TDK aluminium electrolytic capacitors for DC links in OBCs

Designed specifically for DC links in on-board chargers (OBCs), both series are optimised for forced cooling operation, says the company. It highlights it supports the growing trend toward higher voltages and currents in next-generation OBC platforms.

They are available in compact snap-in designs ranging in diameter from 22 – 35mm and in length from 25 – 60mm. This is depending on the capacitance and voltage class.

TDK writes:

“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.”

Series qualification is based on the AEC-Q200 rev. E standard, and they are made with RoHS-compliant materials.

Note both the B43655 and B43656 series will be implemented in TDK’s web-based AlCap Useful Life Calculation Tool.

See also: NTC thermistor series for automotive power modules