Therefore,thelossfactor(df)ofelectrolyticcapacitorsisalsoknownaslossangletangentinmanytechnicalliteratures.Themainvoltageindexesofaluminumelectrolyticcapacitorarerateddcvoltage,ratedsurgevoltage,instantaneousovervoltageandreversevoltage,anddcvoltage,vrvoltage,dcvoltagevristhecontinuousoperatingvoltageofcapacitorintherangeofratedtemperature.ItincludesthesumofDCvoltage,pulsatingvoltageorcontinuouspulsevoltagebetweentwoelectrodesofacapacitor.Generally,theratedvoltageoftantalumcapacitorsismarkedonthesurfaceofcapacitors.Usuallyratedvoltage≤100vt491b107m004atis"lowvoltage"tantalumcapacitor,andratedvoltage≥150vis"highvoltage"capacitor[1].)