74279271

Overview

The Würth Elektronik 74279271 is a WE-CBF series ferrite bead designed for signal line EMI suppression. It features a 0402 (1005 metric) surface-mount package with dimensions of 1.00mm x 0.50mm and a maximum height of 0.55mm. The component provides an impedance of 120 Ohms at 100 MHz and supports a rated DC current of 500 mA. It has a maximum DC resistance of 150 milliohms and operates within a temperature range of -55°C to +125°C. The device is AEC-Q200 qualified.

Feature Summary

• Provides effective electromagnetic interference suppression for high-speed signal lines
• AEC-Q200 qualified for automotive reliability standards
• Compact 0402 footprint suitable for space-constrained designs

Applications

• Automotive electronic systems requiring EMI filtering
• High-speed digital signal line protection
• Portable consumer electronics with limited board space

Procurement Notes

Verify the specific suffix against official datasheets to confirm impedance and current ratings, as variations exist within the WE-CBF family. Confirm RoHS compliance status and check for recent Product Change Notifications regarding manufacturing origin or material updates before finalizing procurement.

Selection Notes

Select this component when a compact 0402 ferrite bead is required for signal integrity management in automotive or industrial applications. Ensure the 500 mA current rating meets the circuit requirements and that the 120 Ohm impedance at 100 MHz aligns with the target noise frequency spectrum.

Part Context

This part belongs to the Würth Elektronik WE-CBF series, which specializes in small-size SMD ferrite beads. The series is engineered for EMI/RFI suppression in portable devices and automotive electronics, offering high impedance in minimal footprints while maintaining robust thermal and electrical performance.

Replacement Considerations

Public confirmed substitute: 74279276.