others in the future as well.

4

http://www.rs-online.com/ these guys have stock in most countries around the world.