KZG - KZJ - Same Electrolyte

[mockingbird]

Re: KZG - KZJ - Same Electrolyte

I have no idea at all whatsoever what they put in the electrolyte, but let me hypothesize that they need to put some sort of chelated metal in it, and instead of using a more expensive alloy, they use iron

[PCBONEZ]

Re: KZG - KZJ - Same Electrolyte

No, it's just the particular electrolyte used in KZG and KZJ is crap.

[Rulycat]

Re: KZG - KZJ - Same Electrolyte

What's going on at UCC? Were they having manufacturing issues?

[enduser]

Re: KZG - KZJ - Same Electrolyte

Lower ESR and higher ripple current usually means more water in the aqueous electrolyte. It may fail even quicker than KZG under thermal stress. What's the rated endurance of KZJ? If it's 2000 hours or lower, I'd suggest giving them a pass and sticking with Rubycon MCZ or Panasonic FM, both proven workhorses. Maybe even Nichicon HE/HD/HM.

I just Goggled the KZG series and this post came up. Wow you are right on the money with your prediction. A little over two years from this post, both the KZG and KZJ failed on a Dell Mobo. What is interesting is that the Mobo only had one of each and they were the only ones that failed. No other caps are faulty. It looks like United Chemi-con has now discontinued both those series.

[yanz]

Re: KZG - KZJ - Same Electrolyte

if kzj is almost the same with kzg, then people should avoid using it..

[PCBONEZ]

Re: KZG - KZJ - Same Electrolyte

I know that. - It wasn't a question it was a warning.
Been seeing people look for KZJ lately.

MBZ, MBZ, KZG, KZJ all have the same 2000hr Endurance.
Also all have same -40C, which suggests about the same water content.

Whatever the difference is, those aren't it.

.

[linuxguru]

Re: KZG - KZJ - Same Electrolyte

Lower ESR and higher ripple current usually means more water in the aqueous electrolyte. It may fail even quicker than KZG under thermal stress. What's the rated endurance of KZJ? If it's 2000 hours or lower, I'd suggest giving them a pass and sticking with Rubycon MCZ or Panasonic FM, both proven workhorses. Maybe even Nichicon HE/HD/HM.

[PCBONEZ]

I found this snippet in Chemicon's KZJ datasheet.

>>>>>>>>>>>

The KZJ series is a new ultra low impedance series from United Chemi-Con. These capacitors are different from the standard low impedance capacitors, as they use a new low resistivity electrolyte. Compared to our KZG series that also uses this advanced electrolyte technology, the KZJ series has lower ESR/impedance and higher ripple current capability, making them ideal for use in computer motherboard circuits where very low impedance at high frequencies is required.

<<<<<<<<<<

KZG don't like heat.
KZJ may turn out to have the same problem.

.