4253-002LF

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EMI/RFI Filters are key components used to reduce the radiation emitted from an electronic device. Their purpose is to filter out unwanted interference signals to prevent signal distortion, signal attenuation, and even system malfunction. The 4253-002LF is a EMI/RFI filter developed to meet the exacting requirements of the EMC and emissions testing. It is designed to inhibit both EMI and RFI signals emitted from a variety of electronic components.

Application Field

The 4253-002LF is designed for applications in both consumer and industrial electronic products. It is ideal for any application using radio frequency signals, such as communication systems, communications routers, and data links. Additionally, this filter can be used for automotive electronic systems, laptops, computer systems, and other electronic products.

Working Principle

The 4253-002LF is a common-mode EMI/RFI filter. This means that it works by filtering out both conducted and radiated interference signals. Through differential-mode circuit design, two filter networks are created that filter out harmonic distortions in the radio frequency signal. The filter contains multiple stages of high-Q filters consisting of inductors and capacitors that act as low-impedance paths for high frequency signals. The inductors act as switching capacitors to cut off the signal from the source voltage and reject the undesired harmonic noise.

For example, when a 4253-002LF filter is implemented on a computer system, it will block out common mode noise which is known to cause interference with communication systems. The filter will reduce the unwanted noise by reducing the load on the module, thus increasing the output power and signal integrity. The filter also contains a bleed resistor which works by dissipating energy when the capacitor is discharged, preventing the RF energy from re-entering the system.

Conclusion

The 4253-002LF is a reliable and robust EMI/RFI filter designed for industrial and consumer electronics applications. This filter is designed to inhibit both EMI and RFI signals emitted from a variety of electronic components. It is able to filter out harmful harmonic distortions in RF signals and also contains a bleed resistor which helps to reduce RF energy from re-entering the system. These features make the 4253-002LF a great choice for any system that requires EMI/RFI filtering.

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