T213A105J050ASC Kemet Corporation, T213A105J050ASC Datasheet - Page 78

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

KEMET
monolithic ceramic capacitors) it is insignificant at the
basic measurement frequencies of 120 and 1000 Hz.
in series with the capacitance. Lead wires and capacitor
electrodes are contributing sources.
reach 50,000 megohms in a tantalum capacitor. It can
exceed 1012 ohms in monolithic ceramics and in film
capacitors.
absorption and molecular polarization. It becomes very
significant in high frequency measurements and applica-
tions. Its value varies with frequency.
tantalum capacitor which typically equates to 1-2% of the
applied voltage.
according to its equation above. There is unavoidable
inductance as well as resistance in all capacitors, and at
some point in frequency, the reactance ceases to be
capacitive and becomes inductive. This frequency is called
the self-resonant point. In solid tantalum capacitors, the
resonance is damped by the ESR, and a smooth, rather
than abrupt, transition from capacitive to inductive reac-
tance (XL = 2pfL) follows.
78
Figure 9.
Figure 10.
100
0.1
10
0.3
0.1
100
30
10
100
1
RS — Represents the actual ohmic series resistance
RL — Capacitor Leakage Resistance. Typically it can
Rd — The dielectric loss contributed by dielectric
Cd — The inherent dielectric absorption of the solid
As frequency increases, X
3
1
1000
1000
ESR and Impedance vs. Frequency
ESR and Impedance vs. Frequency
®
Frequency (MHz)
KEMET Electronics Corporation, P.O. Box 5928, Greenville, S.C. 29606 [phone]
10K
20VDC Rated
10VDC Rated
10K
Frequency (MHz)
APPLICATION NOTES FOR TANTALUM CAPACITORS
100K
100K
c
continues to decrease
1M
1M
Impedance
ESR
(Ohms)
Impedance
ESR
(Ohms)
10M
10M
sentative capacitor ratings in Figures 9 through 11.
Measured impedance will be affected by the length of lead
wire included. Data for the curves were taken by including
1/2" of each lead wire in the measuring circuit.
tive above the self-resonance, these capacitors find use
as decoupling devices above 10 MHz. Special designs
have been developed for minimum inductance and are
used above 100 MHz.
kHz, ESR decreases with increasing temperature. The
amount of change is influenced by the size of the capaci-
tor and is generally more pronounced on smaller ratings.
13. POWER DISSIPATION
established for all Series and is listed in each respective
product section.
radial molded, and 61-70 for tantalum dipped.
sible power into an AC voltage rating. Assuming a sinu-
soidal waveform, the “ripple voltage” permissible may be
calculated from the impedance and ESR data shown in the
respective product section. However, three criteria must
be observed:
100
Figure 11b Typical Effect of Temperature
0.1
0.1
Figure 11a.
10
100
1
Typical ESR and Z performance is given for repre-
Despite the fact that the reactance is entirely induc-
ESR and Z are also affected by temperature. At 100
Permissible power dissipation has been empirically
See pages 6-41 for herm seal, 42-50 for axial and
It is usually most convenient to translate the permis-
0.1
10
1
Multiplier of 100kHz ESR
-50
Temperature - Degrees Centigrade
1000
ESR and Impedance vs. Frequency
-25
on 100 kHz ESR
Frequency (MHz)
Frequency (MHz)
10K
35VDC Rated
0
25
100K
50
75
1M
Impedance
ESR
(Ohms)
100
10M
125