ELF-18D650B

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Common Mode Chokes are one of the oldest and most commonly used types of magneto-resistive components, used for decoupling or suppression of common-mode noise in electronics. The ELF-18D650B, a common mode choke, is a perfect example of how these components can provide significant electromagnetic interference (EMI) suppression in telecommunications and power line applications, and in other types of interface cables.

The ELF-18D650B is designed to provide effective decoupling up to 9MHz, and as such works well in many home audio/video applications where signals up to this frequency are present. It is also designed to provide a noise reduction of -30 dB or better across the frequency range, and can handle currents up to 2A.

The ELF-18D650B choke consists of two wire coils of constant diameter wound around a ferrite core. As current flows through the two coils, the magnetic flux created creates a very strong field. This field is used to reduce the common-mode noise, which is any unwanted signal that is common to both the input and output of a circuit. This current flow must be in phase with the signal in order for the filtering to have the desired result.

The principle at work here is the same as that of any other type of noise suppression mechanism. When the unwanted noise is encountered, it causes a short-circuit across the coils. This creates an imbalance of currents flowing through the coils, and the associated magnetic field becomes stronger. This increase in magnetism acts to absorb the noise, making it much less visible.

The ELF-18D650B is designed to provide a very low DC resistance, allowing for a higher power signal to pass through without causing any short-circuit effects. Furthermore, it is designed with an insulation system that resists changes due to temperature, humidity, or EMI. This makes the ELF-18D650B the ideal component for any type of noise suppression application in telecommunications and power line applications.

The ELF-18D650B has many advantages over traditional common mode noise suppression components. Its low DC resistance and insulation design allows for a higher power signal to be passed through, while providing effective noise suppression. Additionally, it is designed to withstand extreme conditions, making it a robust and reliable addition to any noise suppression application.

Overall, the ELF-18D650B is an excellent choice when it comes to suppressive noise in a wide range of applications. Its insulation system makes it resistant to temperature, humidity, and EMI, while its low DC resistance allows for higher power signals to pass through. This makes it an ideal component for decoupling/suppressive noise in many home audio/video and some power line applications.

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