Strange Lelon cap in a APC Back-UPS CS

[imp]

Curious as I am, I decided to have a look into one of my UPS as the battery was bad and needed replacement. There were not much capacitors in it at all, mostly Jamicon and this strange Lelon which I can´t seem to find any data on the net at all .... It´s a 450V 10 uF radial and not bulged or bad in any way, just curious if I choose to replace it later for fun

What do you guys think?

[kc8adu]

Re: Strange Lelon cap in a APC Back-UPS CS

iirc thats the one that leaks and burns a hole in the board.sometimes causes a fire.
check the recall status of your unit.

[mariushm]

Re: Strange Lelon cap in a APC Back-UPS CS

The TNY chip on the right is a switching power supply, doing about 4-10 watts of power.
Basically AC goes through the 4 diodes on the left and gets rectified to AC x 1.41, goes through the 10uF capacitor, then into the tny chip and out comes something like 5-12v @ 1-2 A

So there's no high frequency there, it's just 100-120 Hz, the capacitors shouldn't be stressed too much with ripple... I think your only concern should be that the circuit is probably running 24/7 and the diodes near the capacitor may be hot and drying out the capacitor in time.

[imp]

Re: Strange Lelon cap in a APC Back-UPS CS

Hmm, really? I have a dozen of these at various locations, even at work

I don´t think APC will recall/replace my particular as they are several years old now? I rather change the capacitor myself

To the problem - data about the RXF. It looks like Lelon low esr series but how necessary is this when it´s a high voltage capacitor with only 10 uF capacitance? Can I replace this with a UCC KMG or is there a better choice?

[imp]

Re: Strange Lelon cap in a APC Back-UPS CS

Interesting info mariushm, I suspected it´s the primary cap but now I´m sure.

I´m a bit puzzled regarding Lelon and their quality, especially as they begin to turn up in industrial electronics at work (the paper-less recorder Eurotherm 6100A for example which we have plenty of), even Teapos are beginning to show up in high quality german PSU´s....

[imp]

Re: Strange Lelon cap in a APC Back-UPS CS

"The affected units were manufactured between November 2000 and December 2002. The units were sold primarily through computer and electrical distribution, catalog and retail outlets worldwide. "

http://www.smallbusinesscomputing.co...r-Products.htm

Mine are from 2007 and on