4202-005

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EMI/RFI Filters, in the broader sense, refer to any device used to block unwanted electrical signals, allowing only those of desired frequencies to pass. The range of frequencies filtered by an EMI/RFI Filter can vary greatly depending on the filter design and application. One particular type of EMI/RFI Filter, the 4202-005, is designed to filter out unwanted signals from the 10kHz to 1000MHz range.

The 4202-005 EMI/RFI Filter is a LC (Inductor and Capacitor) network filter rated at 50V. It is designed for applications requiring effective and wideband shielding against EMI and RFI (Electromagnetic Interference and Radio Frequency Interference) such as ICs, DC/DC converters, power supplies, and signal processing equipment. It is a surface-mounted device with a pin count of 4 and terminals rated for temperatures up to 125 degrees Celsius.

The working principle of the 4202-005 is based on the same principles as other LC filters, using a combination of inductors and capacitors to achieve its filtering goals. In this case, the 4202-005 uses two inductors (L1 and L2) and two capacitors (C1 and C2) to achieve the desired frequency filtering. The capacitors are connected in parallel to form a short to ground, while the inductors are connected in series.

When an unwanted signal passes through the filter, the inductor blocks the signal, while the capacitor passes the signal to ground. This reduces the amount of the unwanted signal that reaches the sensitive equipment connected to the filter. In addition, the inductors and capacitors act like a low-pass filter, allowing only those signals with a frequency above the cutoff to pass through the filter. The cutoff frequency of the 4202-005 is adjustable by changing the resistance of the inductors, allowing the user to fine-tune the filter for a specific application.

Up to 4 channels can be connected to the 4202-005 in multiplexing arrangement, which further increases its filtering capabilities in a multiple channel system. The 4202-005 can also be used in conjunction with narrowband and wideband filters for even more effective signal filtering.

The 4202-005 EMI/RFI Filter is an ideal solution for those applications requiring efficient yet effective EMI and RFI shielding. Its combination of capacitors and inductors provide broad band filtering while allowing the user to adjust the filter cutoff frequency to the desired level. With 4 channels, the filter is easily scalable to handle multiple channel systems, making it a great option for a variety of industrial applications.

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