Datenblatt-Suchmaschine für elektronische Bauteile |
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CD29GBA Datenblatt(PDF) 7 Page - Jianghai Europe GmbH |
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CD29GBA Datenblatt(HTML) 7 Page - Jianghai Europe GmbH |
7 / 8 page 15 Assistance needed? Please contact JiAnGHAi EuroPE GmbH +49 (0)2151 652088-72 or info@jianghai-europe.com Life Time Estimation 3. K V Voltage Factor: For Radial Electrolytic Capacitors, this part of the formula has no impact (KV = 1). But for some bigger capacitors like Snap-In and Screw-Terminal types with rated voltages above 350V, the operating voltage will affect their Lifetime. It is expressed as follows: ( ) K V = U A U R -n Where: U R Rated Voltage U A Actual Operating Voltage n Exponent, defined as: 0,5 ≤ U A ≤ 1 → n = 2,5 U R 0 < U A < 0,5 → n = 0 U R 4. Frequency Correction Factors: If the actual Ripple Currents are not given at the same frequency like I 0, weighing factors need to be applied. I A Actual Rated Ripple Current (normalized) I f1 ... Ifn Ripple Currents at different frequencies F f1 ... Ffn Frequency Correction Factors for different frequencies I A = ( I f 1 ) 2 + F f 1 ( I f 2 ) 2 + F f 2 ... ( I f n ) 2 F f n L = L 0 · KT · KR · KV 5. JiAnGHAi Electrolytic Capacitor Lifetime Estimation Formula T 0-TA [1- ( I A ) 2]· ∆ T 0 U A = L 0· 2 10K · K i I R 10K · ( ) -n U R T 0 = 105°C I A > IR → Ki = 4 I A ≤ IR → Ki = 2 T 0 = 85°C → K i = 2 0,5 ≤ U A ≤ 1 → n = 2,5 U R 0 < U A < 0,5 → n = 0 U R |
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