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As electric vehicles with 800 V battery voltage are becoming more popular, these new components are obvious candidates because their optimal operating point is exactly at this voltage. While the existing 500 V CeraLink series is aimed at 400 V inverters equipped with gallium nitride (GaN) transistors or silicon MOSFETs, the new 900 V parts with a withstanding voltage of more than 1 kV are targeted at 800 V inverters equipped with silicon carbide (SiC) MOSFETs or silicon IGBTs.
The small 5.7 x 5.0 x 1.6 mm SMD capacitors have an effective capacitance of 33 nF, but at the operating voltage of 800 V, they achieve 56 nF in large-signal applications such as power converters and inverters. This positive DC bias is due to the PLZT (lead lanthanum zirconium titanate) ceramic dielectric, which behaves fundamentally differently from the Class II dielectrics in MLCCs with their negative DC bias effect.
This makes CeraLink capacitors a highly compact solution for snubbers, filters, flying capacitors, and DC-links, to name just a few functions, in power converters and inverters in automotive, renewable energy, and industrial drive applications. They are qualified to AEC-Q200 and their dissipation factor tan remains below 0.025.
Features & Applications
Main applications
• Fast-switching power converters and inverters for automotive, renewable energy, and industrial drive applications
Main features and benefits:
• Increasing capacitance with DC bias up to the rated voltage
• For wide bandgap semiconductors like SiC and GaN
• High ripple current capability
• No limitation in dV/dt
• Operating temperature: -40 to +150 °C
• Qualification based on AEC-Q200 Rev. E
About TDK Corporation
TDK Corporation (tdk.com) is a world leader in electronic solutions for the smart society based in Tokyo, Japan. Built on a foundation of material sciences mastery, TDK welcomes societal transformation by resolutely remaining at the forefront of technological evolution and deliberately “Attracting Tomorrow.” It was established in 1935 to commercialize ferrite, a key material in electronic and magnetic products. TDK‘s comprehensive, innovation-driven portfolio features passive components such as ceramic, aluminum electrolytic and film capacitors, as well as magnetics, high-frequency, and piezo and protection devices. The product spectrum also includes sensors and sensor systems such as temperature and pressure, magnetic, and MEMS sensors. In addition, TDK provides power supplies and energy devices, magnetic heads and more. These products are marketed under the product brands TDK, EPCOS, InvenSense, Micronas, Tronics and TDK-Lambda. TDK focuses on demanding markets in automotive, industrial and consumer electronics, and information and communication technology. The company has a network of design and manufacturing locations and sales offices in Asia, Europe, and in North and South America. In fiscal 2024, TDK posted total sales of USD 14.6 billion and employed about 101.000 people worldwide.
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