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138D686X0006C2 Datasheet(PDF) 7 Page - Vishay Siliconix

Part # 138D686X0006C2
Description  Wet Tantalum Capacitors Sintered Anode TANTALEX Capacitors Hermetically-Sealed with True Glass-to-Tantalum Seal
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Manufacturer  VISHAY [Vishay Siliconix]
Direct Link  http://www.vishay.com
Logo VISHAY - Vishay Siliconix

138D686X0006C2 Datasheet(HTML) 7 Page - Vishay Siliconix

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61
138D
Vishay
Document Number: 40025
Revision 15-Oct-03
For technical questions, contact wettants@vishay.com
9.
Life Test: Capacitors are capable of withstanding a
2000 hour life test at a temperature of + 85
°C or
+ 125
°C at the applicable rated DC working voltage.
10.
High Frequency Vibration: Capacitors shall with
stand vibration from 10Hz to 2000Hz at 20g when
tested.
11.
Lead Pull Test: Capacitors shall withstand a lead
tensile stress of 3 pounds (13.2N) for 30 seconds,
applied axially.
12.
Marking: Capacitors shall be marked with Sprague
®
and/or the Sprague
® trademark 2, the Sprague® type
(138D); rated capacitance and tolerance (the tolerance
shall be coded, using the list shown in How to Order);
rated DC working voltage at + 85
°C; the standard EIA
date code of manufacture.
LEAKAGE AS A FUNCTION OF VOLTAGE &
TEMPERATURE
Percent of Rated Voltage
GUIDE TO APPLICATION
1.
Ripple Current: All capacitors will withstand rms ripple
currents as listed for each capacitor.
1.1.
The rms ripple current rating is independent of
temperature or frequency within the following
limitations:
1.1.1. At frequencies of less than 120Hz, the rated rms ripple
current must be multiplied by the factors shown:
PERFORMANCE CHARACTERISTICS (Cont’d)
At 120Hz, the above equation becomes:
DF =
R x C
13.26
For example, percent dissipation factor of a 30
µF, 6
volt capacitor, which has a maximum ESR of 3.4 ohms
at + 25
°C and 120Hz, would be calculated as shown:
DF = 2
π x 120 x 3.4 x 30
=
3.4 x 30
104
13.26
= 7.7%
7.
Leakage Current: Measurements shall be made at
the applicable rated working voltage at + 25
°C ± 5°C
through application of a steady source of power, such
as a regulated power supply. The total resistance in
series with each capacitor shall be between 1000 ohms
and 10,000 ohms. The voltage shall be applied to the
capacitor for 5 minutes before making the leakage
current measurement.
7.1.
The maximum leakage current for any capacitor shall
not exceed the value in microamperes listed in the
Standard and Extended Ratings Table for each
capacitor.
Note: leakage current varies with applied voltage. See graph below
for the appropriate adjustment factor.
FREQUENCY IN HERTZ
25
50
60
100
0.36
0.59
0.65
0.88
1.1.2 The sum of the peak AC voltage plus the DC voltage
shall not exceed the DC working voltage of the
capacitor.
1.1.3 The sum of the negative peak AC voltage, plus the
applied DC voltage shall not allow a voltage reversal.
2.
Cleaning wiring boards with Type 138D capacitors:
Customary cleaning solvents used in the electronics
industry at present will not affect Type 138D capacitors.
However, the use of ultrasonic cleaning techniques is
not recommended under any circumstances.
3.
Apparent Capacitance: Note that in timing circuit
applications, the circuit designer must take into account
two important variables which affect any electrolytic
capacitor. These are the internal leakage resistance
of the capacitor and its dielectric absorption, which will
depend on the elapsed time since the capacitor was
last energized.
In applications where electrolytic capacitors are
subjected to DC energy, or in effect, extremely low
frequencies, the value of the apparent capacitance will
be somewhat higher than that which is measured at
120HZ.
4.
No Reverse Voltage: The application of reverse
voltage to these capacitors will cause internal damage.
The resulting damage will lead to immediate or delayed
failure of the unit.
This will take the form of a
catastrophic short circuit with possible expulsion of the
electrolyte.
8.
Low Temperature Impedance: The impedance of any
capacitor at - 55
°C at 120Hz, shall not exceed the
values given in the Standard and Extended Ratings
Tables.
Wet Tantalum Capacitors
Sintered Anode TANTALEX
® Capacitors Hermetically-Sealed
with True Glass-to-Tantalum Seal


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