4609H-701-820/101L

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Electromagnetic Interference (EMI) and Radio Frequency Interference (RFI) are two of the most common sources of noise in electrical systems. As a result, EMI/RFI filters are essential components in electronic systems and products that must operate in a noisy environment. Among the various EMI/RFI filters available, the 4609H-701-820/101L series of filters are specifically designed to provide high attenuation in the frequency range of 10MHz to 1000MHz.

The 4609H-701-820/101L is a two-pole, three-section LC (inductor and capacitor) filter designed to reduce high frequency noise and attenuate EMI/RFI generated by sources such as devices with high-speed clocks, switching regulators, motors, and other equipment. The 4609H-701-820/101L is typically used in applications where high attenuation of high frequency noise is required. Common applications include industrial control, telecom base station, medical equipment, automotive electronics, and military/aerospace systems.

The 4609H-701-820/101L filter consists of three inductors and two capacitors connected in series and then paralleled for higher current-handling capacity. The three inductors and two capacitors are arranged in a conventional LC (inductor-capacitor) filter topology. This topology allows for high attenuation over a wide frequency range and high power handling capabilities. The inductors are wound with an accuracy of ±10% to maximize noise attenuation and ensure performance over a wide range of conditions.

The working principle of the 4609H-701-820/101L filter is based on the fact that an LC circuit has two types of vibration modes - a high-frequency one and a low-frequency one. As the frequency rises, the high-frequency vibration mode dominates and the low-frequency vibration mode becomes insignificant. This in turn reduces the impedance of the LC circuit and thus reduces the amount of EMI/RF energy that is allowed to pass through the filter.

In addition to the LC filter, the 4609H-701-820/101L series of filters includes a series-parallel resistor-capacitor (RC) network. The RC network is placed at the input of the filter to provide additional filtering of high-frequency noise. This network provides a significant amount of attenuation of noise in the frequency range of 10MHz to 100MHz. Additionally, the RC network helps improve the attenuation of the LC filter by providing a low-impedance input to the filter. As a result, the filter is able to provide superior attenuation even over a wide frequency range.

The 4609H-701-820/101L series of filters provides superior attenuation of EMI/RF noise in the frequency range of 10MHz to 1000MHz. This makes it ideal for applications in which noise is a serious problem such as industrial control, telecom base station, and automotive electronics. Furthermore, the LC filter and RC network provide excellent attenuation over a wide frequency range and high power handling capabilities. As a result, the 4609H-701-820/101L series of filters is ideal for use in a variety of EMI/RFI applications.

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