Tantalum Polymer Capacitors – Hermetically Sealed
T551 Axial & T556 Surface Mount 125°C
Overview
The T551 axial leaded and T556 surface mount polymer
hermetically sealed (PHS) devices are tantalum capacitors
with a Ta anode and Ta2O5 dielectric. A conductive,
organic polymer replaces the traditionally used MnO2 or
wet electrolyte as the cathode plate of the capacitor. The
result is very low ESR and improved capacitance retention
at high frequency and low temperature. The PHS device
also exhibits a benign failure mode, which eliminates the
case breach that can occur in wet tantalum capacitors.
Additionally, the part may be operated at voltages up to
80% of rated voltage, with equivalent or better reliability
than traditional MnO2 or wet tantalum capacitors operated
at 50% of rated voltage.
PHS capacitors molded also offer higher ripple current
handling capability and a lower ESR range than wet
tantalums. With reduced ESR and enhanced capacitance
retention at higher frequencies and low temperatures, these
parts provide the highest total capacitance and the most
economical solution for high power applications, all within an
approximately 25% lighter package than the equivalent wet
tantalum capacitor.
Benefits
• Includes F-Tech anode, which eliminates hidden defects in
the dielectric
• 100% simulated breakdown screening
• Maximum operating temperature of +125°C
• Polymer cathode technology
• ≤ 0.0075 CV (µA) at rated voltage after 5 minutes
• Extremely low ESR
• High frequency and low temperature capacitance retention
• 100% constant voltage conditioning (240 hours)
• 100% surge current tested
• Volumetrically efficient
• Use at up to 80% of rated voltage
• Non-ignition failure mode
• Approximately 25% lighter than equivalent wet tantalum
• T551 case dimensions equivalent to
MIL-PRF-39006/22/25/30/31
• T556 surface mount design (see dimensions diagram)
Built Into Tomorrow
© KEMET Electronics Corporation • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
T2072_T551 • 8/18/2023
1
Tantalum Polymer Capacitors – Hermetically Sealed
T551 Axial & T556 Surface Mount 125°C
Applications
Typical applications include high voltage power management, such as buck/boost converters, filtering, hold-up capacitors,
and other high ripple current applications.
Ordering Information
T
551
Capacitor
Class
Series
T=
Tantalum
B
107
M
025
Case Capacitance Capacitance Rated Voltage
Size Code (pF)
Tolerance
(VDC)
551 =
Axial
Leaded
PHS
556 =
Surface
Mount
PHS
B
First two
digits
represent
significant
figures.
Third digit
specifies
number of
zeros.
K = ±10%
M = ±20%
006 = 6.3
008 = 8
010 = 10
015 = 15
025 = 25
030 = 30
040 = 40
050 = 50
060 = 60
075 = 75
A
T
4251
Product
Level
Termination
Finish
Surge Option*
A = N/A
T = 100% tin
(Sn)-plated
H = Tin/
lead (SnPb)
solder
coated (5%
Pb minimum)
Blank = 25°C ±5°C, 10
cycles, after constant
voltage conditioning
(KEMET standard)
4251 = Surge current, 10
cycles, –55°C and +85°C
4252 = 10 cycles,
–55°C and +85°C
before constant voltage
conditioning
Packaging*
Blank = Bulk/
Sleeved
0100 = Bulk/
Unsleeved
7200 = Tape &
Reel/Sleeved
7293 = Ammo/
Sleeved
7443 = Ammo/
Sleeved
* Only for T551 (Surge options/packaging)
Performance Characteristics
Item
Performance Characteristics
Operating Temperature
Rated Capacitance Range
Capacitance Tolerance
Rated Voltage Range
DF (120 Hz at 25°C)
ESR (100 kHz at 25°C)
Leakage Current
Packaging
−55°C to 125°C
20 – 680 μF at 120 Hz/25°C *
K tolerance (10%), M tolerance (20%)
6.3 – 75 V
Refer to Part Number Electrical Specification Table
Refer to Part Number Electrical Specification Table
Refer to Part Number Electrical Specification Table
(rated voltage up to +85°C and 66% of rated voltage applied at 125°C)
T551 according to MIL-PRF-39006, T556 bulk
KEMET does not recommend storage above 85°C.
* Additional case sizes and capacitance/voltage are under development.
© KEMET Electronics Corporation • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
T2072_T551 • 8/18/2023
2
Tantalum Polymer Capacitors – Hermetically Sealed
T551 Axial & T556 Surface Mount 125°C
Qualification - T551
Test Performed
Method Reference
Test Conditions
Reliability and Environmental Tests
AC Ripple Life at 85°C
MIL–PRF–39006
85°C, 40 kHz ripple current, 2,000 hours
85°C Life
MIL–PRF–39006
85°C, rated voltage, 2,000 hours
125°C Life
KEMET Standard
125°C, 0.66 x rated voltage, 2,000 hours
Surge Voltage
MIL–PRF–39006
85°C, 1.15 x rated voltage, 1,000 cycles, except delta cap shall be +10%/−20%
Surge Current
MIL–PRF–39003
+25 °C, 10 cycles (Option A), Option B available
Low Temperature Storage
MIL–PRF–39006
−62°C for 72 hours followed by 1 hour at 125°C
Reverse Voltage
KEMET Catalog
1 V for 8 hours maximum at 25°C, 1 V for 2 hours maximum at 70°C
Physical, Mechanical and Process Tests
Visual and Mechanical
Examination (Internal and
External)
MIL–PRF–39006
Case dimensions, marking
Terminal Strength
MIL–PRF–39006
Pull test and wire lead bend test
Resistance to Solvents
MIL–PRF–39006
Immersion in (3) solvents
Resistance to Soldering Heat
MIL–PRF–39006
Immersed to within 0.05 inch of capacitor body
Solderability
MIL–PRF–39006
Depth of insertion in flux and solder to within 0.062 inch of welded joint
Shock and Vibration
MIL–STD–202,
Methods 213, 204
Shock Method 213, Condition I, 100 g peak, Vibration Method 204,
Condition D, 20 g peak
Barometric Pressure
(Reduced)
MIL–PRF–39006
Salt Atmosphere (Corrosion)
MIL–PRF–39006
Subjected to fine mist of salt solution
Moisture Resistance
MIL–PRF–39006
65°C at 6 volts
Dielectric Withstanding
Voltage
MIL–PRF–39006
Insulation Resistance
MIL–PRF–39003
150,000 feet for 5 minutes, voltage applied for 1 minute
2,000 VDC, 60 seconds, sleeving examined for evidence of breakdown
500 VDC, 1 minute, insulation resistance not less than 1,000 MΩ
Electrical Characterization
Temperature Stability
Frequency Scan
Reference MIL–PRF–39006
KEMET Standard
© KEMET Electronics Corporation • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
−55°C to 105°C
Impedance, ESR and capacitance versus frequency
T2072_T551 • 8/18/2023
3
Tantalum Polymer Capacitors – Hermetically Sealed
T551 Axial & T556 Surface Mount 125°C
Qualification - T556
Test Performed
Method Reference
Test Conditions
Reliability and Environmental Tests
105°C Life
KEMET Standard
Surge Voltage
105°C, 0.78 x rated voltage, 2,000 hours
MIL-PRF-39006
85°C, 1.15 x rated voltage, 1,000 cycles, except delta cap shall be +10%/–20%
Physical, Mechanical and Process Tests
Visual and Mechanical
Examination (Internal and
External)
MIL-PRF-39003
Case dimensions, marking
Terminal Strength
MIL-PRF-39006
Pull test and wire lead bend test
Resistance to Solvents
MIL-PRF-39006
Immersion in (3) solvents
Resistance to Soldering Heat
MIL-PRF-39006
Immersed to within 0.05 inch of capacitor body
Solderability
MIL-PRF-39006
Depth of insertion in flux and solder to within 0.062 inch of welded joint
Shock and Vibration
MIL-STD-202,
Methods 213, 204
Shock Method 213, Condition I, 100 g peak, Vibration Method 204,
Condition D, 20 g peak
Temperature Stability
Reference MIL-PRF-39006
Electrical Characterization
–55°C to 105°C
Environmental Compliance
Epoxy compliant with UL 94 V–0.
© KEMET Electronics Corporation • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
T2072_T551 • 8/18/2023
4
Tantalum Polymer Capacitors – Hermetically Sealed
T551 Axial & T556 Surface Mount 125°C
Electrical Characteristics
ESR vs. Frequency
ESR (Ohms)
10.0
+125°C
+50°C
0°C
−55°C
1.0
+85°C
+25°C
−25°C
−80°C
0.1
0.0
10
100
1,000
10,000
100,000
1,000,000
10,000,000
Frequency (Hz)
Capacitance vs. Frequency
120
Capacitance (µF)
100
80
60
40
+125°C
+50°C
0°C
−55°C
20
0
10
+85°C
+25°C
−25°C
−80°C
100
1,000
10,000
100,000
1,000,000
Frequency (Hz)
© KEMET Electronics Corporation • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
T2072_T551 • 8/18/2023
5
Tantalum Polymer Capacitors – Hermetically Sealed
T551 Axial & T556 Surface Mount 125°C
Dimensions – Inches (Millimeters)
T551
SIDE VIEW
0.094 (2.39) Maximum
END VIEW
1.50 ±0.250
(38.10 ±6.35)
J
D
+
M
L
Case Code
B
Case Size
Insulated Case
Uninsulated Case
MIL-PRF-39006
L
±0.031 (0.79)
D
+0.016 (0.41)
−0.015 (0.38)
M
±0.002 (0.05)
J
maximum
D
+0.016 (0.41)
−0.015 (0.38)
L
± 0.031 (0.79)
T2
0.650 (16.51)
0.279 (7.09)
0.025 (0.64)
0.822 (20.88)
0.289 (7.34)
0.686 (17.42)
Dimensions – Millimeters
T556
CATHODE (−) END VIEW
SIDE VIEW
BOTTOM VIEW
A
W
F
H
S
S
L
Weight (g)
Case Code
B
Surface mount
L ±0.5
W ±0.5
H ±0.5
F ±0.5
S minimum
Average
24.5
8.5
9.1
4.2
3.0
5.54
© KEMET Electronics Corporation • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
T2072_T551 • 8/18/2023
6
Tantalum Polymer Capacitors – Hermetically Sealed
T551 Axial & T556 Surface Mount 125°C
Table 1A – Ratings & Part Number Reference
Rated
Voltage
Rated
Capacitance
Case
Size
(V) 85°C
µF
KEMET/EIA
6.3
8
8
10
10
10
15
15
15
25
25
30
30
40
40
50
50
50
50
60
60
60
75
140
220
680
100
180
560
70
120
390
50
100
40
68
100
120
25
47
100
120
20
39
100
75
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
KEMET
Part Number
T551B147(1)006A(2)
T551B227(1)008A(2)
T551B687(1)008A(2)
T551B107(1)010A(2)
T551B187(1)010A(2)
T551B567(1)010A(2)
T551B706(1)015A(2)
T551B127(1)015A(2)
T551B397(1)015A(2)
T551B506(1)025A(2)
T551B107(1)025A(2)
T551B406(1)030A(2)
T551B686(1)030A(2)
T551B107(1)040A(2)
T551B127(1)040A(2)
T551B256(1)050A(2)
T551B476(1)050A(2)
T551B107(1)050A(2)
T551B127(1)050A(2)
T551B206(1)060A(2)
T551B396(1)060A(2)
T551B107(1)060A(2)
T551B756(1)075A(2)
DC
Leakage
DF
Maximum
ESR
Ripple
Current
µA at 25°C Maximum/
5 Minutes
% at 25°C
120 Hz Max
mΩ at 25°C
100 kHz
mArms at
85°C/40 kHz
6.3
13.2
40.8
7.5
13.5
42.0
7.9
13.5
43.9
9.4
18.8
9.0
15.3
30.0
36.0
9.4
17.6
37.5
45.0
9.0
17.6
45.0
42.2
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
120
120
90
140
110
90
140
110
90
170
190
170
140
150
120
170
150
130
90
200
160
100
110
1,510
1,510
1,750
1,400
1,580
1,750
1,400
1,580
1,750
1,275
1,200
1,275
1,400
1,350
1,510
1,275
1,350
1,450
1,750
1,175
1,310
1,660
1,580
(1) To complete KEMET part number, insert M for ±20% or K for ±10%. Designates capacitance tolerance.
(2) To complete KEMET part number, insert T = 100% matte tin (Sn)-plated, H = standard solder coated (SnPb 5% Pb minimum). Designates termination
finish.
Refer to Ordering Information for additional detail.
Higher voltage ratings and tighter tolerance product including ESR may be substituted within the same size at KEMET's option. Voltage substitution will
be marked with the higher voltage rating. The 85°C 40 kHz ripple limit is based on the maximum allowed power at 85°C and the maximum expected ESR
at 40 kHz. For this calculation, the 100 kHz ESR limit is multiplied by a factor of 1.3 to account for the frequency dependence of ESR.
© KEMET Electronics Corporation • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
T2072_T551 • 8/18/2023
7
Tantalum Polymer Capacitors – Hermetically Sealed
T551 Axial & T556 Surface Mount 125°C
Table 1B – Ratings & Part Number Reference
Rated
Voltage
Rated
Capacitance
Case
Size
(V) 85°C
µF
KEMET/EIA
6.3
8
8
10
10
10
15
15
15
25
25
30
30
40
40
50
50
50
50
60
60
60
75
140
220
680
100
180
560
70
120
390
50
100
40
68
100
120
25
47
100
120
20
39
100
75
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
KEMET
Part Number
T556B147(1)006A(2)
T556B227(1)008A(2)
T556B687(1)008A(2)
T556B107(1)010A(2)
T556B187(1)010A(2)
T556B567(1)010A(2)
T556B706(1)015A(2)
T556B127(1)015A(2)
T556B397(1)015A(2)
T556B506(1)025A(2)
T556B107(1)025A(2)
T556B406(1)030A(2)
T556B686(1)030A(2)
T556B107(1)040A(2)
T556B127(1)040A(2)
T556B256(1)050A(2)
T556B476(1)050A(2)
T556B107(1)050A(2)
T556B127(1)050A(2)
T556B206(1)060A(2)
T556B396(1)060A(2)
T556B107(1)060A(2)
T556B756(1)075A(2)
DC
Leakage
DF
Maximum
ESR
Ripple
Current
µA at 25°C Maximum/
5 Minutes
% at 25°C
120 Hz Max
mΩ at 25°C
100 kHz
mArms at
85°C/40 kHz
6.3
13.2
40.8
7.5
13.5
42.0
7.9
13.5
43.9
9.4
18.8
9.0
15.3
30.0
36.0
9.4
17.6
37.5
45.0
9.0
17.6
45.0
42.2
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
120
120
90
140
110
90
140
110
90
170
190
170
140
150
120
170
150
130
90
200
160
100
110
1,510
1,510
1,750
1,400
1,580
1,750
1,400
1,580
1,750
1,275
1,200
1,275
1,400
1,350
1,510
1,275
1,350
1,450
1,750
1,175
1,310
1,660
1,580
(1) To complete KEMET part number, insert M for ±20% or K for ±10%. Designates capacitance tolerance.
(2) To complete KEMET part number, insert T = 100% matte tin (Sn)-plated, H = standard solder coated (SnPb 5% Pb minimum). Designates termination
finish.
Refer to Ordering Information for additional detail.
Higher voltage ratings and tighter tolerance product including ESR may be substituted within the same size at KEMET's option. Voltage substitution will
be marked with the higher voltage rating. The 85°C 40 kHz ripple limit is based on the maximum allowed power at 85°C and the maximum expected ESR
at 40 kHz. For this calculation, the 100 kHz ESR limit is multiplied by a factor of 1.3 to account for the frequency dependence of ESR.
© KEMET Electronics Corporation • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
T2072_T551 • 8/18/2023
8
Tantalum Polymer Capacitors – Hermetically Sealed
T551 Axial & T556 Surface Mount 125°C
Recommended Voltage Derating Guidelines
120%
78% of VR
100%
% Change in working DC
voltage with temperature
VR
Recommended maximum
application voltage
(as % of rated voltage)
80% of VR
63% of VR
66% of VR
53% of VR
% Working Voltage
−55°C to 85°C 85°C to 105°C 105°C to 125°C
% Change in working DC voltage with temperature
80%
80%
66%
60%
Recommended maximum application voltage
(as % of rated voltage)
40%
53%
20%
0%
−55
25
45
85
105
125
Temperature (°C)
Ripple Current/Ripple Voltage
Permissible AC ripple voltage and current are related to equivalent series resistance (ESR) and the power dissipation
capabilities of the device. Permissible AC ripple voltage that may be applied is limited by two criteria:
1. The positive peak AC voltage plus the DC bias voltage, if any, must not exceed the DC voltage rating of the capacitor.
2. The negative peak AC voltage in combination with bias voltage, if any, must not exceed the allowable limits specified
for reverse voltage.
The maximum power dissipation by case size can be determined using the below left table. The maximum power dissipation
rating stated in the table must be reduced with increasing environmental operating temperatures. Refer to the below right
table for temperature compensation requirements.
Case Code
KEMET
MIL–PRF–39006/22/
25/30/31 Case size
B*
T2
Maximum Power
Dissipation (Pmax)
mWatts at 25°C
with +60°C Rise
715
* Applies to TH and SMD
Temperature Compensation Multipliers for
Maximum Power Dissipation (Pmax)
T ≤ 45°C
1.00
45°C < T ≤ 85°C
0.70
85°C < T ≤ 125°C
0.10
T = Environmental temperature
© KEMET Electronics Corporation • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
Using the Pmax of the device, the maximum allowable rms
ripple current or voltage may be determined.
I(max) = √Pmax /R
E(max) = Z √Pmax /R
I = rms ripple current (amperes)
E = rms ripple voltage (volts)
Pmax = maximum power dissipation (watts)
R = ESR at specified frequency (ohms)
Z = Impedance at specified frequency (ohms)
The maximum power dissipation rating must be reduced with increasing
environmental operating temperatures. Refer to the Temperature
Compensation Multiplier table for details.
T2072_T551 • 8/18/2023
9
Tantalum Polymer Capacitors – Hermetically Sealed
T551 Axial & T556 Surface Mount 125°C
Reverse Voltage
Solid tantalum polymer capacitors are polar devices and may be permanently damaged or destroyed if connected with
the wrong polarity. A small reverse voltage is permissible for time periods per the below table. KEMET can offer lower
capacitance in this voltage with higher reverse voltage capability. In addition, we continue to improve our capability for this
characteristic.
Temperature
Permissible Reverse Voltage
25°C
70°C
1 V for 8 hours maximum
1 V for 2 hours maximum
Table 2 – Land Dimensions/Courtyard
KEMET
Metric
Size
Code
Density Level A:
Maximum (Most) Land
Protrusion (mm)
Case
EIA
W
L
B
3528–21
4.73
4.86
S
V1
17.015 27.62
Density Level B:
Median (Nominal) Land
Protrusion (mm)
V2
W
L
10
4.61
4.46
S
V1
17.215 26.52
Density Level C:
Minimum (Least) Land
Protrusion (mm)
V2
W
L
9.5
4.51
4.08
S
V1
17.375 25.81
V2
9.24
Density Level A: For low-density product applications. Recommended for wave solder applications and provides a wider process window for reflow
solder processes.
Density Level B: For products with a moderate level of component density. Provides a robust solder attachment condition for reflow solder processes.
Density Level C: For high component density product applications. Before adapting the minimum land pattern variations the user should perform
qualification testing based on the conditions outlined in IPC standard 7351 (IPC–7351).
V1
L
L
W
W
V2
S
Grid Placement Courtyard
© KEMET Electronics Corporation • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
T2072_T551 • 8/18/2023
10
Tantalum Polymer Capacitors – Hermetically Sealed
T551 Axial & T556 Surface Mount 125°C
Soldering Process
Optimum Solder Wave Profile
Hand Soldering (Manual)*
Manual Solder Profile with Pre-heating
Solder Wave Peak
Temperature 260ºC
Entrance to Solder Wave
250
225
200
175
150
125
100
75
50
25
Preheat Zone
Exit from
Solder
Machine
80ºC
to 120ºC
Entrance
to Solder
Machine
Soldering
Hot Air Debridging
Free
Air
Cool
Bottom Side
Temperature
Range
Gradual Cooling
Entrance to
In-Line Cleaner
Exit from
In-Line Cleaner
(time in cleaner
may be less)
Delta T < = 120ºC
Immersion in
Cleaning
Vapor
150ºC
Maximum
Top Side
Nominal
0
1
2
3
Time (Minutes)
4
5
6
Gradual Preheat
60 – 120 Seconds
Recommend 2.5°C/second
Maximum 3 seconds
Degrees – Cº
Flux Zone
Exit from Solder Wave
(Time in Wave – 2 to 4 Seconds)
*T555 MUST be hand soldered only.
Mounting
WARNING: T555/T556 MUST BE HAND SOLDERED. THE USE OF STANDARD SMD PROCESSES FOR BOARD MOUNT WILL
CAUSE IRREVERSIBLE DAMAGE TO THIS PRODUCT.
T555 SMD
In hand-soldering tantalum polymer SMT capacitors, a manufacturer can utilize two (2) soldering methodologies that
include pre-heating or not pre-heating the capacitors. KEMET recommends utilizing a pre-heating technique. However,
due to the large temperature gradient between the capacitors and the tip of the soldering iron, take extreme caution in this
process. The thermal stresses from the large thermal gradients and the propensity of the operator touching the tip of the
soldering iron to the device can lead to mechanical and/or electrical damage.
When manually soldering, it is important the soldering process be carefully monitored and carried out so that the
temperature gradient falls within the recommended conditions above (profile).
© KEMET Electronics Corporation • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
T2072_T551 • 8/18/2023
11
Tantalum Polymer Capacitors – Hermetically Sealed
T551 Axial & T556 Surface Mount 125°C
Mounting (cont'd.)
Process 1 (with preheating)
1) Utilize 1.0 mm thread eutectic solder with soldering flux in the core. Either a rosin-based or non-activated flux is
recommended.
2) The capacitors shall be pre-heated so that the temperature gradient between the devices and the tip of the soldering iron
is Delta T < = 120°C or below.
3) The temperature of the solder iron tip should not exceed 270°C.
4) The required amount of solder shall be melted in advance on the soldering tip.
5) After soldering, the capacitors shall be cooled gradually at room ambient temperature. Forced air cooling is not
recommended.
Process 2 (without preheating)
1) Soldering iron tip shall never directly touch the termination egress or the case body of the capacitors.
2) Lands are sufficiently pre-heated with a soldering iron tip before sliding the soldering iron tip to the terminal electrode of
the capacitor for soldering.
Reference
Condition
Case Size
All
Temperature of soldering iron
270°C
Wattage
20 W maximum
Shape of soldering iron
3 mm maximum
Soldering time with soldering iron
3 seconds maximum
T551 Through-Hole
All encased capacitors will pass the resistance to soldering heat test of MIL-STD-202, Method 210, Condition C. This test
simulates wave solder of topside board mount product. This demonstration of resistance to solder heat is in accordance
with what is believed to be the industry standard. More severe treatment must be considered reflective of an improper
soldering process. The above figure is a recommended solder wave profile for both axial and radial leaded solid tantalum
capacitors.
Additional mounting recommendations (SMD and Through-Hole):
In order to increase the board mount integrity of KEMET's Polymer Hermetic Sealed (SMD or TH version) relative to
mechanical shock and vibration, KEMET recommends the use of an adhesive between the component and the PCB. This
is defined in the Space Application Electronic Hardware Addendum to J-STD-001 (Requirements for Solder Electrical and
Electronic Assemblies.)
© KEMET Electronics Corporation • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
T2072_T551 • 8/18/2023
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Tantalum Polymer Capacitors – Hermetically Sealed
T551 Axial & T556 Surface Mount 125°C
Construction
T551
Wire Lead (−)
(100% Sn/SnPb)
Brass Can
Tantalum Pellet
(See Detail for
Layers)
Hermetic Seal System
(Ring)
Insulation
Sleeve
Detailed Cross Section
Wire Lead (+)
(100% Sn/SnPb)
Solder
Anode Tube
Hermetic Seal System
(Glass Seal and Ring)
Solder
Brass Can
Tantalum Wire
Hermetic Seal System
(Glass Seal)
Wire Lead (+)
(100% Sn/SnPb)
Carbon
(Third Layer)
Ta2O5 Dielectric
(First Layer)
Tantalum Wire
Anode Tube
Wire Lead (−)
(100% Sn/SnPb)
Silver Paint
(Fourth Layer)
Polymer
(Second Layer)
Tantalum
Solder
T556
Molded Epoxy
Case
Brass Can/
Insulation Sleeve
Hermetic Seal
System (Ring)
Tantalum
Pellet
Leadframe
(− Cathode)
770 Coating
90% Sn 10% Pb
Tantalum
Wire
Hermetic Seal System
(Glass Seal)
Anode
Tube
Molded Epoxy
Case
© KEMET Electronics Corporation • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
Leadframe
(+ Anode)
770 Coating
90% Sn 10% Pb
T2072_T551 • 8/18/2023
13
Tantalum Polymer Capacitors – Hermetically Sealed
T551 Axial & T556 Surface Mount 125°C
Capacitor Marking
T551
B Case
Series
Rated Capacitance
KT551
+
100µF
10% 60V
2010AAAA
KEMET ID
Capacitance
Tolerance,
Rated Voltage
(VDC)
Polarity Mark
4 Digit Date Code, Lot Code
T556
Series
KEMET
ID
Polarity Mark
Capacitance
Capacitance
Tolerance
Rated Voltage
4 Digit Date Code,
Lot Code
Date Code
1st & 2nd
Digit = Year
16 = 2016
17 = 2017
18 = 2018
19 = 2019
20 = 2020
3rd & 4th Digit =
Week of the Year
01 = 1st week
52 = 52nd week
© KEMET Electronics Corporation • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
T2072_T551 • 8/18/2023
14
Tantalum Polymer Capacitors – Hermetically Sealed
T551 Axial & T556 Surface Mount 125°C
Storage
Tantalum hermetically sealed and SMD capacitors should be stored in normal working environments. While the capacitors
themselves are quite robust in other environments, solderability will be degraded by exposure to high temperatures,
high humidity, corrosive atmospheres, and long term storage. In addition, packaging materials will be degraded by high
temperature – reels may soften or warp and tape peel force may increase. KEMET recommends that maximum storage
temperature not exceed 40°C and maximum storage humidity not exceed 60% relative humidity. Temperature fluctuations
should be minimized to avoid condensation on the parts and atmospheres should be free of chlorine and sulphur bearing
compounds. For optimized solderability capacitors stock should be used promptly, preferably within three years of receipt.
Packaging
Case Size
Bulk
8.5" Reel*
Ammo Pack
C-Spec
Blank
7200
7443
B Through-hole
–
20 per tray
150
250
B Surface mount
–
100 per box
N/A
* For orders greater than 150 pieces, a 12" reel (500 pieces/reel) will be sent.
Weight
Case Size
Average Weight
(grams)
KEMET
EIA
B Through-hole
T2
3.63
B Surface mount
–
5.54
© KEMET Electronics Corporation • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
T2072_T551 • 8/18/2023
15
Tantalum Polymer Capacitors – Hermetically Sealed
T551 Axial & T556 Surface Mount 125°C
KEMET Electronics Corporation Sales Offices
For a complete list of our global sales offi ces, please visit www.kemet.com/sales.
Disclaimer
All product specifi cations, statements, information and data (collectively, the “Information”) in this datasheet are subject to change. The customer is responsible for
checking and verifying the extent to which the Information contained in this publication is applicable to an order at the time the order is placed. All Information given
herein is believed to be accurate and reliable, but it is presented without guarantee, warranty, or responsibility of any kind, expressed or implied.
Statements of suitability for certain applications are based on KEMET Electronics Corporation’s (“KEMET”) knowledge of typical operating conditions for such
applications, but are not intended to constitute – and KEMET specifi cally disclaims – any warranty concerning suitability for a specifi c customer application or use.
The Information is intended for use only by customers who have the requisite experience and capability to determine the correct products for their application. Any
technical advice inferred from this Information or otherwise provided by KEMET with reference to the use of KEMET’s products is given gratis, and KEMET assumes
no obligation or liability for the advice given or results obtained.
Although KEMET designs and manufactures its products to the most stringent quality and safety standards, given the current state of the art, isolated component
failures may still occur. Accordingly, customer applications which require a high degree of reliability or safety should employ suitable designs or other safeguards
(such as installation of protective circuitry or redundancies) in order to ensure that the failure of an electrical component does not result in a risk of personal injury
or property damage.
Although all product–related warnings, cautions and notes must be observed, the customer should not assume that all safety measures are indicated or that other
measures may not be required.
KEMET is a registered trademark of KEMET Electronics Corporation.
© KEMET Electronics Corporation • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
T2072_T551 • 8/18/2023
16
