DFKF-18-0004

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Common mode chokes are an important component of electromagnetic interference (EMI) filters. The DFKF-18-0004 is a type of choke, also known as a common mode choke coil, that is used in the EMI filter system. It is designed to attenuate common mode currents, reduce radiated noise, and improve the EMI filter performance. In this article, we will discuss the application field and working principle of the DFKF-18-0004 common mode choke.

The DFKF-18-0004 is a flat and light common mode choke, designed to operate in a variety of applications. It is suitable for use in many different types of EMI filter circuits, including Class B and Class C filters, as well as for audio, RF, DC/DC, power electronics, and automotive applications. The common mode choke can also be used in AC/DC and DC/DC power supplies, as well as AC/DC and DC/DC DC/AC converters.

The DFKF-18-0004 is designed to operate in ranges of ambient temperatures as low as -30°C (or -22°F), and as high as 80°C (or 176°F). This makes it suitable for applications in a variety of operating temperatures and environments, such as in home or office appliances and even outdoor installations. It also has an IP67 ingress protection rating, meaning that it can be used in wet or dusty conditions.

The common mode choke works by absorbing the common mode currents from the circuits and helping to reduce the EMI emissions. In this way, it reduces the amount of noise and interference in the EMI filter system. The common mode choke also increases the amount of attenuation or rejection of EMI in the system, thus improving the performance. It is able to do this because it is designed to absorb and reject the common mode currents that cause the EMI.

The DFKF-18-0004 is designed to work in frequencies ranging from 10kHz to 100MHz. The common mode choke\'s operating frequency is dependent on its inductance, which is typically in the range of 1mH to 10mH. It also has an impedance of 2.4mohm at 10 kHz, which decreases with increasing frequency, thus providing an effective solution for reducing EMI at a wide range of frequencies.

The common mode choke has a high maximum current rating (4A) and is capable of handling high voltage transients. Its core-type construction also helps to reduce the inductance variation due to temperature. Additionally, it is equipped with a fireproof ABS sleeve that insulates the core, providing further safety in case of a short-circuit.

In summary, the DFKF-18-0004 common mode choke is an important component of EMI filters. It is designed to attenuate common mode currents and improve filter performance, and is suitable for a wide variety of applications. It has a wide operating frequency range, up to 100MHz, and a high maximum current rating, along with a fireproof ABS sleeve for added safety. Therefore, it is an effective and reliable solution for controlling EMI levels in many different applications.

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