135D686X0100T6E3 Vishay, 135D686X0100T6E3 Datasheet - Page 10

• Manufacturer Part Number: 135D686X0100T6E3
• Description: CAPACITOR TANT 68UF, 100V, 2.2OHM, AXIAL
• Manufacturer: Vishay

Specifications of 135D686X0100T6E3

• Capacitance: 68uF
• Tolerance (+ Or -): 20%
• Voltage: 100VDC
• Mounting Style: Through Hole
• Operating Temp Range: -55C to 200C
• Esr: 2.2Ohm
• Construction: Axial
• Dcl: 10uA
• Seal: Hermetic
• Insulation: Sleeved - High Temp
• Polarity: Polar
• Failure Rate: Not Required
• Product Length (mm): 21.03mm
• Product Depth (mm): Not Requiredmm
• Product Height (mm): Not Requiredmm
• Product Diameter (mm): 10.32mm
• Capacitance Tolerance: ± 20%
• Voltage Rating: 100VDC
• Capacitor Mounting: Through Hole
• Termination Type: Axial Leaded
• Leaded Process Compatible: Yes
• Capacitor Terminals: Axial Leaded
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Compliant

135D
Vishay
GUIDE TO APPLICATION
1.
2.
www.vishay.com
10
AC Ripple Current: Subjecting a capacitor to an AC
voltage causes an AC current to flow through it. The
amplitude of the current is dependent on the
impedance of the capacitor at the frequency of the
applied signal:
where:
This current causes heating in the capacitor because of
I
applied frequency). This heating or power dissipation,
is one of the limiting factors of the capacitor’s ripple
current rating.
These power dissipation ratings are based on a
calculated + 50 °C internal temperature rise in still air.
The maximum alowable ripple currents given in the
“Standard and Extended Ratings Tables” are based on
these ratings and the maximum equivalent series
resistance at that frequency.
The relationship is written as follows:
Therefore:
AC Ripple Voltage: In operation, the peak voltage
across the capacitor (DC working voltage plus peak
ripple voltage) must not exceed the rated working
voltage of the capacitor. The DC component of the
applied voltage should be sufficiently large to prevent
polarity reversal in excess of 3 V at + 85 °C or 2 V at
125 °C.
where:
where:
2
I = Ripple current
V = Applied AC voltage
Z = Impedance of capacitor (frequency dependent)
P = Maximum power
I = Maximum ripple current
R = Equivalent series resistance
R is in Ω
P is in W
I is in A
R losses (R is the equivalent series resistance at the
CASE CODE
C
K
F
T
RMS
Wet Tantalum Capacitors Tantalum-Case with Glass-to-Tantalum
P
I
I
=
=
=
AT + 25 °C (W) IN FREE AIR
MAXIMUM PERMISSIBLE
I
V
Z
2
R
POWER DISSIPATION
P
R
Hermetic Seal for - 55 °C to + 200 °C Operation
For technical questions, contact:
1.00
1.55
1.75
1.95
[e-mail]
There will be a point at the lower frequency and
capacitance values when the peak AC voltage will be
the limiting factor on the ripple current - not its heating
effects.
For example:
where:
Therefore:
and
Therefore, the peak voltage of the capacitor is the
limiting factor for the ripple current and can be
calculated as follows:
or
Max I
Given a 25 µF, 8 V capacitor in the “C” case code and
assuming a ripple current application at a frequency
of 120 Hz, the total maximum allowable peak to peak
voltage at + 25 °C is:
8 V
In order to allow the full swing of 11 V
exceed rated forward or rated reverse, a DC bias of
2.5 V is assumed to be applied.
From the ”Standard Ratings Table”, the maximum
ripple current at 40 kHz is 0.820 A. Compensating for
the lower frequency from the “Ripple Current
Multipliers” tables:
I
This current rating is calculated strictly on the basis of
maximum power dissipation. Now calculate what
impressed voltage this amount of current will cause
across this capacitor.
Assuming a sinusoidal voltage, calculate the rated
peak to peak current:
ESR = 4 Ω (from “Standard Ratings” table)
RMS
X
I
pp
C
F
+ 3 V
(120 Hz) = 0.820 A x 0.6 = 0.492 A
=
=
pp
Z
V
C 120Hz
I
2πfC
V
pp impressed
RMS
=
0.206
-------------- -
(
Z
2 2
pp impressed
1
(
C
V
---------------------------------------- -
R
(
Cpp
=
×
= 11 V
=
)
=
2 2
=
=
(
2 π ( ) 120
4 ( )
74.1 V
allowed
Z
0.073 A
(
C
2
=
)
pp
(
)
(
+
=
=
ESR
0.492
(
pp
1.39 A
I
53.1
pp
RMS
) 25
)
1
>
(
)
×
=
2
11 V
×
)
Z
+
2
------------------
53.3 Ω
11.0 V
2.828
at 120 Hz
C
×
pp
Document Number: 40024
=
(X
10
(
pp
×
120 Hz
53.3 Ω
C (120 Hz)
–
53.3 Ω
6
=
)
Revision: 15-Nov-10
=
=
1.39 A
0.206 A
)
53.1 Ω
)
2
RMS
pp
pp
pp
and not