Too often we get / give the advice to replace all electrolytic capacitors on a PCB when it starts to malfunction (like in DVD player power supply circuit strange behavior. Need help to understand root cause but here are many more examples). Reason seems to be the huge difference in quality for these capacitors. And more often than not, replacing caps actually solves the problem.
Now it occurred to me that some devices just appear to live forever (knock on wood), where others fail in two or three years. With new brands coming and old brands going, compiling a list of good/bad brands is a hopeless exercise, so the question is:
How do I know a decent/good quality electrolytic capacitors, before I buy them?
- I know the brand (by calling/mailing the shop);
- The parts are genuine, non-counterfeits;
- Fresh parts; short shelf life (no expired "best before" date)