I assume your talking about the Jensen oil cap web site. The specification listed is the breaking point, when subjected to maximum temperature for 250 hours.
A few rows up from where you got your numbers, the maximum temperature is listed as 185 degrees F.
Unless the cap is put in an extremely high bias circuit or next to a tube, it is unlikely to be subjected to this temperature extreme. Many are purchased for speakers where this is not an issue.
A few rows up from where you got your numbers, the maximum temperature is listed as 185 degrees F.
Unless the cap is put in an extremely high bias circuit or next to a tube, it is unlikely to be subjected to this temperature extreme. Many are purchased for speakers where this is not an issue.