First, here is the definition of the rated temperature and rated voltage of a component. The rated temperature of a component is the maximum temperature at which the device can be used without lowering the voltage rating of the component. It is often lower than the category temperature, but can be equal. The rated voltage of a component is the maximum peak DC operating voltage for continuous operation, up to the rated temperature. Rated voltage is the labeled voltage of the device. In the example shown on this slide a 50V rated capacitor would be considered 50V up to 85ºC.