Series CA2
Vishay
Wet Tantalum Capacitor, Button,
All-Tantalum Case, - 55 °C to + 125 °C Operation
FEATURES
•
•
•
•
•
•
All-Tantalum electrodes eliminate silver migration
Withstands high ripple current
Long life reliability
Reverse voltage capability
Instant use after long storage
Mounting: Through-hole
PERFORMANCE CHARACTERISTICS
Operating Temperature:
- 55 °C to + 125 °C
Voltage Range:
6 V
DC
to 125 V
DC
Capacitance Range:
47 µF to 1800 µF
SPECIFICATIONS
Environmental classification:
55/125/56
Vibration:
10 Hz to 2000 Hz, 0.75 mm or 98 m/s
2
, 15 h
Bump:
390 m/s
2
, 4000 bumps
Shock:
981 m/s
2
Acceleration:
981 m/s
2
Low air pressure:
1 kPa
APPROVALS
INTRODUCTION
This conveniently-packaged polar button unit employs a
non-solid electrolyte, and has a sintered tantalum anode.
The anode is produced from a high capacitance powder
resulting in a capacitor of small size and large CV product.
The cathode is also of tantalum and overcomes the
restrictions of a silver cathode system in allowing a high
ripple current rating and application of a 3 V reverse
potential. This all-tantalum construction results in a
non-catastrophic wear-out mechanism.
The seal is a high efficient system comprising a PTFE gasket
clamped between coined plates of tantalum by a
work-hardened nickel ring. This type of seal, common to all
button styles, is largely responsible for their long life and high
reliability and severe military environments.
The CA2 series ranges are available in several termination
options. These include a mounting stud and pins for circuit
mounting.
These capacitors are available released to:
• BS CECC 30 202 002
RIPPLE CURRENT CAPABILITY
The maximum allowable ripple current is 1 A
RMS
up to 85 °C
and 750 mA
RMS
to 125 °C. These values apply under normal
cooling conditions and are irrespective of frequency or
waveform. The algebraic sum of the AC peak and DC
voltages must not exceed the forward or reverse voltage
ratings at the relevant temperature.
At certain frequency/temperature/DC voltage combinations
higher levels of ripple current may be used. The
applications department should be contacted before the
above levels are exceeded.
REVERSE VOLTAGE CAPABILITY
The CA2 series employ tantalum cathodes which allow the
continuous application of reverse potentials not exceeding
3 V over the whole temperature range.
SURGE VOLTAGE
The surge voltage capability is 115 % of the voltage rating at
the relevant temperature.
APPLICATIONS
The CA2 series are designed for use in general military and
professional applications. For example: Power supply
“smoothing” filter networks, switching, by-pass, timer
functions and where reverse potentials occur.
TEMPERATURE RANGE
The capacitor is designed for operation between - 55 °C and
+ 125 °C, with linear voltage derating above + 85 °C to 66 %
of the rated voltage at + 125 °C.
WEIGHT
The CA2 style with a stud termination weighs approximately
18.1 g, including the nut. The CA2 styles, which has a printed
circuit board mounting, weighs approximately 17.3 g.
CAPACITANCE TOLERANCE
The standard capacitance tolerance is ± 20 % although
special tolerances are available by arrangement.
document number: 42078
Revision: 22-Mar-10
For technical questions, contact:
tantalum@vishay.com
www.vishay.com
1
Series CA2
Vishay
Wet Tantalum Capacitor, Button,
All-Tantalum Case, - 55 °C to + 125 °C Operation
RELIABILITY
All capacitors are subjected to burn-in. This is to remove
infant mortalities and ensure reliability. The capacitor lifetime
is enhanced when the unit is subjected to a reduced ripple
current, a low ambient temperature, and is externally cooled.
The use of a heat sink is recommended.
APPLICATION INFORMATION
Capacitors may be operated at less than the rated voltage,
resulting in significantly reduced leakage current values.
In timing circuits, or other applications where the device is
subjected only to a DC voltage, the ballistic or DC
capacitance will be somewhat larger than measured at 50 Hz.
The parametric information must necessarily be brief,
although additional comprehensive data is available on
request, and the tests tailored to customers’ requirements
can be made.
ORDERING PROCEDURE
Example: CA2C (220 µF, 50 V
DC
)
Vishay Part Number: CA2C227M050P
ORDERING INFORMATION
CA2
MODEL
C
CASE
CODE
See Ratings
and Case
Codes Table
227
CAPACITANCE
This is expressed in
picofarads. The first
two digits are the
significant figures. The
third is the number of
zeros to follow
M
TOLERANCE
M = 20 % (std)
K = 10 %
(special order)
100
VOLTAGE
This is expressed in volts.
To complete the three-digit
block, zeros precede the
voltage rating. A decimal
point is indicated by an “R”
(6R3 = 6.3 V)
A
TERMINATION AND
PACKAGING
A = Stud
B = PC mount pins
C = Twin tag or ribbon
D = Panel or
potting tag
Blank = Standard
(tin/lead coating)
E3 =
RoHS compliant
(100 % tin coating)
-
DIMENSIONS
in millimeters
The CA2 series is comprised of two case sizes, differing in depth of cup only. The case size dimensions are shown in the table. Four mounting
styles are available in both case sizes.
Stud
C
PC Pins
Potting Tag
Twin Tag or Ribbons
+
+
D
B
A
+
+
-
E
-
G
H
Mounting
holes M dia.
J
N
-
Hole Q dia.
S
-
P
R
W
F
4 BA shakeproof nut
20 S.W.G.
H.T.D.
Nickel
L
crs.
This mounting style is
suitable for panel thickness
of
up
to 1.2 mm
Hole T dia.
U
crs.
Mounting holes
V
dia.
K
crs.
A
3.6
B
max.
C
D
E
8.4
F
16.2
G
8.4
H
1.8
J
0.8
K
crs.
20.3
L
crs.
10.2
M
N
dia. nom.
1.1
2.4
P
13.1
Q
dia.
1.0
R
7.5
S
10.7
T
dia.
1.6
U
crs.
13.0
V
W
dia. nom.
3.5
0.30
8.5
(1)
21.8 8.4
(2)
Notes
•
All dimensions are in mm, and are maximum unless otherwise stated
(1)
For B case size, case height is 6.7 mm
(2)
Width of anode tag 4.22 mm max.
www.vishay.com
2
for technical questions, contact:
tantalum@vishay.com
document number: 42078
Revision: 22-Mar-10
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