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T490T227M010AT Datasheet(PDF) 7 Page - Kemet Corporation

Part # T490T227M010AT
Description  Tantalum Surface Mount Capacitors ??Standard Tantalum Commercial Grade MnO2
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Manufacturer  KEMET [Kemet Corporation]
Direct Link  http://www.kemet.com
Logo KEMET - Kemet Corporation

T490T227M010AT Datasheet(HTML) 7 Page - Kemet Corporation

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© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 • 864-963-6300 • www.kemet.com
T2004_T490 • 9/22/2016
77
Tantalum Surface Mount Capacitors – Standard Tantalum
T490 Series Commercial Grade MnO2
Recommended Voltage Derating Guidelines
−55°Cto40°C
% Change in Working DC
Voltage with Temperature
100% of VR
VR
Recommended Maximum
Application Voltage
50% of VR
VR
40°C to 85°C
% Change in Working DC
Voltage with Temperature
50% of VR
VR
Recommended Maximum
Application Voltage
50% of VR
VR
85°C to 125°C
% Change in Working DC
Voltage with Temperature
20% of VR
VR
Recommended Maximum
Application Voltage
20% of VR
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, if any, must not exceed the allowable limits
specifiedforreversevoltage.SeetheReverseVoltage
section for allowable limits.
Themaximumpowerdissipationbycasesizecanbe
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≤40°C
T≤85°C
1.00
0.90
0.40
T= Environmental Temperature
The maximum power dissipation rating must be reduced with increasing
environmental operating temperatures. Refer to the Temperature
Compensation Multiplier table for details.
KEMET
Case Code
EIA
Case Code
Maximum Power
Dissipation (P max)
mWatts at 25°C
w/+20°C Rise
A
3216–18
75
B
3528–21
85
T
3528–12
70
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)
R = ESR at specified frequency (ohms)
Z = Impedance at specified frequency (ohms)
0%
20%
40%
60%
80%
100%
120%
−55
25
40
85
105
125
Temperature (°C)
50%
20%
% Change in Working DC
Voltage with Temperature
Recommended Maximum
Application Voltage


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