KEMET Organic Capacitor (KO-CAP
®
) – High Reliability
T543 Up-Screen Commercial
Polymer Electrolytic, 2.5 – 63 VDC
Overview
The KEMET Organic Capacitor (KO-CAP) is a solid
electrolytic capacitor with a conductive polymer cathode
capable of delivering very low ESR and improved
capacitance retention at high frequencies. KO-CAP
combines the low ESR of multilayer ceramic, the high
capacitance of aluminum electrolytic, and the volumetric
efficiency of tantalum into a single surface mount package.
Unlike liquid electrolyte-based capacitors, KO-CAP
has a very long operational life and high ripple current
capabilities.
The T543 COTS Polymer Electrolytic capacitor is an
upscreened version of the industrial T520 KO-CAP. The
T543's upscreened option includes surge current testing of
10 cycles at +25°C and 10 cycles at -55°C/+85°C. In addition
to 100% Tin (Sn) terminations, a tin-lead (SnPb) option is
also available. The recommended application derating for
these capacitors is 10 – 20%, rendering them suitable for
application voltages from 2.25 to 50 VDC.
Benefits
• Extremely low ESR
• High frequency capacitance retention
• 100% accelerated steady state aging
• 100% surge current tested
• Tape & Reel standard packaging per EIA 481
• Volumetrically efficienct
• Surge options at 25°C and −55°C/+85°C
• EIA standard case sizes
• Halogen-free epoxy and RoHS compliant
Applications
Typical applications include DC/DC converters, switch mode and point of load power supply, radar pulse capacitor, and
telecommunications (mobile phone and base station). Other general applications include decoupling and filtering in
applications requiring low ESR or a benign failure mode.
When extreme temperatures and humidity are taken into account, polymer tantalum capacitors offer a number of
advantages over other types of capacitors, when used in extreme environments. KEMET continues to investigate the
behavior of polymer tantalum capacitors in extreme conditions. If you have questions about using these capacitors in
a specific environment or application, we suggest you contact your local representative or field application engineer to
discuss the specific details of your application (see “Considerations for Polymer Capacitors in Extreme Environments”
located at www.kemet.com/ExtremePolymerPaper).
Built Into Tomorrow
© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
T2061_T543 • 3/3/2022
1
KEMET Organic Capacitor (KO-CAP
®
) – High Reliability
T543 Up-Screen Commercial Polymer Electrolytic, 2.5 – 63 VDC
Environmental Compliance
RoHS compliant when ordered with 100% Sn solder.
• Halogen-free
• Epoxy compliant with UL94 V–0
• Molded Epoxy complies for outgassing testing under ASTM E 595.
K-SIM
For a detailed analysis of specific part numbers, please visit ksim.kemet.com to access KEMET’s K-SIM software. KEMET
K-SIM is designed to simulate behavior of components with respect to frequency, ambient temperature, and DC bias levels.
Ordering Information
T
Capacitor
Class
543
Series
D
Case
Size
156
K
035
A
H
Termination
Finish
H = Standard
solder coated
(SnPb 5% Pb
minimum)
T = 100% tin
(Sn)
E
Surge
100
ESR
Packaging
(C-Spec)
Blank = 7" reel
7280 = 13" reel
7610 = Bulk Bag
7640 = Bulk
plastic box
WAFL = Waffle
pack
Capacitance Code Capacitance Rated Voltage Failure Rate/
(pF)
Tolerance
(VDC)
Design
2R5 = 2.5
003 = 3
004 = 4
006 = 6.3
010 = 10
12R = 12.5
016 = 16
020 = 20
025 = 25
035 = 35
040 = 40
050 = 50
063 =63
A = N/A
First two digits
K = ±10%
T=
Polymer A,B,
Tantalum Tantalum C, D,
represent significant
M = ±20%
COTS
H, L,
figures. Third digit
M, O,
specifies number of
T, U,
zeros.
V, W,
X, Y
E = None
ESR in
S = 10 cycles
mΩ
25°C
W = 10 cycles
−55°C and
85°C
Performance Characteristics
Item
Operating Temperature
Rated Capacitance Range
Capacitance Tolerance
Rated Voltage Range
DF (120 Hz)
ESR (100 kHz)
Leakage Current
Performance Characteristics
−55°C to 105°C/125°C (refer to part number for maximum temperature rating)
4.7 – 2,000 μF at 120 Hz/25°C
K tolerance (10%), M tolerance (20%)
2.5 – 63 V
Refer to Part Number Electrical Specification Table
Refer to Part Number Electrical Specification Table
≤ 0.1 CV (µA) at rated voltage after 5 minutes
© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
T2061_T543 • 3/3/2022
2
KEMET Organic Capacitor (KO-CAP
®
) – High Reliability
T543 Up-Screen Commercial Polymer Electrolytic, 2.5 – 63 VDC
Qualification
Test
Endurance
Condition
Δ C/C
105°C at rated voltage, 2,000 hours
125°C at 2/3 rated voltage, 2,000 hours**
DF
DCL
ESR
Δ C/C
105°C at 0 volts, 2,000 hours
125°C at 0 volts, 2,000 hours**
DF
DCL
ESR
Δ C/C
Humidity
60°C, 90% RH, 500 hours
DF
DCL
ESR
Extreme temperature exposure at
a succession of continuous steps
at +25°C, −55°C, +25°C, +85°C,
+105°C/+125°C**, +25° C
+25°C
Δ C/C
DF
DCL
IL*
IL
IL
Δ C/C
DF
DCL
ESR
Δ C/C
DF
DCL
Characteristics
Within −20/+10 of initial value
Within initial limits
Within 1.25 x initial limit
Within 2.0 x initial limit
Within −20/+10 of initial value
Within initial limits
Within 1.25 x initial limit
Within 2.0 x initial limit
Within −5%/+35% of initial value
Within initial limits
Within 5.0 x initial limit
Within 2.0 x initial limit
−55°C
±20%
IL
N/A
+85°C
±20%
1.2 x IL
10 x IL
+105°C
±30%
1.5 x IL
10 x IL
Storage Life
Temperature Stability
Within −20/+10 of initial value
Within initial limits
Within initial limits
Within initial limits
Within ±10 of initial value
Within initial limits
Within initial limits
Surge Voltage
105°C, 1.32 x rated voltage, 1,000 cycles
Mechanical Shock/
Vibration
MIL–STD–202, Method 213, Condition I, 100 G peak
MIL–STD–202, Method 204, Condition D, 10 Hz to
2,000 Hz, 20 G peak
*IL = Initial limit
**Refer to part number specifications for individual temperature classification
© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
T2061_T543 • 3/3/2022
3
KEMET Organic Capacitor (KO-CAP
®
) – High Reliability
T543 Up-Screen Commercial Polymer Electrolytic, 2.5 – 63 VDC
Reliability
KO-CAP capacitors have an average failure rate of 0.5 %/1,000 hours at category voltage, U
C
, and category temperature,
T
C
. These capacitors are qualified using industry test standards at U
C
and T
C
. The minimum test time (1,000 hours or 2,000
hours) is dependent on the product.
The actual life expectancy of KO-CAP capacitors increases when application voltage, U
A
, and application temperature, T
A
,
are lower than U
C
and T
C
. As a general guideline, when U
A
< 0.9 * U
C
and T
A
< 85°C, the life expectancy will typically exceed
the useful lifetime of most hardware (> 10 years).
The lifetime of a KO-CAP capacitor at a specific application voltage and temperature can be modeled using the equations
below. A failure is defined as passing enough current to blow a 1-amp fuse. The calculation is an estimation based on
empirical results and is not a guarantee.
VAF =
where:
( )
U
A
U
C
n
[ (
TAF = e
E
a
k
1
273+T
A
1
273+T
C
)]
VAF = acceleration factor due to voltage, unitless
U
C
= category voltage, volt
U
A
= application voltage, volt
n = exponent, 16
where:
TAF = acceleration factor due to temperature, unitless
E
a
= activation energy, 1.4 eV
k = Boltzmann’s constant, 8.617E-5 eV/K
T
A
= application temperature, °C
T
C
= category temperature, °C
AF = VAF * TAF
where:
AF = acceleration factor, unitless
TAF = accerlation factor due to temperature, unitless
VAF = acceleration factor due to voltage, unitless
where:
Life
U ,T
= Life
U ,T
* AF
A
A
C
C
Life
UA, TA
= estimated life application voltage
and temperature, years
Life
UC, TC
= guaranteed life category voltage
and temperature, years
AF = acceleration factor, unitless
Terms:
Category voltage, U
C
: maximum recommended peak DC operating voltage for continuous operation at the category temperature, T
C
Rated voltage, U
R
: maximum recommended peak DC operating voltage for continuous operation up to the rated temperature, T
R
Category temperature, T
C
: maximum recommended operating temperature. Voltage derating may be required at T
C
Rated temperature, T
R
: maximum recommended operating temperature without voltage derating. T
R
is equal to or lower than T
C
Reliability Table 1 – Common temperature range classifications
85°C (T
R
) /
85°C (T
C
)
105°C (T
R
) /
105°C (T
C
)
105°C (T
R
) /
125°C (T
C
)
Rated Voltage (U
R
)
Category Voltage (U
C
)
Rated Voltage (U
R
)
Category Voltage (U
C
)
Rated Voltage (U
R
)
Category Voltage (U
C
)
2.5
2.5
2.5
2.5
2.5
1.7
4.0
4.0
4.0
4.0
4.0
2.7
6.3
6.3
6.3
6.3
6.3
4.2
8.0
8.0
8.0
8.0
8.0
5.4
10.0
10.0
10.0
10.0
10.0
6.7
12.5
12.5
12.5
12.5
12.5
8.4
16.0
16.0
16.0
16.0
16.0
10.7
20.0
20.0
20.0
20.0
20.0
13.4
25.0
25.0
25.0
25.0
25.0
16.8
35.0
35.0
35.0
35.0
35.0
23.5
50.0
50.0
50.0
50.0
50.0
33.5
63.0
63.0
63.0
63.0
63.0
42.2
75.0
75.0
75.0
75.0
75.0
50.3
© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
T2061_T543 • 3/3/2022
4
KEMET Organic Capacitor (KO-CAP
®
) – High Reliability
T543 Up-Screen Commercial Polymer Electrolytic, 2.5 – 63 VDC
Electrical Characteristics
ESR vs. Frequency
100
T5430B157M006ATE035_Imp
T543C227M006ATE025_Imp
T543V337M006ATE015_Imp
T543D337M006ATE009_Imp
T543B157M006ATE035_ESR
T543C227M006ATE025_ESR
T543V337M006ATE015_ESR
T543D337M006ATE009_ESR
Impedance, ESR (Ohms)
10
1
0.1
0.01
0.001
100
1,000
10,000
100,000
1,000,000
10,000,000
Frequency (Hz)
Capacitance vs. Frequency
1,000
Capacitance (µF)
100
10
T543B157M006ATE035
T543C227M006ATE025
T543V337M006ATE015
T543D337M006ATE009
1
100
1,000
10,000
100,000
1,000,000
10,000,000
Frequency (Hz)
© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
T2061_T543 • 3/3/2022
5
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