T213A105J050ASC Kemet Corporation, T213A105J050ASC Datasheet - Page 76

• Manufacturer Part Number: T213A105J050ASC
• Description: Tantalum Hermetically Sealed / Axial
• Manufacturer: Kemet Corporation

KEMET
according to the curve of Figure 2.
6. DISSIPATION FACTOR (DF)
rms applied. Note that, in either operation, peak AC plus
DC bias must not exceed either rated voltage (normally
polarized) or 15% of rated voltage in the reverse direction
at 25°C. Measurement circuits are of high impedance,
however, and under these conditions 1 volt rms may be
applied even to 6 volt capacitors (23% peak reversal) with-
out a DC bias. DC bias is thus normally not used, except
when rated voltage is below 6 volts and the AC signal level
exceeds 0.3 vrms. However, MIL-C-39003 provides for up
to 2.2 volts DC.
measure of the resistive component in capacitors. It is the
ratio of the unavoidable resistance to the capacitive reac-
tance, usually expressed in percent. DF increases with
temperature above +25° C and may also increase at lower
temperatures. Unfortunately, one general limit for DF can-
not be specified for all capacitance/voltage combinations,
nor can response to temperature be simply stated.
Catalogs for the respective series list DF limits under var-
ious conditions.
cy as would be expected from the decreasing capacitive
reactance. DF is not a very useful parameter above about
1 kHz. The DF of larger capacitance values increases
more rapidly than that of smaller ratings. Figure 3 shows
typical effect of frequency on DF.
to about 2% when full rated voltage is applied, as bias. DF
is also reduced by the presence of DC bias. Rated voltage
may cause a decrease in DF of about 0.2% (e.g., a
decrease from 3.6 to 3.4% DF).
sionally, as tan d or “loss tangent.” The “Quality
Factor,” Q, is the reciprocal of DF (DF is not expressed in
76
Figure 2. Typical Effect of Temperature upon Capacitance
Figure 3.
+20
+10
20.0
10.0
-10
-20
Capacitance typically changes with temperature
DF is measured at 120 Hz and 25° C with up to 1 volt
Dissipation Factor (DF) is a useful low-frequency
Dissipation factor increases with increasing frequen-
DC bias causes a small reduction in capacitance, up
DF is defined as
1.0
0
100
-80 -60 -40 -20
Normal Effect of Frequency upon
®
Operating Temperature C
KEMET Electronics Corporation, P.O. Box 5928, Greenville, S.C. 29606 [phone]
Frequency - Hertz
Dissipation Factor
ESR
c
0 +20 +40 +60 +80 +100 +120
and is also referred to occa-
APPLICATION NOTES FOR TANTALUM CAPACITORS
1K
10K
Figure 5.
percent in this calculation). Another expression, rarely
used, is the “power factor,” or
while DF is ctn u.
7. DC LEAKAGE (DCL)
extent, and this effect can frequently be used to advantage
in circuits where only very low leakage currents can be tol-
erated. Typical response of DCL to applied voltage is illus-
trated in Figure 4.
temperature according to the typical curve of Figure 5.
through +85°C and may also be measured at +125°C with
2/3 of rated voltage applied.
8. RATED VOLTAGE
working voltage permissible at temperatures of +85° C or
below. The lower operating temperature is specified as
-55° C. Operation above +85° C is permissible, with
reduced working voltage. Typical working voltage reduc-
tion is to 2/3 of rated voltage at +125° C.
Figure 4.
0.0001
0.01
0.001
1.0
0.1
0.01
1.0
DC leakage is affected by voltage to a much larger
DC leakage current (DCL) increases with increasing
Leakage current is measured at a rated voltage
This term refers to the maximum continuous DC
0.1
0
0
10.0
1.0
0.1
10
10
-60 -40 -20
20
Reference 1.0
at + 25 C
20
Typical Range of DC Leakage as
Operating Temperature –˚C
a Function of Applied Voltage
Typical Effect of Temperature
upon DC Leakage Current
30
30
Percentage of Rated Voltage
Temperature - C
0
40
40
+20 +40 +60 +80 +100 +125
50
50
ESR
60
60
.
Power factor is cos u,
70
70
80
80
90
90
100
100 110
110