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High Power CapacitorsCalculation FormDESIGNSpecificationYour ChoiceCapacitanceWorking voltageRms currentFrequencyRipple voltageAmbient temperatureLifetime @ Vw,Irms and θambParasitic inductanceCooling conditionsC (µF)Vw (V)Irms (Arms)F (Hz)Vr (V)θamb ( C)hoursL (nH)PNCapacitanceNominal voltageSerial resistanceThermal resistance betweenhot spot and caseThermal resistance betweencase and ambient airC (µF)Vn (V)Rs (mΩ)Rth1 ( C/W)Rth2 ( C/W)CalculationsMaximum ripple voltageVrmax 0.45VnVr VThe maximum ripple voltage must be in any case lower than the ripple voltageRatio Vw/VnJoule lossesDielectric lossesHot spot temperatureρ Vw/VnPj Rs x Irms2Pd Q x tgδ0 Q x 3.10-4θHS θamb (Pj Pd) x (Rth1 Rth2)ρ Pj Pd θHS WW CThe hot spot temperature must be in any case lower than 85 CLIFETIME EXPECTANCY VS HOT SPOT TEMPERATURE AND VOLTAGE1.71.61.5 HS 50 CVw/Vn1.41.3 HS 70 C1.21.1 HS 85 C1 HS 80 C0.90.8100100010000Lifetime Expectancy (hours)Expected lifetime at hot spot calculated and V Vw281000001000000
DISFIM ProductsFor Energy Storage and Discharge ApplicationsBased on the CONTROLLED SELF HEALING technology,AVX offers impregnated capacitors, named DISFIM, whichare ideal for discharge applications.With the controlled self-healing technology, the capacitanceof the DISFIM is divided into several million elementarycapacitances. The weak points in the dielectric are insulatedand the capacitor continues to work without any short-circuitor risk of explosion.DISFIM capacitors may represent more than 10,000 squaremeters.Only some square millimeters of active surface are lost forevery self-healing action.Over the life of the capacitor, the capacitance graduallydecreases.The capacitor is usually designed to lose less than 5% of itsinitial capacitance during its whole lifetime.Example of design with 2 epoxide flat terminalsAPPLICATIONSPower laserHigh voltage suppliesCable failure detectionCHARACTERISTICSElectromagnetic and ETC gunsMarx generatorsWelding machineCustom design is the rule as applications andoperating conditions are various.Feel free to send your request to your local AVXrepresentative.Use guide for customer’s specific requirement.Voltage range from 2kV to 75kVMaximum energy per can 150kJSpecific energy up to 2000J/lLifetime up to several tens millions shotsStray inductance from 50nH to 500nHCONSTRUCTIONMetal case unitEpoxide flat terminals or ceramic terminals29
High Power CapacitorsGuide for Customer’s Specific RequirementsThis questionnaire lists the information we require to prepare an offer according to your exact requirementsCompany / Name / EmailProject / QuantityApplicationsDC FilteringDischarge*Protection*TuningCapacitance (µF)Tolerance (%)Operating VoltageVpeakRipple Voltage (peak to peak)VchVpeakVdcVrmsArmsArmsVWorking Frequency (Hz)Operating CurrentArmsMaximum scillatoryPulse Duration (5% lpeak)Time to lpeak (µs)Ringing Frequency (Hz)Reversal Voltage (%)Repetition Rateshots/min/hour/dayHzHold Time @ Full Voltage (s)Fault Peak Current / nb shotsApeakshotsApeakshotsFault Reversal Voltage (%)Lifetime ExpectancyhoursshotshoursMaximum Inductance (nH)Test Voltage between Terminals (V)Test Voltage between ShortedTerminals and Case (V)Maximum Surge Voltage (MSV)MSV Duration / Frequencys/years/year*Due to the particularities of varying waveforms in such application, more information on the exact nature of waveform is generally required for a full analysis.DescriptionDimensions (mm) / ShapeSection:Operating PositionTerminalsvertical, horizontalinclined,upside downtypeHeight:rectangular, cylindricalquantityThermal CharacteristicsStorage Temperature (ºC)Operating Temperature (ºC)Cooling Methodmin.min.Natural ConvectionaverageaverageForced Air (m/s)max.max.WaterRemarks30hours
AVX Products ListingPASSIVESCapacitorsMultilayer CeramicFilmGlassNiobium Oxide* - OxiCap Pulse SupercapacitorsTantalumCircuit ProtectionThermistorsFuses - Thin FilmTransient Voltage SuppressorsVaristors - Zinc OxideDirectional CouplersThin-FilmFiltersCeramicEMINoiseSAWLow Pass - Thin FilmInductorsThin-FilmIntegrated Passive ComponentsPMC - Thin-Film NetworksCapacitor ArraysFeedthru ArraysLow Inductance Decoupling ArraysPiezo Acoustic GeneratorsCeramicResistorsArraysMiniature AxialsTiming DevicesClock OscillatorsMHz Quartz rd, CustomIDC Wire to BoardHeaders, Plugs, AssembliesBoard to BoardSMD (0.4, 0.5, 1.0mm), BGA, Thru-HoleCard EdgeMemoryPCMCIA, Compact Flash, Secure Digital, MMC,Smartcard, SODIMMDIN41612Standard, Inverse, High TemperatureMilitaryH Government, DIN41612FFC/FPC0.3, 0.5, 1.0mmPolytectTMSoft MoldingHand Held, CellularBattery, I/O, SIMcard, RF shield clipsRack and PanelVariconTM2mm Hard MetricStandard, Reduced Cross-TalkFor more information please visitour website athttp://www.avx.comNOTICE: Specifications are subject to change without notice. Contact your nearest AVX Sales Office for the latest specifications. All statements, information and data givenherein are believed to be accurate and reliable, but are presented without guarantee, warranty, or responsibility of any kind, expressed or implied. Statementsor suggestions concerning possible use of our products are made without representation or warranty that any such use is free of patent infringement and are notrecommendations to infringe any patent. The user should not assume that all safety measures are indicated or that other measures may not be required. Specifications aretypical and may not apply to all applications. AVX Corporation“Niobium Oxide Capacitors are manufactured and sold under patent license from Cabot Corporation, Boyertown, Pennsylvania U.S.A.”31
The maximum ripple voltage must be in any case lower than the ripple voltage . Company / Name / Email Project / Quantity Applications DC Filtering Discharge* Protection* Tuning Capacitance (µF) . Compact Flash, Secure Digital, MMC, Smartcard, SODIMM Military H Government, DIN41612 PolytectTM Soft Molding Rack and Panel Varicon TM.
