TDK Corporation has introduced the B43655 and B43656 series of aluminum electrolytic capacitors, designed specifically for DC link applications in electric vehicle on-board chargers (OBCs). Both series support forced cooling, addressing the growing need for higher voltage and current in next-generation OBC systems.
Compact yet robust, these capacitors offer high ripple current capacity, making them ideal for space-constrained applications that demand efficiency and reliability.
The B43655 series provides high voltage options of 475 V and 500 V, with capacitances from 110 µF to 880 µF, suitable for modern 800 V battery architectures in e-mobility platforms. Optimized for base cooling, these capacitors handle high ripple current densities, feature a lifespan exceeding 3,000 hours at +105 °C, deliver up to 3.29 A ripple current at +105 °C, and maintain low ESR values down to 100 mΩ, reducing power losses.
The B43656 series, rated at 450 V, is capable of handling even higher ripple currents—up to 4.42 A at +105 °C—making it well-suited for demanding, high-power OBC designs.
Both the B43655 and B43656 series meet the AEC-Q200 Rev. E automotive qualification standard and are made from RoHS-compliant materials. They come in compact snap-in formats, with diameters between 22 mm and 35 mm and lengths from 25 mm to 60 mm, depending on voltage and capacitance. Safety is enhanced with pressure relief devices built into the case.
These series offer high energy density, reliability, and long-term performance for modern on-board charger applications. Certain models feature precise length tolerances of ±0.5 mm for design-critical installations. TDK has also integrated these capacitors into its online AlCap Useful Life Calculation Tool, allowing engineers to estimate and optimize their operational lifespan.
Key applications include electric vehicle on-board chargers, where their combination of high CV product, ultra-compact size, exceptional reliability, and high ripple current capacity make them ideal for base-cooled designs. These capacitors are tailored for engineers seeking efficient, high-performance solutions for next-generation EV systems.
