CV Capability Guide - AVX

Medium Power Film CapacitorsFFB (RoHS Compliant)The FFB series uses a non-impregnated metallized polypropyleneor polyester dielectric with the controlledself-healing process, specially treated to have a very highdielectric strength in operating conditions up to 105°C.The FFB has been designed for printed circuit board mounting.Its performance allows the FFB to be a very interesting alternativeto electrolytic technology as it can withstand much higherlevels of surge voltage.APPLICATIONSThe FFB capacitor is particularly designed for DC filtering, lowreactive power.HOT SPOT CALCULATIONSee Hot Spot Temperature, page 3.Check for up-to-date CV Tables athttp://www.avx.com/docs/catalogs/filmcaps.pdfPACKAGING MATERIALSelf-extinguishing plastic case (V0 = in accordance with UL 94)filled thermosetting resin.Self-extinguishing thermosetting resin (V0 = in accordance with UL94; I3F2 = in accordance with NF F 16-101).STANDARDSIEC 61071-1, IEC 61071-2: Power electronic capacitorsIEC 60384-16: Fixed metallized polypropylenefilm dielectric DC capacitorsIEC 60384-16-1: Fixed metallized polypropylenefilm dielectric DC capacitorsAssessment level EIEC 60384-17: Fixed metallized polypropylenefilm dielectric AC and pulsecapacitorsIEC 60384-17-1: Fixed metallized polypropylenefilm dielectric AC and pulsecapacitorsAssessment level EIEC 60384-2: Fixed metallized polyester capacitorsθ hot spot = θ ambient + (P d + P t ) x R thwith P d (Dielectric losses) = Q x tgδ 0Q x tgδ 0 ⇒ [ 1 ⁄2 x C n x (V peak to peak ) 2 x f ] x tgδ 0tgδ 0 (tan delta)For polypropylene, tgδ 0 = 2 x 10 -4 for frequenciesup to 1MHz and is independent of temperatures.For polyester, tgδ 0 values are shown in graph 4 onpage 3.P t (Thermal losses) = R s x (I rms ) 2where C n in Farad I rms in Ampere f in HertzV in Volt R s in Ohm θ in °CR th in °C/WWORKING TEMPERATURE(according to the power to be dissipated) -55°C to +105°CLIFETIME EXPECTANCYOne unique feature of this technology (as opposed to electrolytics)is how the capacitor reacts at the end of its lifetime. Unlikealuminum, electrolytic film capacitors do not have a catastrophicfailure mode. Film capacitors simply experience a parametricloss of capacitance of about 2%, with no risk of short circuit.Please note that this is theoretical, however, as the capacitorcontinues to be functional even after this 2% decrease.HOW TO ORDERFFB 1 4D0336K––SeriesCaseSize12345Dielectric4 = Polyester6 = PolypropyleneVoltageCodeD = 75VdcE = 100VdcH = 300VdcI = 400VdcJ = 525VdcA = 720VdcC = 900VdcL = 1100VdcCapacitanceCode0 + pF code0336 = 33μF0686 = 68μF0117 = 110μFetc.CapacitanceTolerancesK = ±10%Lead Styles– – = 2 LeadedJC = 4 LeadedConsult Factoryfor SpecialOptionswww.avx.com | 161