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T491B106K016ZT Fiches technique(PDF) 13 Page - Kemet Corporation |
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T491B106K016ZT Fiches technique(HTML) 13 Page - Kemet Corporation |
13 / 24 page © KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 (864) 963-6300 • www.kemet.com T2005_T491 • 6/12/2014 13 13 Tantalum Surface Mount Capacitors – Standard Tantalum T491 Series Industrial Grade MnO2 Recommended Voltage Derating Guidelines -55°Cto85°C 85°Cto125°C % Change in Working DC Voltage with Temperature VR 67% of VR Recommended Maximum Application Voltage 50% of VR 33% of VR Ripple Current/Ripple Voltage Permissible AC ripple voltage and current are related to equivalent series resistance (ESR) and the power dissipation capabilities of the device. Permissible AC ripple voltage which may be applied is limited by two criteria: 1. The positive peak AC voltage plus the DC bias voltage, if any, must not exceed the DC voltage rating of the capacitor. 2. The negative peak AC voltage in combination with bias voltage,ifany,mustnotexceedtheallowablelimitsspecifiedfor reverse voltage. See the Reverse Voltage section for allowable limits. The maximum power dissipation by case size can be determined using the table at right. The maximum power dissipation rating stated in the table must be reduced with increasing environmental operating temperatures. Refer to the table below for temperature compensation requirements. Temperature Compensation Multipliers for Maximum Ripple Current T≤25°C T≤85°C T≤125°C 1.00 0.90 0.40 T= Environmental Temperature Using the P max of the device, the maximum allowable rms ripple current or voltage may be determined. I(max) = √P max/R E(max) = Z √P max/R I = rms ripple current (amperes) E = rms ripple voltage (volts) P max = maximum power dissipation (watts) KEMET Case Code EIA Case Code Maximum Power Dissipation (P max) mWatts @ 25°C w/+20°C Rise A 3216–18 75 B 3528–21 85 C 6032–28 110 D 7343–31 150 X 7343–43 165 E 7360–38 200 S 3216–12 60 T 3528–12 70 U 6032–15 90 V 7343–20 125 W 7343-15 180 T510X 7343–43 270 T510E 7360–38 285 The maximum power dissipation rating must be reduced with increasing environmental operating temperatures. Refer to the Temperature Compensation Multiplier table for details. 0% 20% 40% 60% 80% 100% 120% -55 25 85 125 % Change in Working DC Voltage with Temperature Temperature (ºC) 67% 33% Recommended Maximum Application Voltage (As % of Rated Voltage) R = ESR at specified frequency (ohms) Z = Impedance at specified frequency (ohms) |
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