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52
CTS1, CTS13, CTS32, 749DX
Vishay Sprague
Document Number 42073
Revision 28-Mar-02
For technical questions, contact europetantalum@vishay.com
10.Humidity test:
After 56 days (1350 hours) at + 40
°
C, 90
to 95% of relative humidity (per IEC 68-2-3) with no
voltage applied, capacitors shall meet the requirements
in table 7 below.
Table 7
CAPACITANCE CHANGE
Within
±
3% of initial value
DC LEAKAGE CURRENT
Within initial requirement
@ +25
°
C - Table 2
DISSIPATION FACTOR
Within initial requirement
@ +25
°
C - Table 3
11.Charge-discharge test (CTS32)
: Capacitors shall
withstand 1,000,000 cycles at + 85
°
C of 0.5 second
charge at DC rated voltage, 0.5 second discharge in an
equivalent load resistance of the test fixture lower than
0.5 ohm. Following test, capacitors shall meet the
requirements in table 8 below.
Table 8
CAPACITANCE CHANGE
Within
±
5% of initial value
@ + 25
°
C
DC LEAKAGE CURRENT
Within initial requirement
@ +25
°
C - Table 2
DISSIPATION FACTOR
Within initial requirement
@ +25
°
C - Table 3
Typical values of charge-discharge current (per above test
conditions)
R
ATED VOLTAGE
U
R
(V)
6.3
10
16
25
40
50
63
12.Insulation test
: For capacitors with insulating sleeves,
a DC voltage of 100 volts shall be applied for one minute
between the case of the capacitor and a metal “V” block
in intimate contact with the insulating sleeve.
The insulating resistance measured in these conditions
shall be at least 100 megohms.
CHARGE-DISCHARGE CURRENT
(A)
13
20
32
50
80
100
126
13.Lead pull test
: Leads shall withstand the following test
(IEC 68 - 2 - 2):
Tensile stress of 5N (cases A and B) or 10N (cases C
and D) for 10 seconds in any direction
One bend in each direction
Two consecutive rotations of 180
°
PERFORMANCE CHARACTERISTICS (CONT’D)
1. AC Ripple Current
: The maximum allowable ripple
current shall be determined from the formula:
I
rms
=
P
R
ESR
where
P = Power Dissipation in Watts at + 25
°
C as given below
R
ESR
= The capacitor Equivalent Series Resistance at the
specified frequency.
2. AC Ripple Current:
The maximum allowable ripple
voltage shall be determined from the formula:
V
rms
=
P
R
ESR
x Z, where
Z = The capacitor Impedance at the specified frequency.
The calculations are summarized on the graphs page 7
giving the maximum available ripple voltage as a function
of frequency.
However, the sum of the peak AC voltage plus the DC
voltage shall not exceed the rated DC voltage at + 85
°
C
of the capacitor. The sum of the negative peak AC voltage
plus the DC voltage shall not allow a voltage reversal
exceeding 15% of the rated DC voltage.
3. AC Ripple Current or Voltage Derating Factor:
If these
capacitors are to be operated at temperatures above
+ 25
°
C, the permissible rms ripple current or voltage shall
be calculated using the derating factors in the table below:
TEMPERATURE
DERATING FACTOR
+ 25
°
C
1.0
+ 55
°
C
0.8
+ 85
°
C
0.6
+ 125
°
C
0.4
4. Power Dissipation:
Power dissipation will be affected
by the heat sinking capability of the mounting surface.
Non-sinusoidial ripple current may produce heating effects
which differ from those shown in the following table. It is
important that the equivalent I
rms
value be established
when calculating permissible operating levels.
GUIDE TO APPLICATION
CASE
CODE
POWER DISSIPATION
@ + 25
°
C (WATTS)
A
0.115
B
0.145
C
0.185
D
0.225
Hermetically Sealed, Axial-Lead,
To CECC Specifications