74279209

Overview

The Würth Elektronik 74279209 is a surface-mount EMI suppression ferrite bead from the WE-CBF series, housed in an 0805 (2012 metric) package. It provides an impedance of 1200 Ohms at a test frequency of 150 MHz and supports a maximum DC current of 200 mA. The component features a maximum DC resistance of 0.55 Ohms with a tolerance of ±25%. It operates within a temperature range of -55°C to +125°C and holds AEC-Q200 qualification for automotive reliability.

Feature Summary

• Provides high-impedance attenuation for electromagnetic interference suppression in high-speed signal lines
• Automotive-grade construction certified under AEC-Q200 standards for enhanced reliability
• Compact 0805 footprint designed for efficient space utilization on dense printed circuit boards

Applications

• High-speed data line filtering in automotive electronic control units
• EMI suppression for USB and other high-frequency interface circuits
• Signal integrity protection in compact mobile device architectures

Procurement Notes

Verify the specific impedance value against the official datasheet, as variations exist within the WE-CBF series. Confirm that the 200 mA current rating aligns with your circuit requirements. Ensure the 0805 package dimensions fit your board layout constraints. Check for RoHS compliance status if required by your manufacturing standards.

Selection Notes

Select this component when high attenuation is required at 150 MHz rather than lower frequencies. The 200 mA current limit suits low-power signal lines rather than power delivery paths. Consider the 0.55 Ohm DC resistance impact on signal voltage levels. The AEC-Q200 certification makes it suitable for automotive applications requiring strict reliability standards.

Part Context

This part belongs to the WE-CBF series of surface-mount ferrite beads manufactured by Würth Elektronik. The series focuses on EMI suppression for high-speed digital interfaces. The 0805 package size balances performance with board space efficiency. The product line includes various impedance values tailored for different frequency ranges.

Replacement Considerations

Cross-reference with other WE-CBF parts like 742792095 or 74279209 for similar form factors but different impedance characteristics. Verify that any substitute maintains the 0805 package dimensions and AEC-Q200 qualification if automotive use is intended.