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ALN20S Series 85°C• 4 Pin Solder tag• Long Life 18000 hours at 85 °C(Ur, Ir applied)• Slit Foil technologyRoHSCompliantapplicationBasic designA new generation of audio capacitors is nowavailable from BHC – T-Network Capacitor(TNC). The TNC has been designedspecifically for audio applications by DNMdesign and is being manufactured in the UKby BHC.In a normal capacitor unwanted resistanceand inductance force the input and outputtogether electrically, making its unwantedcharacteristics very critical for performance- figure 1.The new T-Network capacitor (TNC) behavesdifferently because the input must flow alongthe capacitor plate to reach the output.The signal is forced into pure capacitancewith most of the unwanted resistance andinductance appearing on each side of thebulk capacitance. The residual defects,therefore, tend to assist capacitance filteringin the T-Network design - figure 2.The TNC is designed for the most demandingfiltering situations and it will redefineperformance standards in many non-audioapplications. For use in audio amplifiers, theTNC incorporates current slit foil technologyto produce the ultimate audio capacitor.These capacitors give excellent resultsagainst standard components on a directreplacement. However, TNC high frequencyperformance is so enhanced that the H.F.compensation of test amplifiers may needresetting for best results.Figure 1: Conventional capacitorFigure 2: T-Network capacitorSpecificationStandards IEC 60384-4Capacitance range 10000 µFCapacitance toleranceRated voltage U RSurge voltage U SLeakage current I LOperational life time+85°C, U R, I R+85°C, U R±20% (-10% +30% where specified)50 - 100 VDC1.15 x U R= 0.006 x C Rx U R(µA) or 6mA whicheveris the smaller. Note, C Ris in µF.18000 hours29000 hoursTest Condition:< 30s surge, 1000 cycles @ 85°CTest Condition:U R, 5mins., 20°CEnd of Life requirement:∆C/C < ±10%ESR < 2 x initial ESR value< initial specified limitI LShelf Life2000 hrs at 0V +85°C, or 30000 hrs at 0V +40°CTemperature range–40 to +85°C (Operating) -55°C to +85°C (Storage)