23 Jan
2016
23 Jan
'16
5:40 p.m.
On 01/23/2016 01:26 AM, Tothwolf wrote:
They can. The translucent yellow Rifa (now owned by Kemet) class X/Y
safety capacitors in particular have a 100% failure rate and are on my
replace-on-sight list. They usually begin to show visible signs of
cracking in their outer casing before they finally go out with a bang.
It seems to be due to chemical decomposition of the paper insulator
which swells over time and causes the case to crack. I usually replace
them with a film capacitor from Epcos of the same value and safety class.
I have heard similar from a few other places. And I'm replacing a five
of these in a bigger SGI PSU as preventive maintenance. A few of them
are showing cracks.
All I could find were new similar Kemet capacitors. Do you know if newer
Kemet suffer from the same problem and I will regret buying them?
Thanks,
Pontus.