TDK Electronics · TDK Europe

September 13, 2016

Aluminum electrolytic capacitors: More compact designs for snap-in versions


TDK Corporation presents more compact versions within the B43640* and B43644* series of aluminum electrolytic capacitors with a snap-in design for rated voltages of 400 V and 450 V. In comparison with the previous versions they are up to 15 percent more compact. All types are suitable for a maximum operating temperature of 105 °C.

All versions of series B43640* are designed for a useful life of 2000 hours. They offer capacitances of between 120 µF and 1000 µF (400 V), and between 82 µF and 820 µF (450 V). Depending on the rated capacitance and voltage, the dimensions are within the standardized grid of between 22 mm x 25 mm and 35 mm x 55 mm (d x h).

The entire range of the B43644* series, on the other hand, has a useful life of 5000 hours. They cover capacitance ranges of between 100 µF and 820 µF (400 V), or between 68 µF and 680 µF (450 V). The dimensions of these types are within the standardized grid of between 22 mm x 25 mm and 35 mm x 55 mm (d x h).

The new capacitors are suitable, among other things, for the use in converters, power supplies and household appliances. In order to calculate the precise useful life of aluminum electrolytic capacitors, the use of the web-based EPCOS AlCap Useful Life Calculation Tool is recommended. This can be found at

Main applications

  • Converters, power supplies and household appliances

Main features and benefits

  • Very compact dimensions of between 22 mm x 25 mm and 35 mm x 55 mm (diameter x height).

Key data

SeriesRated voltage
Dimensions, d x h
Useful life at 105 °C
400120 to 100022 x 25 to 35 x 502000
B43640*45082 to 82022 x 25 to 35 x 552000
B43644*400100 to 82022 x 25 to 35 x 505000
B43644*45068 to 68022 x 25 to 35 x 555000

Further information on the products can be found under



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 2016, TDK posted total sales of USD 10.2 billion and employed about 92,000 people worldwide.

* 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.

Media Contact

Christoph Jehle TDK Electronics AG Munich/Germany Phone +49 89 54020-2441 Get in contact
Debbie Martin TDK Electronics Inc. Fountain Hills, AZ/USA Phone +1 480 836-4104 Get in contact
Candido Dall'Agnoll TDK Electronics do Brasil Ltda. São Paulo/Brazil Phone +55 51 3484-7007 Get in contact
Himalaya Baghel TDK India Private Limited Mumbai/India Phone +91 12 04 50 58 42 Get in contact
Stella Suen TDK Electronics Hong Kong Limited Phone +852 3669-8224 Get in contact
Vincent Gaff Tronic's Microsystems SA Phone +33 4 76 97 29 60 Get in contact

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