Conductive Polymer Hybrid Aluminum Electrolytic Capacitors

Notes for using technical information.
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Achieves low ESR, high withstand voltage, and high reliability through the use of the "hybrid electrolyte" consisting of conductive polymer and electrolytic liquid.
Products with vibration-resistance specifications can also be produced (ø6.3 ≤).

Topics

What is Conductive-Polymer Hybrid Aluminum Electrolytic-Capacitor

Capacitor achieved both high performance and high reliability

  • Capacitor with the electrolyte fused with conductive polymer and electrolyte liquid
  • As features of both conductive polymer and electrolyte liquid, large ripple current(low Equivalent Series Resistance : ESR), low leakage current and high reliability contribute to downsizing and high reliability of the equipment
  • Suitable for automotive equipment and base stations which need compact and high reliability components.

Structure Diagram

hybrid Structure Diagram

Comparisons with conventional capacitors
Classification Aluminum electrolyte Conductive solid Hybrid
Electrolyte Electrolyte liquid Conductive-polymer Conductive-polymer + Electrolyte liquid
Static capacitance ✓✓ Large Low ✓✓ Large
LC Leakage current ✓✓ Low High ✓✓ Low
Humidity resistance ✓✓ 85°C 85%RH 60°C 95%RH ✓✓ 85°C 85%RH
Ripple current Low ✓✓ Large ✓✓ Large
ESR ( Equivalent Series Resistance ) High ✓✓ Low ✓✓ Low

✓✓ : Very good      ✓ : Good

Characteristic comparison with aluminum electrolytic capacitors, replacement examples

Capacitance frequency characteristics

Hybrid capacitor : 50V 10μF (ø5x6)
Aluminum electrolytic capacitor : 25V 100μF (ø6.3x6)

In the high frequency band, a aluminum electrolytic capacitor with large capacitance can be replaced with the hybrid capacitor with small-sized and small-capacitance.

ESR(100kHz) temperature characteristics

Hybrid capacitor : 35V 47μF (ø6.3x6)
Aluminum electrolytic capacitor : 35V 330μF (ø10x10)

The hybrid capacitor has stable ESR characteristics from high temperature to low temperature, so it can be replaced with a small-sized hybrid capacitor.

* Please see this video for details.
Hybrid Capacitors demonstration

Replacement of aluminum electrolytic capacitors with hybrid capacitors

  Aluminum electrolytic capacitor
35V 330μF
Size
ø10.0x10.2 mm
Capacitance(300kHz) 11 μF
ESR (300kHz) 47 mΩ
capacitance 1190 mA rms
Input voltage waveform to capacitor

frequency : 300 kHz
VIn: DC 12 V +600 mVp-p
28 mVp-p
Mounting area 100 % (132 mm2)
Hybrid capacitor
35V 47μF
ZC series

ø6.3x5.8 mm
23 μF
20 mΩ
1300 mA rms
23 mVp-p
41 % (54 mm2)

In the high frequency band, a aluminum electrolytic capacitor with large capacitance can be replaced with the hybrid capacitor with small-sized and small-capacitance.

Characteristic comparison with ceramic capacitors (MLCC), replacement examples

DC bias characteristics of capacitance

Hybrid capacitor:25V 22μF, (ø5x5.8)
MLCC : 25V 22μF, x5R, (3.2x1.6)

Hybrid capacitors have no change in capacitance due to DC bias
The capacitance of MLCCs is greatly reduced by DC bias.

Replacement of MLCCs with hybrid capacitors

  MLCC   Hybrid capacitor
Mounted circuit area imag Mounted circuit area imag Mounted circuit area imag :area-35%
Series, part number - ZA Series EEHZA1E220R
specification 25 V, 22 µF, 3.2 x 1.6 mm 25 V, 22 µF, ø5 x 5.8 mm
Quantity 5 pcs 1 pc
Effective capacitance 22 µF
22 μF x 5 pcs x 20% = 22 μF
(Capacitance reduced by 15 VDC)
22 μF
(No Capacitance reduced by 15VDC)

Since the capacitance of MLCCs is reduced by applying voltage,
replacing MLCCs with hybrid capacitors can reduced quantities and space.

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