This test procedure determines the expected wear-out lifetime for aluminum electrolytic capacitors. It provides a measure of the operating time required for parametric changes to cause capacitors to become unusable as filter capacitors on rectified mains applications. While it measures the time till wear-out, it does not indicate failure rate during the operating life. Wear-out is defined by conditions specified in table 1. Measurements are to be taken periodically and the measurements are to be taken at the same temperature throughout the test.