November 13, 2012

Aluminum electrolytic capacitors: Extended rated voltages for industrial applications

TDK Corporation has extended the range of EPCOS aluminum electrolytic capacitors by types with higher rated voltages. For the screw terminal types in the new B43700* and B43720* series, the previous rated voltage of 550 V DC has been raised to 600 V DC. These capacitors cover a capacitance range from 1200 µF to 6800 µF and are designed for temperatures up to 85 °C. They have dimensions of only 64 x 106 mm to 91 x 221 mm (d x l), depending on the type. The new B43541* snap-in series also has a rated voltage of 600 V DC (previously 550 V DC); its capacitance values range between 47 µF and 330 µF. This series is also designed for temperatures up to 85 °C.

EPCOS aluminum electrolytic capacitors designed for temperatures up to 105 °C now also offer a higher rated voltage: for screw terminal types of the B43740* and B43760* series, this is now 500 V DC (previously 450 V DC). For the snap-in types of the new B43544* series, the previous voltage of 500 V DC has been raised to 550 V DC.

Thanks to these significant voltage increases, developers of industrial power supplies and frequency converters for drives, inverters for photovoltaic systems, and converters for wind power plants now need fewer capacitors in series in the DC link, thus reducing costs.

Main applications

  • Use as DC link capacitors in industrial power supplies and frequency converters for drives, inverters for photovoltaic, and converters in wind power plants

Main features and benefits

  • Rated voltages increased to 600 V DC (previously 550 V DC), 550 V DC (previously 500 V DC) and 500 V DC (previously 450 V DC)
  • Fewer series connected capacitors required in the DC link
  • Lower costs

About TDK Corporation

TDK Corporation is a leading electronics company based in Tokyo, Japan. It was established in 1935 to commercialize ferrite, a key material in electronic and magnetic products. TDK's portfolio includes electronic components, modules and systems marketed under the product brands TDK and EPCOS, power supplies, magnetic application products as well as energy devices, flash memory application devices, and others. TDK focuses on demanding markets in the areas of information and communication technology and consumer, automotive and industrial electronics. The company has a network of design and manufacturing locations and sales offices in Asia, Europe, and in North and South America. In fiscal 2012, TDK posted total sales of USD 9.9 billion and employed about 79,000 people worldwide.

About TDK-EPC Corporation

TDK-EPC Corporation, a TDK group company, is the manufacturer of TDK’s electronic components, modules and systems and is headquartered in Tokyo, Japan. TDK-EPC was founded on October 1, 2009, from the combination of the electronic components business of TDK and the EPCOS Group. The product portfolio includes ceramic, aluminum electrolytic and film capacitors, ferrites, inductors, high-frequency components such as surface acoustic wave (SAW) filter products and modules, piezo and protection components, and sensors.

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