Datasheet

7© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard A4002_EEV • 11/6/2019
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
Surface Mount Aluminum Electrolytic Capacitors – EEV, +105°C
Mounting Positions (Safety Vent)
Inoperation,electrolyticcapacitorswillalwaysconductaleakagecurrent,whichcauseselectrolysis.Theoxygenproduced
byelectrolysiswillregeneratethedielectriclayerbut,atthesametime,thehydrogenreleasedmaycausetheinternal
pressureofthecapacitortoincrease.Theoverpressurevent,orsafetyvent,ensuresthatthegascanescapewhenthe
pressurereachesacertainvalue.Allmountingpositionsmustallowthesafetyventtoworkproperly.
Installing
• Asageneralprinciple,lower-usetemperaturesresultinalonger,usefullifeofthecapacitor.Forthisreason,itshouldbe
ensuredthatelectrolyticcapacitorsareplacedawayfromheat-emittingcomponents.Adequatespaceshouldbeallowed
betweencomponentsforcoolingairtocirculate,particularlywhenhighripplecurrentloadsareapplied.Inanycase,the
maximumcategorytemperaturemustnotbeexceeded.
• Donotdeformthecaseofthecapacitorsorusecapacitorswithadeformedcase.
• Verifythattheconnectionsofthecapacitorsareabletoinsertontheboardwithoutexcessivemechanicalforce.
• Ifthecapacitorsrequiremountingthroughadditionalmeans,therecommendedmountingaccessoriesshallbeused.
• Verifythecorrectpolarizationofthecapacitorontheboard.
• Verifythatthespacearoundthepressurereliefdeviceisaccordingtothefollowingguideline:
Case Diameter Space Around Safety Vent
≤16mm > 2 mm
>16to≤40mm > 3 mm
> 40 mm > 5 mm
Itisrecommendedthatcapacitorsalwaysbemountedwiththesafetydeviceuppermostorintheupperpartofthecapacitor.
• Ifthecapacitorsarestoredforalongtime,theleakagecurrentmustbeveried.Iftheleakagecurrentissuperiortothe
valuelistedinthiscatalog,thecapacitorsmustbereformed.Inthiscase,theycanbereformedbyapplicationoftherated
voltagethroughaseriesresistorapproximately1kΩforcapacitorswithV
R
≤160V(5Wresistor)and10kΩfortheother
rated voltages.
• Inthecaseofcapacitorsconnectedinaseries,asuitablevoltagesharingmustbeused.
Inthecaseofbalancingresistors,theapproximateresistancevaluecanbecalculatedas:R=60/C.
KEMETrecommends,nevertheless,toensurethatthevoltageacrosseachcapacitordoesnotexceeditsratedvoltage.