SOLID TANTALUM CHIP CAPACITORS
TANTALUM MnO
2
COMPONENT PERFORMANCE CHARACTERISTICS
(con’t.)
TABLE 1 Maximum Capacitance Change
with Temperature (ref: 25°C)
–55°C
–10%
Ambient Temperature
+85°C
+125°C
+10%
*+12% or +15%to20%
Surge voltage tests are performed at +25°C,
+85°C and +125°C with the applicable surge volt-
age. The surge voltage is applied for 1000 cycles
of 30 seconds at voltage through a 33 ohm series
resistor and 30 seconds off voltage with the
capacitor discharged through a 33 ohm resistor.
Upon completing the test, the capacitors are
allowed to stabilize at room temperature. Capaci-
tance, DCL and DF are then tested:
a.
Capacitance — within ± 5% of initial value
b.
DC Leakage — within initial limit
c.
Dissipation Factor — within initial limit
d.
ESR — within initial limit
7. Reverse Voltage and Polarity
TABLE 3 Reverse Voltage Ratings
Temperature
+25°C
+85°C
+125°C
Permissible Reverse Voltage
15% of Rated Voltage
5% of Rated Voltage
1% of Rated Voltage
*+12% is standard. +15% and 20% apply to certain
extended CV values as noted in part number tables.
5. Working DC Voltage (WVDC)
•
3 to 50 volts
Refer to part number tables for available voltage
ratings by series.
These voltages are the maximum recommended peak
DC operating voltages from –55°C to +85°C for
continuous duty. These voltages are derated linearly above
+85°C to 2/3 rated voltage for operation at
+125°C (See Figure 3). For added reliability it is
recommended to operate at a 50% derating of the working
voltage for tantalum capacitors with MnO
2
as a cathode.
See page 39 for working DC Voltage of high temperature
T498 product.
100%
Percent Change in
Working DC Voltage
80%
60%
40%
20%
Solid tantalum capacitors are polarized devices
and may be permanently damaged or destroyed if
connected with the wrong polarity. The positive
terminal is identified on the capacitor body by a
stripe and a beveled edge. A small degree of tran-
sient reverse voltage is permissible for short peri-
ods per Table 3. The capacitors should not be
operated continuously in reverse mode, even with-
in these limits.
8. DC Leakage Current (DCL)
Refer to part number tables for maximum leakage
current limits.
DC leakage current is the current that, after a one-
to five-minute charging period, flows through a
capacitor when voltage is applied. Leakage is
measured at +25°C with full rated DC voltage
applied to the capacitor through a 1000 ohm resis-
tor in series with the capacitor.
DC leakage current increases with increasing tem-
perature.
TABLE 4 Leakage Limit Multipliers at Specified
Temperatures (ref: 25°C limits)
Ambient Temperature
–55°C
N/A
+85°C
10X
+125°C
12X
-60
-40
-20
0
+20 +40 +60 +80 +100 +120 +140
Operating Temperature— C
FIGURE 3
Working DC Voltage Change with Temperature
6. Surge Voltage
TABLE 2 Surge Voltage Ratings
at +25°C, +85°C & +125°C
Rated
Working
Volts
@ +25°C
& +85°C
3
4
6
10
16
20
25
35
50
6
Surge
Voltage
@ +25°C
& +85°C
4
5.2
8
13
20
26
33
46
65
Derated
DC
Volts
@ +125°C
2
2.7
4
7
10
13
17
23
33
Surge
Voltage
@ +125°C
2.4
3.2
5
8
12
16
20
28
40
©KEMET Electronics Corporation, P.O. Box 5928, Greenville, S.C. 29606, (864) 963-6300
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