Paul' capacitor FAQ

[Rich Nelson]

It should also be noted that polarized electrolytic caps SHOULD NOT be
used where the DC potential across the cap is substantially below the
rated working voltage.  Some people might assume that doing so provides
a safety margin.  But since the dielectric is "formed" by the voltage
applied across the capacitor, they will lose capacitance when operated
much below their rated voltage.

This is why voltage ranges are relatively small 6.3, 10, 16, 25, 35, 50,
etc.  Pick the voltage rating the next step higher than the __ peak __
voltage across the cap.

rich
<<pantechnicon>>