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TemperatureLoss factor temperature dependanceThe dissipation factor of capacitors with a polypropylene dielectric is largely unaffected by temperature, whereas polyester capacitors show a characteristic dissipation factor minimum at approx. 80 C (at 1 kHz).
If a capacitor is subjected to a temperature cycle from the reference temperature to Tmin, then up to Tmax and back to the reference temperature, a small irreversible change may be observed between the initial and the final capacitance. This deviation is called temperature cyclic capacitance drift, and is expressed as a percentage of the reference capacitance. For film capacitors it is usually very small. Source: Epcos-TDK, modified by Garmanage: Roland Gallay
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