New and Robust Hybrid-Polymer Aluminium Electrolytic Capacitors

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  • Offers impressive heat dissipation and has a stable mechanical design
  • Typically used in automotive and industrial applications

TDK Corporation has extended its product range of hybrid-polymer aluminium electrolytic capacitors by now offering two new series: the B40600 / B40700 series. They are designed for rated voltages of 25 V and 35 V and cover a capacitance range from 780 µF to 2200 µF. Capacitors in the 63 V voltage class with capacitance values from 390 µF to 720 µF are available with the B40640 / B40740 series.

The inner structure of all axial hybrid-polymer aluminium electrolytic capacitors is optimized for the thermal connection to a heatsink. Thanks to the stable mechanical design, a reliable long-term connection to the heat sink can be achieved, thereby offering excellent heat dissipation. For designs with heat sinks, versions without shrink-on sleeves are offered in both series, while for freestanding assembly, components with a PET shrink-on sleeve are available.

Both series are designed for a wide range of operating temperatures from -55 degrees Celsius to 150 degrees Celsius with a useful life of 4000 hours at 125 degrees Celsius. An advantage of hybrid-polymer technology is its extremely low ESR values across the wide temperature range. For example, with a can size of 16 x 30 mm and an ambient temperature of 20 degrees Celsius, an ESR of 3.5 mΩ can be achieved.

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These capacitors are typically used in automotive and industrial applications. Examples include bidirectional converters for 48 V on-board supplies, electrically- driven power steering systems, electrical turbochargers and superchargers and gearbox controls.

Other applications include:

  • Motor inverters of hybrid drives
  • Water pumps
  • Radiator cooling fans
  • Output filters for switch-mode power supplies

The capacitors are produced in four can sizes ranging from 14 x 25 mm to 16 x 30 mm. These are available in an axial-lead design (B406) or as a solder star version (B407), providing a wide variety of mounting options.


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