The ESR of OS-CON capacitors change little with temperature. In this respect OS-CON capacitors are as good or better than good ceramic capacitors. Manufactures often specify the impedance ratio at two temperatures. From the datasheets it is known that at 20 C and 100 kHz, the ESR is 60 m W , and that the impedance at 100 C is 0.9 times the impedance at 20 C. Solution . Click here for more detail .
Electrolytes deteriorate over time, a process that is enhanced at elevated temperatures.
However, some of the claims with regard to the superior longevity of OS-CON capacitors may be overstated. For example, the lifetime of an aluminum electrolytic capacitor tends to be inversely proportional to the physical dimensions. That is, smaller capacitors have a shorter life span. Large Leakage Currents . OS-CON capacitors have large leakage currents making them unsuitable for use in voltage retention circuits, anything but very crude time constant circuits, coupling circuits, or any circuit where leakage current is a major concern.