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EETXB2D271B Datasheet(PDF) 4 Page - Panasonic Semiconductor |
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EETXB2D271B Datasheet(HTML) 4 Page - Panasonic Semiconductor |
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4 / 37 page  1 General Specifications Capacitance Nominal capacitance is specified at 120Hz frequency and 20°C temperature. Unless specified otherwise, standard capacitance tolerance is ±20% of the nominal value. Working Voltage The maximum allowable sum of continuous DC voltage plus peak ripple voltage which can be applied to the capacitor. Surge Voltage The maximum transient voltage level allowed for short periods of time without sustaining permanent damage to the capacitor. Values are listed in the standard product ratings. Leakage Current (µA) maximum after 5 minutes of I = 3 CV applying rated voltage. Capacitance is the nominal value in µF, voltage in VDC. Ripple Current The standard product tables list ripple current allowable limits at specified maximum operating temperatures. Correction factors for other temperatures and frequencies are listed in the general sections for the general product type. Endurance (Life) Test Duration: Specified hours of life Ambient Temp.: Maximum specified operating temperature Applied Voltage: DC voltage with maximum specified ripple current applied (the sum of the applied DC voltage plus the peak ripple voltage should not exceed rated working voltage) Post test requirements at +20°C: Leakage Current: ≤ Initial specified value Cap. change: ≤ ±20% of initial measured value D. F. / E.S.R.: ≤ 200% of initial specified value Shelf Life Duration: 1000 hours Ambient Temp.: Maximum specified operating temperature Applied Voltage: None Post test requirements at +20°C: Same as Endurance Test requirements above. Measurements are to be performed after applying DC working voltage for 30 minutes. 2 Life Expectancy Panasonic capacitors have a specified life at a maximum temperature and ripple current. Typical life can be considerably longer based on actual life test results performed by the factory. This data can be provided to help the designer estimate expected life. This information is given with a 60% confidence level. Capacitor life at lower temperatures follows "The Doubling 10°C Rule" where life is doubled for each 10°C reduction in operating temperature. The following equation is useful for determining the life of a capacitor in the application; L2 = L 1 × 2 T1 −(T2+∆T) 10 where: L 1 = Specified life (hours) at maximum operating temperature. Typical life may be substituted (at a 60% confidence level). L 2 = Expected life (hours) at actual operating temperature. T1 = Maximum operating temperature. T2 = Ambient temperature (°C). ∆T = Ripple current temperature rise (°C). It is recommended that the ripple current heat rise be limited to 15°C at lower ambient temperatures as higher temperature rises may reduce operating life. End of life is defined by the occurrence of one of the following when stabilized at 20°C; Capacitance change exceeds ±20% of the initial measured value. Dissipation Factor exceeds 200% of the initial specified value. 4 Aluminum Electrolytic Capacitors |
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