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參數(shù)資料
| 型號(hào)： | GR500 |
| 廠商： | KEMET Corporation |
| 英文描述： | HIGH RELIABILITY SOLID TANTALUM |
| 中文描述： | 高可靠性固體鉭 |
| 文件頁數(shù)： | 13/24頁 |
| 文件大?。?/td> | 686K |
| 代理商： | GR500 |
GR500/T240
KEMET Electronics Corporation P.O. Box 5928 Greenville, S.C. 29606 864/963-6300
13
KEMET
Introduction —
The following section is devoted to general
information of assistance in the application of
T240
Series
capacitors. Space does not permit a complete discussion of
all technical aspects, and further information on specific
problems may be obtained through KEMET sales represen-
tatives.
Capacitance —
The nominal values listed in Table I con-
forms to accepted industry practice; intermediate values may
be produced on special order. Standard tolerances are
± 20%, ± 10%, and ± 5%. Closer tolerances may be pro-
duced upon special order and after agreement upon mea-
surement conditions.
Typical variation of capacitance with respect to tempera-
ture is illustrated in Figure 1a. The capacitance of solid tan-
talum capacitors decreases with frequency, as shown in
Figure 1b.
Dissipation Factor —
Dissipation factor is defined as the
ratio of equivalent series resistance to capacitive reactance at
a specified frequency:
Where
R = equivalent series resistance in ohms
D = dissipation factor
X
C
= capacitive reactance in ohms
C = series capacitance in farads
f = frequency in Hertz
Unless otherwise stated, a standard frequency of 120 Hz is
used for both dissipation and capacitance measurements.
Typical behavior of dissipation factor with frequency is
shown in Figure 2. Dissipation factor loses its importance as
a measurement parameter at higher frequencies, where
impedance and ESR are the normal parameters of concern.
DC Leakage Current —
The DC Leakage current limits of
Table 1 for
T240
Series capacitors are the lowest generally
specified in the solid tantalum industry. Even lower leakage
currents are available on special order. Low leakage current,
aside from its intrinsic value, is an indication of anode qual-
ity. DC leakage current as a function of temperature is rep-
resented by the typical curve in Figure 3, while similar infor-
mation pertaining to leakage behavior with respect to volt-
age is contained in Figure 4.
APPLICATIONS INFORMATION GR500/T240
D = R
π
fCR
X
C
Fig. 2 Typical Behavior of dissipation factor as a function of
Frequency @ 25° C
Fig. 1a Typical capacitance with temperature
Fig. 1b Typical Variation of capacitance with frequency @ 25° C
Fig. 3 Typical effect of temperature upon leakage current
+20
+10
0
-10
-20
C
-80
-60 -40 -20
0
+20 +40 +60 +80 +100 +120
Operating Temperature
°
C
M
C
Frequency - Hertz
10K
1K
100
0.9
1.0
Reference
1.0 at 120Hz
1.0
10.0
20.0
M
100
1K
10K
Frequency - Hertz
M
10.0
1.0
0.1
Operating Temperature –C
-60 -40 -20
0
+20 +40 +60 +80 +100 +125
Reference 1.0
at + 25
°
C
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