What standards apply to common mode chokes?

Common Mode Chokes are passive electronic components used to suppress high-frequency common mode noise in electronic circuits. These chokes are commonly used in power supply circuits, data communication systems, and other electronic applications where electromagnetic interference (EMI) needs to be reduced. To ensure the proper functioning and performance of common mode chokes, various standards and regulations are applicable.

One of the most widely recognized standards for common mode chokes is IEC 60938, which provides specifications and requirements for interference suppression filters and electromagnetic interference filters using capacitors and inductors. This standard outlines the construction, performance, and testing requirements for common mode chokes to meet the necessary levels of EMI suppression.

In addition to IEC 60938, other standards such as IEC 60950 (safety of information technology equipment) and IEC 61000 (electromagnetic compatibility) may also be relevant for common mode chokes. These standards define safety requirements and EMC compliance for electronic equipment, including common mode chokes used in these systems.

Regulatory bodies such as the Federal Communications Commission (FCC) in the United States and the European Union’s CE marking requirements also regulate the use of common mode chokes in electronic devices. These regulatory bodies set limits on the emissions of electromagnetic interference from electronic devices, requiring the use of common mode chokes to meet these emission standards.

When designing and selecting common mode chokes for electronic applications, engineers and designers must ensure that the chokes meet the relevant standards and regulations to ensure proper operation and compliance with industry requirements. This includes considerations such as the inductance value, current rating, and voltage ratings of the chokes, as well as the physical size and mounting requirements for integration into the electronic circuit.

Overall, common mode chokes play a crucial role in reducing EMI in electronic circuits, and adherence to applicable standards and regulations is essential to ensure the performance and reliability of these components in various electronic applications. By following the guidelines set forth by IEC, FCC, and other regulatory bodies, manufacturers and users can ensure the proper functioning of common mode chokes and compliance with industry standards.

In conclusion, standards such as IEC 60938, IEC 60950, and regulatory bodies such as the FCC and CE marking requirements are essential for ensuring the proper design, testing, and compliance of common mode chokes in electronic systems. Adherence to these standards and regulations is critical for maintaining the performance and reliability of common mode chokes in suppressing common mode noise and reducing electromagnetic interference in electronic circuits.