4609H-701-101/221L

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EMI/RFI filters, such as 4609H-701-101/221L, are critical components that help protect products and systems from electromagnetic interference. As part of the power delivery chain, these filters help manufacturers achieve EMC compliance with global standards. In this case, 4609H-701-101/221L is a combination of an LC (L-C) filter and an RC (R-C) network that filters out high-frequency noise.

The 4609H-701-101/221L EMI/RFI filter is designed to filter out noise at high frequencies in the kHz to MHz range. This filter is often used in automotive applications where it must withstand temperatures up to 125°C. The filter provides up to 75 dB of isolation for frequencies up to 25 MHz.

The primary application for the 4609H-701-101/221L filter is in automotive power systems and similar environments where high-frequency noise is an issue. The filter is designed to protect automotive ECUs (Electronic Control Units) from interference from other electrical systems, such as the alternator. The filter has an especially low insertion loss, making it ideal for applications that require high data rates and low impedance levels.

The working principle of the 4609H-701-101/221L is based on two filter elements—an LC (L-C) network and an RC (R-C) network. Together, these two networks create a low-pass filter, meaning that the filter blocks out high-frequency noise while allowing the lower frequencies to pass through. The LC element is designed to eliminate high-frequency noise by increasing the impedance of the line towards the higher frequencies, and the RC network acts as an attenuator, reducing the amplitude of the signals.

The 4609H-701-101/221L filter is a highly effective EMI/RFI filter that is designed to protect automotive ECUs against interference from other electrical systems. The filter features two filter elements—an LC (L-C) network and an RC (R-C) network—which work together to create a low-pass filter that blocks out high-frequency noise while allowing lower frequencies to pass through. The filter is rated to operate up to 125°C degrees, and it provides up to 75 dB of isolation for frequencies up to 25 MHz.

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