TDK Corporation presents a new generation of the EPCOS CeraLink™, a highly compact solution for the snubber and DC links of fast-switching converters based on SiC and GaN semiconductors. These new capacitors are based on the ceramic material PLZT (lead lanthanum zirconate titanate). In contrast to conventional ceramic capacitors, CeraLink has its maximum capacitance at the application voltage, and this even increases proportionately to the share of the ripple voltage.
The smallest version of the CeraLink is the SMD low profile variant with a capacitance of 1 µF at a rated voltage of 500 V DC. It has dimensions of 4.25 mm x 7.85 mm x 10.84 mm. A further type with solder pin contacts is also available. This 20µF capacitor has a rated voltage of 500 V DC and measures 33.00 mm x 22.00 mm x 11.50 mm. Both types offer extremely low ESL values below 3.5 nH. The capacitors are designed for an operating temperature of -40 to +125 °C and can even withstand brief exposures to 150 °C.
A great advantage of the SMD low-profile CeraLink versions is that they can even be embedded in IGBT modules thanks to their compact dimensions. This results in a very low-inductance design, so that no significant overvoltages are produced when the semiconductors are switched.
Two further types are available: an SMD variant with a capacitance of 5 µF at 500 V DC and measuring 13.25 mm x 14.26 mm x 9.35 mm. The second type, which is fitted with solder-pin contacts, has a capacitance of 5 µF of 1000 V DC and dimensions of 33.00 mm x 22.00 mm x 11.50 mm.
Main applications
Main features and benefits
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