TDK introduces two new DC link capacitor series optimized for on-board chargers in electric vehicles

February 19, 2026 

TDK Corporation (TSE: 6762) introduces the new B43655 and B43656 series of aluminum electrolytic capacitors designed specifically for DC links in on-board chargers (OBCs) of electric vehicles. Both series are optimized for forced cooling operation, supporting the growing trend toward higher voltages and currents in next-generation OBC platforms. Due to their compact design and high ripple current capability, such capacitors are commonly used in applications requiring maximum efficiency and reliability in confined spaces. 

With a high voltage rating of 475 V and 500 V, as well as capacitances ranging from 110 µF to 880 µF, the B43655 series meets the requirements of 800 V battery architectures for modern e-mobility applications. Designed for base cooling and high ripple current density, these components offer a useful life of more than 3,000 hours at +105 °C. They also feature a maximum ripple current of 3.29 A at +105 °C and ESR values down to 100 mΩ to minimize power losses. The B43656 series, rated at 450 V, handles even higher currents of up to 4.42 A at +105 °C for demanding high-power OBC topologies. 

Both series are qualified according to AEC-Q200 Rev. E and are made with RoHS-compliant materials. They are available in compact snap-in designs ranging in diameter from 22 mm to 35 mm and in length from 25 mm to 60 mm, depending on the capacitance and voltage class. The B43655 and B43656 capacitors provide design engineers with robust, future-ready solutions for on-board chargers in electric vehicles, thanks to their enhanced electrical performance and reliability.  

The new B43655 and B43656 series will also be implemented in TDK’s web-based AlCap Useful Life Calculation Tool. 

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