Take a look at the nice Epcos capacitor in the attachment.
450V, 3300uF, said to be of high quality.
Notice anything strange?
If you do, lucky you.
If not, you might think that the band means negative terminal, as on every other electrolytic capacitor i've ever seen in my life.
Turns out it's a wrong assumption.
This one have the band on the positive side.
So, it was under about 150V for like 10 seconds while i stared at the dials doing
- about 8A appear to just vanish into nowhere.
A few pokes shown that the capacitor was not holding the charge, and i swapped it out, preparing hot words for the seller about quality of parts they sell
Some time later i took a closer look, and noticed the unusual polarity
So, the question is - is that capacitor still fine, after a brief reversal (10-20 seconds total under 150V)?
I can't quite find any definite info - some places state immediate decomposition, some state short-term survival, some state reversible damage if the voltage wasn't too high.
It's somewhat expensive, so i wouldn't want to get a new one, but the rest of the circuit is way more expensive, so i don't want to take too much chances either.