74279204

Overview

The Würth Elektronik WE-CBF 74279204 is a surface-mount ferrite chip bead designed for electromagnetic interference suppression. It features an 0805 (2012 metric) package with dimensions of 2.0 mm length, 1.2 mm width, and 0.9 mm height. The component provides an impedance of 600 Ohms at a test frequency of 100 MHz and supports a maximum DC current of 200 mA. It has a maximum DC resistance of 600 mOhms and operates within a temperature range of -55°C to +125°C. The device is AEC-Q200 qualified.

Feature Summary

• Provides high impedance for effective electromagnetic interference suppression in compact designs
• AEC-Q200 qualified for automotive reliability standards
• Capable of handling rated DC currents while maintaining low DC resistance

Applications

• Automotive electronic circuits requiring EMI filtering
• Signal line noise suppression in consumer electronics
• Power supply output filtering for sensitive components

Procurement Notes

Verify the specific impedance value and current rating against the official datasheet before procurement, as suffixes define unique electrical characteristics. Confirm the package type matches the target PCB footprint. Ensure the supplier provides documentation confirming AEC-Q200 qualification if the application requires automotive-grade compliance. Check for any recent product change notices that might affect availability or specifications.

Selection Notes

Select this component when a small form factor is required for high-frequency noise attenuation. The 0805 size balances board space constraints with sufficient current handling capabilities for many signal lines. Consider the 600 Ohm impedance profile for the specific frequency range of the noise being suppressed. Verify that the 200 mA current rating exceeds the maximum operating current of the protected circuit to prevent saturation.

Part Context

This part belongs to the WE-CBF series of ferrite beads from Würth Elektronik. The series offers various impedance and current ratings in standard SMD packages. These components are engineered for general-purpose EMI suppression in both commercial and automotive applications. The WE-CBF line emphasizes consistency in performance across different package sizes.

Replacement Considerations

Publicly confirmed substitute part numbers for 74279204 were not identified in the provided source material. Consult manufacturer cross-reference tools for potential alternatives.