CME375-5

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Common Mode Chokes

Common mode chokes, such as the CME375-5, are used to prevent the transmission of unwanted electrical or electromagnetic interference (EMI) through balanced power line applications. Common mode noise can be caused by a wide variety of electrical sources, ranging from the signals of radio and television broadcasts to the low-frequency interference generated by other electrical devices. Common mode chokes help to shield a system from these sources of interference by blocking the transfer of the unwanted noise.

CME375-5 Application Field and Working Principle

The CME375-5 application is mainly used for the filtering of two-wire balanced AC power line. It consists of an impedance element (typically an inductor) and a capacitor. The inductor acts to reduce the AC transference impedance of the line and reduce the common-mode current. The capacitor works to filter out high frequency noise, allowing only the desired signals to pass through. This combination of components, along with the design of the common mode choke, creates a noise filter that provides effective EMI protection.

The CME375-5 has an inductance rating of around 37.5uH. This allows for a low impedance across the frequency range, which helps to attenuate common-mode noise. Furthermore, the choke will have an increased impedance at high frequencies to block out the higher frequency, EMI noise. The CME375-5 can also be used in combination with other filtering components such as capacitors and resistors to further improve its filtering capabilities.

The CME375-5 is able to operate at a maximum rated current of 4A, with an average operating temperature of around 120°C. This makes it ideal for use in applications, such as AC switchmode power supplies, where high-power current handling is required. This also makes it suitable for applications that involve radio and television broadcast signals, as well as industrial or automotive circuit noise.

The CME375-5 is also a suitable filter for other applications that require noise and EMI attenuation. Examples of applications include electro-optical devices, audio amplifiers, and medical equipment. It can be used in both single-phase and three-phase systems as an effective barrier for the reduction of common-mode and differential-mode noise.

The CME375-5 is a useful filter for reducing unwanted noise in applications such as AC switchmode power supplies and other power-supply related noise sources. Its low inductance rating allows for a low impedance across the frequency range, which helps to attenuate common-mode noise while providing high impedance for attenuation of higher frequency EMI noise. The CME375-5 can also be used in combination with other components such as capacitors and resistors to further improve its filtering capabilities. Furthermore, its high-power current handling capacity, wide temperature range, and suitability for different types of applications make it a valuable addition to any noise-reducing system.

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