Datasheet

196 DLC
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Vishay BCcomponents
Revision: 13-Mar-18
4
Document Number: 28362
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MEASURING OF CHARACTERISTICS
CAPACITANCE (C)
Capacitance shall be measured by constant current
discharge method.
Fig. 3 - Voltage diagram for capacitance measurement
Capacitance value C
R
is given by discharge current I
D
, time
T and rated voltage U
R
, according to the following equation:
Fig. 4 - Test circuit for capacitance measurement
INTERNAL RESISTANCE (R
I
) AT 1 kHz
Fig. 5 - Test circuit for R
I
measurement
LEAKAGE CURRENT (I
L
)
Leakage current shall be measured after 30 min application
of rated voltage U
R
:
Fig. 6 - Test circuit for leakage current
Fig. 7 - Typical leakage current as a function of time
DISCHARGE CURRENT AS A FUNCTION OF
RATED CAPACITANCE
PARAMETER VALUE UNIT
Rated 
capacitance, C
R
0.047 0.1 0.22 0.33 0.47 0.68 1.0 F
Discharge

current, I
D
0.1 1.0 mA
30 min T (s)
Time
0
2.0
U
R
U
(V)
CF
I
D
mA x 10
-3
x T s
U
R
V - 2
---------------------------------------------------------
=
A
V
C
Constant
current
discharger
+
R
I

V
C
V
10
-3
----------------
=
V
A
1 mA
C
1 kHz
+
I
L
A
VV
10
-4
------------
=
V
R
S
100 Ω
C
++
1
10
2
10
Time (h)
2
4
5
1
1 10 20 30 40 50
I
L
(µA)
Curve 1: 1.0 F, 5.5 V
Curve 2: 0.47 F, 5.5 V
Curve 3: 0.22 F, 5.5 V
Curve 4: 0.1 F, 5.5 V
Curve 5: 0.047 F, 5.5 V
R
S
= 100 Ω
3