Hello all
I found many electrolytic capaciutors in my vintage amp which degraded and need to be replaced. but many of them labeled strange voltage rating as "1000uf 40/48V"
.
So, what is the meaning of "/" at the voltage rating of the cap?
Thank you
I found many electrolytic capaciutors in my vintage amp which degraded and need to be replaced. but many of them labeled strange voltage rating as "1000uf 40/48V"
.
So, what is the meaning of "/" at the voltage rating of the cap?
Thank you
There used to be a surge rating for electrolytic capacitors, so the 48V may be that.
When replacing them with modern parts, use 50V or higher.
When replacing them with modern parts, use 50V or higher.
Just an FYI: A surge rating is still (technically) a thing even on modern electrolytics - just not prevalent on data sheets. You can find it mentioned in some manufacturer's design notes or other technical documents but the only standard datasheets that tend to give a value for it are ones for the larger screw terminal can capacitors. It is typically 10-20% larger than the rated voltage and is usually the forming voltage used during the manufacture of the capacitors. I would guess that the reason you just don't see it given obviously any more is for liability reasons - too many half-a$$ed designers that don't understand that there are very strict limitations on the frequency and duration of the over voltage events - they see xxV surge and think it can handle that several times a minute - and them blame/sue the manufacturer for "defective parts" when is doesn't.
Hal
Hal