Please excuse the possibly simple question but this is all a bit new to me.
I have an APC Smart UPS 1000 which has a very large/tall 2700uF 40V capacitor on the battery (24V) connector. Not knowing how good all the capacitors are and having already ‘melted’ a set of new batteries, I have exchanged all of the electrolytic capacitors on the board as this is recommended to resolve overcharging problems.
The problem is that the new 2700uF 40V electrolytic is TINY compared to the original.
Does it matter? Surely a 2700uF 40V cap is still a 2700uF 40V cap no matter how big it is? Or is there a reason why the old cap would have been spec’d To be BIGGER?
OK, a bit more information which, hopefully, will get me closer to a solution...
Thanks for your answers.
The original caps are EPCOS B41848-A7278-Z which is TDK, from what I can find online. The problem is that I can not find a spec sheet.
If anyone knows the specs for these caps, can you let me know please?
I have found some Nichicon GU series caps at RS which match the snap pin dimensions. They are 50V rather than 40V but, otherwise, are 2700uF.
Does anyone know enough about APC Smart-UPS design to be able to say whether they are suitable?
Point me in the direction of somewhere where I can buy the correct/matching caps?