74279272

Overview

The Würth Elektronik 74279272 is a WE-CBF series SMD EMI suppression ferrite bead in an 0402 (1005 metric) package. It provides 300 Ohms impedance at 100 MHz with a maximum DC resistance of 0.8 Ohms and a rated DC current of 200 mA. The component operates within a temperature range of -55°C to +125°C and holds AEC-Q200 qualification for automotive reliability.

Feature Summary

• High-density surface mount design suitable for space-constrained PCB layouts
• Automotive-grade reliability certified under AEC-Q200 standards
• Effective high-speed electromagnetic interference attenuation

Applications

• Automotive electronic circuit protection
• High-speed data line filtering
• Portable device power rail noise suppression

Procurement Notes

Verify the specific suffix against official Wurth documentation to confirm exact electrical tolerances and packaging configurations. Confirm RoHS compliance status directly from the manufacturer datasheet prior to integration into regulated assemblies.

Selection Notes

Select this component when strict spatial limitations require an 0402 footprint alongside high-frequency noise suppression requirements. Ensure the 200 mA current rating aligns with the target circuit's operational load to prevent saturation or excessive thermal rise during continuous operation.

Part Context

This part belongs to the WE-CBF family of multi-layer ceramic ferrite beads manufactured by Würth Elektronik. These components are engineered specifically for broadband EMI suppression in compact electronic systems, offering consistent performance across wide frequency ranges while maintaining low insertion loss in signal paths.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Consult the manufacturer's RedExpert tool or official cross-reference lists for verified alternatives.