Chemicon PSC series life span

[bestsystem]

I found 2 datasheets saying different lifespan

One said 15,000 hours


Another said 2,000 hours only



And i'm trying to figure out how long will mine one last, it makes a huge difference!

[mariushm]

Re: Chemicon PSC series life span

Either one will be fine.
Polymer capacitors have much higher life compared to electrolytics.

electrolytic capacitors: double lifetime rating for every 10c decrease in ambient temperature from maximum rating

polymer capacitors : Lifetime = Original Lifetime x 10 ^ [ (Tmax - Tambient) / 20 ]

So let's say capacitor is at 55c all the time:

2000h @ 105c electrolytic: 4000h@95c, 8000h@85c, 16k @ 75k , 32k @65, 64k @ 55c = 2666 days = ~ 7.3 years

2000h @ 105c polymer : 2000 * 10 ^ [( 105-55)/20)] = 2000 x 10^ (50/20) = 2000 x 10^2.5 = 2000 x 316 = ~ 632.000 hours = ~ 26333 days = ~ 72 years

In reality, they all may break after around 25-30 years due to the rubber bottom breaking down (micro cracks, oils seeping out etc)

[Per Hansson]

Re: Chemicon PSC series life span

These and the PSG series where uprated.
So you need to have recently manufactured caps to have the increased lifespan rating...

https://www.badcaps.net/forum/showthread.php?t=65732