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 Ta
2
O
5
dielectric. A conductive,
organic polymer replaces the traditionally used MnO
2
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 MnO
2
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)
One world. One KEMET
© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
T2072_T551 • 3/31/2020
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
Capacitor
Class
T=
Tantalum
551
Series
551 =
Axial
Leaded
PHS
556 =
Surface
Mount
PHS
B
107
M
025
A
Product
Level
A = N/A
T
Termination
Finish
T = 100% tin
(Sn)-plated
H = Tin/
lead (SnPb)
solder
coated (5%
Pb minimum)
4251
Surge Option*
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
Case Capacitance Capacitance
Rated Voltage
Size
Code (pF)
Tolerance
(VDC)
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
* Only for T551 (Surge options/packaging)
Performance Characteristics
Item
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 – 60 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
Performance Characteristics
KEMET does not recommend storage above 85°C.
* Additional case sizes and capacitance/voltage are under development.
© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
T2072_T551 • 3/31/2020
2
Tantalum Polymer Capacitors – Hermetically Sealed
T551 Axial & T556 Surface Mount 125°C
Qualification - T551
Test Performed
AC Ripple Life at 85°C
85°C Life
125°C Life
Surge Voltage
Surge Current
Low Temperature Storage
Reverse Voltage
Visual and Mechanical
Examination (Internal and
External)
Terminal Strength
Resistance to Solvents
Resistance to Soldering Heat
Solderability
Shock and Vibration
Barometric Pressure
(Reduced)
Salt Atmosphere (Corrosion)
Moisture Resistance
Dielectric Withstanding
Voltage
Insulation Resistance
Temperature Stability
Frequency Scan
Method Reference
Reliability and Environmental Tests
MIL–PRF–39006
MIL–PRF–39006
KEMET Standard
MIL–PRF–39006
MIL–PRF–39003
MIL–PRF–39006
KEMET Catalog
Test Conditions
85°C, 40 kHz ripple current, 2,000 hours
85°C, rated voltage, 2,000 hours
125°C, 0.66 x rated voltage, 2,000 hours
85°C, 1.15 x rated voltage, 1,000 cycles, except delta cap shall be +10%/−20%
+25 °C, 10 cycles (Option A), Option B available
−62°C for 72 hours followed by 1 hour at 125°C
1 V for 8 hours maximum at 25°C, 1 V for 2 hours maximum at 70°C
Physical, Mechanical and Process Tests
MIL–PRF–39006
MIL–PRF–39006
MIL–PRF–39006
MIL–PRF–39006
MIL–PRF–39006
MIL–STD–202,
Methods 213, 204
MIL–PRF–39006
MIL–PRF–39006
MIL–PRF–39006
MIL–PRF–39006
MIL–PRF–39003
Reference MIL–PRF–39006
KEMET Standard
Case dimensions, marking
Pull test and wire lead bend test
Immersion in (3) solvents
Immersed to within 0.05 inch of capacitor body
Depth of insertion in flux and solder to within 0.062 inch of welded joint
Shock Method 213, Condition I, 100 g peak, Vibration Method 204,
Condition D, 20 g peak
150,000 feet for 5 minutes, voltage applied for 1 minute
Subjected to fine mist of salt solution
65°C at 6 volts
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
−55°C to 105°C
Impedance, ESR and capacitance versus frequency
© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
T2072_T551 • 3/31/2020
3
Tantalum Polymer Capacitors – Hermetically Sealed
T551 Axial & T556 Surface Mount 125°C
Qualification - T556
Test Performed
105°C Life
Surge Voltage
Visual and Mechanical
Examination (Internal and
External)
Terminal Strength
Resistance to Solvents
Resistance to Soldering Heat
Solderability
Shock and Vibration
Method Reference
Reliability and Environmental Tests
KEMET Standard
MIL-PRF-39006
Test Conditions
105°C, 0.78 x rated voltage, 2,000 hours
85°C, 1.15 x rated voltage, 1,000 cycles, except delta cap shall be +10%/–20%
Physical, Mechanical and Process Tests
MIL-PRF-39003
MIL-PRF-39006
MIL-PRF-39006
MIL-PRF-39006
MIL-PRF-39006
MIL-STD-202,
Methods 213, 204
Reference MIL-PRF-39006
Case dimensions, marking
Pull test and wire lead bend test
Immersion in (3) solvents
Immersed to within 0.05 inch of capacitor body
Depth of insertion in flux and solder to within 0.062 inch of welded joint
Shock Method 213, Condition I, 100 g peak, Vibration Method 204,
Condition D, 20 g peak
Electrical Characterization
Temperature Stability
–55°C to 105°C
Environmental Compliance
Epoxy compliant with UL 94 V–0.
© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
T2072_T551 • 3/31/2020
4
Tantalum Polymer Capacitors – Hermetically Sealed
T551 Axial & T556 Surface Mount 125°C
Electrical Characteristics
ESR vs. Frequency
10.0
+125°C
+50°C
0°C
−55°C
+85°C
+25°C
−25°C
−80°C
ESR (Ohms)
1.0
0.1
0.0
10
100
1,000
10,000
100,000
1,000,000
10,000,000
Frequency (Hz)
Capacitance vs. Frequency
120
100
80
60
40
20
0
+125°C
+50°C
0°C
−55°C
10
100
+85°C
+25°C
−25°C
−80°C
1,000
10,000
100,000
1,000,000
Capacitance (µF)
Frequency (Hz)
© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
T2072_T551 • 3/31/2020
5
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