Capacitor
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Wet-Tantalum Capacitor Technology – For high-power implantable device applications, Greatbatch’s proprietary wet-tantalum high-voltage capacitor technology—available in customized shapes and sizes—has a high energy density, requires little or no reformation, is extremely efficient (conserving battery energy), and has very low DC leakage.
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• Wet-Tantalum Capacitor (PDF)
• Capacitor Tech Sheet (PDF)
Electrical Characteristics
Capacitance: Customer Specified +/- 5%
Surge Voltage @ 37°C: 215 Volts
DC Leakage: ‹150 microamps (after 5 minutes at rated voltage)
ESR @120Hz: ‹1.35 ohms
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Volumetric Energy Density*: |
1st Pulse |
2nd Pulse |
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(based on input energy) |
7.6 J/cc |
7.1 J/cc |
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(based on output energy) |
6.0 J/cc |
6.0 J/cc |
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Gravimetric Energy Density*: |
1st Pulse |
2nd Pulse |
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(based on input energy) |
1.35 J/g |
1.25 J/g |
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(based on output energy) |
1.05 J/g |
1.05 J/g |
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Energy Efficiency*: |
› 76% |
› 82% |
* These nominal values are based on experimental data taken at 37°C. 10 milliamp charge current, 215V charge voltage, 16.7 ohm Discharge Load. Actual values will be dependent on capacitor configuration.
Life Test Graphs
Features and Benefits
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Feature |
Benefit |
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Multiple Voltage Options |
Can be tailored to the customer's needs. Current offerings are 185, 205, 207,
215, 227, 235, and 360 volts. 255 and 390 volt capacitor technology is in
development |
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Capacitance |
Specifically designed to customer needs |
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High Volumetric Energy Density |
High energy density means smaller capacitors and smaller devices |
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Little to no reform of the capacitor is required |
Increased device longevity or smaller battery. Little to no reform requirements
means more of the stored energy of the battery can be used to deliver therapy to
the patient |
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Custom Form Factors |
Can be designed in numerous geometries including flat prismatic and cylindrical |
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High Efficiency |
High efficiency means more of the battery energy is delivered to the patient.
Thus, for the same longevity, the battery can be smaller |
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DC Leakage |
Low DC Leakage (typically below 1 nA/μF*V) is an indicator of the quality of the
dielectric. DC Leakage is reflected in increased efficiency and higher delivered
energies |
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Research and Development Expertise |
GB scientists are working at the cutting edge of wet tantalum capacitor technology
with a proven history of achieving ever higher operating voltages and volumetric
energy densities. |
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Product Reliability |
With over 1 million GB capacitors in the field, we have not experienced even one
failure. GB carefully designs, qualifies, and tests our capacitors to ensure
quality every step along the way. |
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R&D Expertise |
GB stands ready to partner with customers early in their device design to optimize
capacitor and device designs enabling breakthroughs in technology. |
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