This specification covers the general requirements for established reliability (ER) and non-ER,
aluminum oxide, electrolytic, fixed capacitors (see 6.1). Capacitors meeting the ER requirements of this
specification have reliability established on the basis of life tests performed at rated voltage at 85°C for failure rate
(FR) levels ranging from 1.0 percent to 0.001 percent per 1,000 hours in accordance with MIL-STD-690. These FR
levels are established at a 60-percent confidence level and are maintained at a 10 percent producer’s risk. The
level of reliability is identified by the following FR level symbols