What is IEC 60623-2021?

IEC 60623-2021, also known as "Multilayer ceramic capacitors for use in electronic equipment - guideline for AC-DC conversion applications", is a technical standard that provides guidelines and specifications for the use of multilayer ceramic capacitors (MLCCs) in electronic equipment. This standard specifically focuses on the application of MLCCs in AC-DC conversion circuits. It was published by the International Electrotechnical Commission (IEC) to ensure the reliable and safe usage of MLCCs in various electronic devices.

Understanding Multilayer Ceramic Capacitors (MLCCs)

Multilayer ceramic capacitors (MLCCs) are electronic components widely used in different electronic devices for their excellent capacitance and stability. These capacitors are made up of alternating layers of ceramic material and metal electrodes. The ceramic dielectric material enables high capacitance values within a compact size. The metal electrodes provide electrical connections to the capacitor terminals.

MLCCs are available in various packages, sizes, and capacitance ratings. They find applications in power supplies, consumer electronics, automotive electronics, telecommunications, and many other industries. The performance of MLCCs greatly depends on factors such as temperature stability, voltage rating, capacitance value, and other electrical characteristics.

Importance of IEC 60623-2021 Compliance

Compliance with the guidelines in IEC 60623-2021 is crucial to ensure the proper functionality and reliability of electronic equipment, especially in AC-DC conversion circuits. These guidelines cover important parameters such as DC bias characteristics, temperature stability, and aging behavior of MLCCs. By adhering to these standards, manufacturers can design and produce electronic devices that meet safety and performance requirements.

One of the critical aspects addressed in IEC 60623-2021 is the derating of MLCCs under different voltage conditions. MLCCs may experience a reduction in capacitance when subjected to high DC bias voltages. The standard provides derating curves that assist designers in selecting appropriate capacitor values for their specific applications, considering the anticipated DC bias levels.

Conclusion

IEC 60623-2021 plays a vital role in ensuring the appropriate and reliable usage of multilayer ceramic capacitors (MLCCs) in AC-DC conversion circuits. Compliance with this technical standard allows manufacturers to produce electronic equipment that meets safety, efficiency, and performance criteria. By following the guidelines and specifications provided in IEC 60623-2021, engineers and designers can make informed decisions regarding the selection and implementation of MLCCs in various electronic devices, promoting the overall reliability and longevity of these products.