Z21E

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Common Mode Chokes (CMC) are a form of electromagnetic interference (EMI) mitigation device that minimizes or eliminates the potential for stray electrical energy to be transferred to other circuits or components in a circuit that may not be designed to withstand the energy levels of the originating circuit. The term “common mode” is used to describe the type of energy that is transferred. The term “choke” is used to describe the physical characteristics of the device. CMC are widely used in a variety of applications including power amplifiers, switched-mode power supplies, motor drives, inverters, and other types of industrial and consumer electronics.

Z21E is a type of CMC, designed to provide strong EMI protection. Its main feature is a robust radiation suppression capability while maintaining an effective balance between common mode and differential mode EMI suppression performance. The Z21E is comprised of two spirally wound windings which are wound over a ferrite core. This winding arrangement works to provide both common mode and differential mode EMI suppression in one unit.

The Z21E is designed to minimize the effects of common mode currents that can be induced between two or more lines. Common mode currents are currents which travel on the same conductor in opposite directions causing the voltage potential to oscillate. These currents can contribute to the buildup of noise and may lead to malfunctioning of sensitive equipment. The Z21E is designed to reduce the effects of common mode currents without affecting the desired differential mode signals or interfering with the reflective or return loss measurement of the differential mode signals.

A further benefit of the Z21E is that it provides superior common mode EMI suppression while maintaining a low insertion loss. This helps to ensure that the EMI performance of the system remains uncompromised and provides considerable flexibility when designing the system for optimum EMI performance. The Z21E is also designed with a low DC and transient temperature coefficient, which is beneficial in systems subject to temperature and humidity changes.

The working principle of the Z21E is based on the principle of an inductor. The inductor creates a strong magnetic field when current passes through it. This strong magnetic field causes the current to experience a considerable amount of impedance. The Z21E works on this same principle, however, it combines the two windings to provide a stronger impedance to both common mode and differential mode signals. As the electromagnetic fields of the two windings overlap, they create a strong noise-reduction effect.

The Z21E has many applications in various industries. It is commonly used in automotive applications, consumer electronics, optical communication systems, broadcast systems, telecommunications systems, industrial automation, and medical device applications. It is an ideal solution for managing EMI concerns in these types of systems.

In conclusion, the Z21E is a powerful and efficient common mode choke which is designed to minimize the effects of common mode currents and reduce or eliminate the potential for the buildup of noise due to electromagnetic interference. Its robust radiation suppression capability, low insertion loss, and low temperature coefficient make it an ideal solution for any system requiring excellent EMI protection.

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