Electro - Caps is it true they last longer at lower temperatures

Virtually everything lasts longer at lower temperatures. At 0K everything lasts forever!

As for how much longer, here's a quote from Wikipedia:
Since the electrolytes evaporate, design life is most often rated in hours at a set temperature. For example, typically as 2000 hours at 105 degrees Celsius (which is the highest working temperature). Design life doubles for each 10 degrees lower, reaching 15 years at 45 degrees.


2004-10-13 1:33 am
Yep, double life for every 10C drop. I spent a lot of time measuring cap temperatures and calculating lifetimes while designing motor drive electronics for a washing machine manufacturer. The ripple current heating calcs were truly hideous, once you started adding harmonics.


2005-07-02 8:17 pm
65N 25E
sam9 said:
Speaking of electros, when they fail (catastrophically) do they tend to fail short or open?

Normal failure is increase in internal resistance, but this is not so catastrofic, usually leading to reduced performance and ultimately completely non-functionin circuit.

Tantals are more famous of their violent behaviour, overvoltage spikes or reverse polarity causes them to short-circuit and explode violently.
Lytics when failing catastrophically tend to short. Over time they dry out, but that would not be considered a right now failure.

Opens in my experience are more likely mechanical failure, probably due to stress on the lead coming out. Vibration can break the lead off of the innards.

But they can dry out to the point that they do little or nothing.