T98
www.vishay.com
Vishay Sprague
Solid Tantalum Chip Capacitors T
ANTAMOUNT
™,
Hi-Rel COTS, Ultra-Low ESR, Built-in-Fuse, Conformal Coated Case
FEATURES
• High
reliability design
screening available
with
reliability
Available
• Surge current testing per MIL-PRF-55365
options available
• Ultra-low ESR
• Mounting: surface mount
• Terminations: SnPb, standard. 100 % tin available
Available
• Circuit protection for mission or safety critical systems
PERFORMANCE CHARACTERISTICS
www.vishay.com/doc?40209
Operating Temperature:
-55 °C to +125 °C
(above 85 °C, voltage derating is required)
Capacitance Range:
10 μF to 1500 μF
Capacitance Tolerance:
± 10 %, ± 20 % standard
Voltage Rating:
4 V
DC
to 75 V
DC
• Typical fuse activation curve is provided in the FAQ
(www.vishay.com/doc?40110)
• Moisture sensitivity level 2a
• Material categorization: for definitions of compliance
please see
www.vishay.com/doc?99912
Note
*
This datasheet provides information about parts that are
RoHS-compliant and / or parts that are non RoHS-compliant. For
example, parts with lead (Pb) terminations are not RoHS-compliant.
Please see the information / tables in this datasheet for details
ORDERING INFORMATION
T98
TYPE
R
CASE
CODE
227
CAPACITANCE
K
CAPACITANCE
TOLERANCE
020
DC VOLTAGE
RATING AT +85 °C
E
TERMINATION /
PACKAGING
(available options are
series dependent)
E = Sn / Pb solder /
7" (178 mm) reel
L = Sn / Pb solder /
7" (178 mm), 1/2 reel
C = 100 % tin /
7" (178 mm), reel
H = 100 % tin /
7" (178 mm), 1/2 reel
S
RELIABILITY
LEVEL
A
SURGE
CURRENT
See
Ratings
and
Case
Codes
table
This is expressed in
picofarads. The first
two digits are the
significant figures.
The third is the
number of zeros
to follow.
K = ± 10 %
M = ± 20 %
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)
S = 40 h
burn-in
Z = non-
established
reliability
A = 10 cycles
at +25 °C
B = 10 cycles
at -55 °C /
+85 °C
S = 3 cycles
at 25 °C
Note
• We reserve the right to supply higher voltage ratings and tighter capacitance tolerance capacitors in the same case size.
Low ESR solid tantalum chip capacitors allow delta ESR of 1.25 times the datasheet limits after mounting
Revision: 21-Oct-2021
Document Number: 40119
1
For technical questions, contact:
tantalum@vishay.com
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT
www.vishay.com/doc?91000
Conformal Coated Guide
www.vishay.com
Vishay Sprague
Guide for Conformal Coated Tantalum Capacitors
INTRODUCTION
Tantalum electrolytic capacitors are the preferred choice in
applications where volumetric efficiency, stable electrical
parameters, high reliability, and long service life are primary
considerations. The stability and resistance to elevated
temperatures of the tantalum / tantalum oxide / manganese
dioxide system make solid tantalum capacitors an
appropriate choice for today's surface mount assembly
technology.
Vishay Sprague has been a pioneer and leader in this field,
producing a large variety of tantalum capacitor types for
consumer, industrial, automotive, military, and aerospace
electronic applications.
Tantalum is not found in its pure state. Rather, it is
commonly found in a number of oxide minerals, often in
combination with Columbium ore. This combination is
known as “tantalite” when its contents are more than
one-half tantalum. Important sources of tantalite include
Australia, Brazil, Canada, China, and several African
countries. Synthetic tantalite concentrates produced from
tin slags in Thailand, Malaysia, and Brazil are also a
significant raw material for tantalum production.
Electronic applications, and particularly capacitors,
consume the largest share of world tantalum production.
Other important applications for tantalum include cutting
tools (tantalum carbide), high temperature super alloys,
chemical processing equipment, medical implants, and
military ordnance.
Vishay Sprague is a major user of tantalum materials in the
form of powder and wire for capacitor elements and rod and
sheet for high temperature vacuum processing.
Rating for rating, tantalum capacitors tend to have as much
as three times better capacitance / volume efficiency than
aluminum electrolytic capacitors. An approximation of the
capacitance / volume efficiency of other types of capacitors
may be inferred from the following table, which shows the
dielectric constant ranges of the various materials used in
each type. Note that tantalum pentoxide has a dielectric
constant of 26, some three times greater than that of
aluminum oxide. This, in addition to the fact that extremely
thin films can be deposited during the electrolytic process
mentioned earlier, makes the tantalum capacitor extremely
efficient with respect to the number of microfarads available
per unit volume. The capacitance of any capacitor is
determined by the surface area of the two conducting
plates, the distance between the plates, and the dielectric
constant of the insulating material between the plates.
COMPARISON OF CAPACITOR
DIELECTRIC CONSTANTS
DIELECTRIC
Air or vacuum
Paper
Plastic
Mineral oil
Silicone oil
Quartz
Glass
Porcelain
e
DIELECTRIC CONSTANT
1.0
2.0 to 6.0
2.1 to 6.0
2.2 to 2.3
2.7 to 2.8
3.8 to 4.4
4.8 to 8.0
5.1 to 5.9
5.4 to 8.7
8.4
26
12 to 400K
THE BASICS OF TANTALUM CAPACITORS
Most metals form crystalline oxides which are
non-protecting, such as rust on iron or black oxide on
copper. A few metals form dense, stable, tightly adhering,
electrically insulating oxides. These are the so-called “valve”
metals and include titanium, zirconium, niobium, tantalum,
hafnium, and aluminum. Only a few of these permit the
accurate control of oxide thickness by electrochemical
means. Of these, the most valuable for the electronics
industry are aluminum and tantalum.
Capacitors are basic to all kinds of electrical equipment,
from radios and television sets to missile controls and
automobile ignitions. Their function is to store an electrical
charge for later use.
Capacitors consist of two conducting surfaces, usually
metal plates, whose function is to conduct electricity. They
are separated by an insulating material or dielectric. The
dielectric used in all tantalum electrolytic capacitors is
tantalum pentoxide.
Tantalum pentoxide compound possesses high-dielectric
strength and a high-dielectric constant. As capacitors are
being manufactured, a film of tantalum pentoxide is applied
to their electrodes by means of an electrolytic process. The
film is applied in various thicknesses and at various voltages
and although transparent to begin with, it takes on different
colors as light refracts through it. This coloring occurs on the
tantalum electrodes of all types of tantalum capacitors.
Revision: 17-Jun-2021
Mica
Aluminum oxide
Tantalum pentoxide
Ceramic
In the tantalum electrolytic capacitor, the distance between
the plates is very small since it is only the thickness of the
tantalum pentoxide film. As the dielectric constant of the
tantalum pentoxide is high, the capacitance of a tantalum
capacitor is high if the area of the plates is large:
eA
-
C
=
------
t
where
C = capacitance
e = dielectric constant
A = surface area of the dielectric
t = thickness of the dielectric
Tantalum capacitors contain either liquid or solid
electrolytes. In solid electrolyte capacitors, a dry material
(manganese dioxide) forms the cathode plate. A tantalum
lead is embedded in or welded to the pellet, which is in turn
connected to a termination or lead wire. The drawings show
the construction details of the surface mount types of
tantalum capacitors shown in this catalog.
Document Number: 40150
1
For technical questions, contact:
tantalum@vishay.com
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT
www.vishay.com/doc?91000
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