TDK Corporation has expanded its CeraLink capacitor series B58043 in the EIA 2220 footprint by adding two new 900 V types – one with standard termination (B58043I9563M052) and one with soft termination (B58043E9563M052).
As electric vehicles with 800 V battery voltage are becoming more popular, the company reports that these new components are suitable 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.
The company reports that this makes CeraLink capacitors a highly compact solution for snubbers, filters, flying capacitors, and DC-links, among other functions, in power converters and inverters in automotive, renewable energy, and industrial drive applications. They are qualified to AEC-Q200, and their dissipation factor tanẟ 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
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