B43655/B43656 Series Aluminum Electrolytic Capacitors

TDK Corporation B43655 and B43656 series aluminum electrolytic capacitors are designed specifically for DC links in onboard chargers (OBCs) in 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, these 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, achieves an even higher current-handling capability of 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/B43656 capacitors provide design engineers with robust, future-ready solutions for onboard chargers in electric vehicles, thanks to their enhanced electrical performance and reliability.

The B43655/B43656 series will also be implemented in the TDK web-based AlCap Useful Life Calculation Tool.