As I know, tant cap and e. cap are also the selection for high capacitance value under high voltage rating's condition. But due to the principle of e. cap, it requires some liquid inisde itself to provide capacitance. So if the circuit's ambient temperature is high, that may vaporize the liquid and cause the e. cap malfunction. So I was told that use tant cap if the ambient temperature is always high as tant cap can provide higher reliablility and more durable. But on ther other hand, I also see some e. cap. marked with long life, or high temperature rating, and some of them are also specified it can work for more than 5k hours under maybe 85degC condition. And I also read for about the same reliability data from some tant cap's datasheet. So can anyone kindly tell / teach me the different characteristic between them and how is their applications.