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138D476X0125T2 Datasheet(PDF) 6 Page - Vishay Siliconix |
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138D476X0125T2 Datasheet(HTML) 6 Page - Vishay Siliconix |
6 / 8 page 138D Vishay Wet Tantalum Capacitors Sintered Anode TANTALEX® Capacitors Hermetically-Sealed with True Glass-to-Tantalum Seal www.vishay.com For technical questions, contact: wettants@vishay.com Document Number: 40025 22 Revision: 17-Mar-08 PERFORMANCE CHARACTERISTICS 1. Operating Temperature: Capacitors are designed to operate over the temperature range of - 55 °C to + 125 °C. 2. DC Working Voltage: The DC working voltage is the maximum operating voltage for continuous duty at the rated temperature. 3. Surge Voltage: The surge DC rating is the maximum voltage to which the capacitors should be subjected under any conditions. This includes transients and peak ripple at the highest line voltage. The surge voltage of capacitors rated below 150 V is 115 % of the rated DC working voltage. The surge voltage of capacitors rated at 150 V DC is 165 volts. 3.1 Surge Voltage Test: Capacitors shall withstand the surge voltage test applied through a 1000 Ω ± 10 % resistor in series with the capacitor and voltage source at the rate of one-half minute on, four and one-half minutes off, for 1000 successive test cycles at + 85 °C or + 125 °C. 4. Capacitance Tolerance: The capacitance of all capacitors shall be within the specified tolerance limits of the nominal rating. 4.1 Capacitance measurements shall be made by the bridge method at or referred to, a frequency of 120 Hz at a temperature of + 25 °C. A polarizing voltage shall be used of such magnitude that there shall be no reversal of polarity due to the AC component. The maximum AC voltage will be 1 volt rms applied during measurement. 5. Capacitance Change With Temperature: The capacitance change with temperature shall not exceed the limits given in the Standard and Extended Ratings Table for each capacitor. 6. Equivalent Series Resistance: Measurements shall be made by the bridge method at or referred to, a frequency of 120 Hz at a temperature of + 25 °C. A polarizing voltage shall be used of such magnitude that there shall be no reversal of polarity due to the AC component. The maximum AC voltage will be 1 Vrms applied during measurement. 6.1 The equivalent series resistance shall not exceed the maximum value in ohms listed in the Standard and Extended Ratings Table for each capacitor. 6.2 The dissipation factor may be calculated from the equivalent series resistance and capacitance values as shown: where: DF = Dissipation Factor in % R = ESR in ohms C = Capacitance in µF f = frequency in Hz At 120 Hz, the above equation becomes: TYPICAL CURVES OF IMPEDANCE AS A FUNCTION OF FREQUENCY AT VARIOUS TEMPERATURES - 55 - 40 - 20 + 25 + 85 0.2 1.0 10 100 200 FREQUENCY IN Hz 100 1K 10K 100K 1M 10M “K” Case 120 µF, 25 V Capacitors °C °C °C °C 125 °C - 55 - 40 - 20 + 25 + 85 +125 FREQUENCY IN Hz 100 1K 10K 100K 1M 10M 0.2 1.0 10 100 200 “C” Case 10 µF. 100 V Capacitors °C °C °C °C °C °C UP TO + 85 °C WORKING VOLTAGE (V) AT + 125 °C WORKING VOLTAGE (V) UP TO + 85 °C WORKING VOLTAGE (V) AT + 125 °C WORKING VOLTAGE (V) 6 4 35 22 8 5 50 30 10 7 60 40 15 10 75 50 20 13 100 70 25 15 125 85 30 20 150 100 DF 2 πfRC 10 4 ------------------ = DF RC × 13.26 --------------- = |
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