"Jeff Liebermann is a radio ham Lunatic "


No, No, and no. They're the absolute maximum operating temperature,
at which the maximum safe applied voltage hits zero.

** Complete crap.

85C, 105C and 125C are max usable temperatures at the rated DC voltage.


Wrong. A capacitor only draws current when the voltage across the
leads changes.

** What about leakage ?


The capacitor only dissipated power, and converts it
to heat, when the voltage changes. Pure DC across a capacitor does
nothing to produce heat.


** What about leakage ??

2mA of leakage times 500 volts = 1 watt.

Dickhead radio ham.


Ignoring frequency dependent effects, the power dissipated is:
Power = Ripple_voltage^2 / ESR
or
Power = Ripple_current^2 * ESR
where ESR = equivalent series resistance. For example, the CPU filter
caps are typically 1000uF/6.3V electrolytics (0.12 ohms ESR). With a
current probe, I can usually see at least 4A average ripple current on
the CPU power leads. While trying to keep the voltage constant over
such large current variations, each cap would smoke:
P = 4^2 * 0.12 = 2 watts each.


** ESR is not a fixed number - it varies dramatically with temperature.

The ESR measured at room temp is typically 5 to 10 times higher than when
the cap at say 80C. Check this out with any electro, an ESR meter and hot
air any time you like - electrolytes become way more conductive when HOT.

This makes nonsense of your calculation.


Look at Fig 13 in the URL I cited. At 85C, the maximum working
voltage is zero.


** Complete crap.

All electros are speced for full voltage at max rated temp.

But at max temp, the rated life is typically only a few thousand hours -
before the electrolyte vanishes.


.... Phil