74279276

Overview

The Würth Elektronik 74279276 is a WE-CBF series surface-mount ferrite bead designed for signal line EMI suppression. It features a 0402 (1005 metric) package with one signal line. The component exhibits an impedance of 60 Ohms at 100 MHz and a maximum DC resistance of 350 milliohms. It supports a maximum current rating of 300mA and operates within a temperature range of -55°C to +125°C. The device meets AEC-Q200 automotive standards and is RoHS compliant.

Feature Summary

• Provides effective electromagnetic interference suppression for high-speed signal lines
• Features low DC resistance to minimize signal loss in power paths
• Automotive qualified to AEC-Q200 standards for reliability
• Compact surface-mount design facilitates automated PCB assembly

Applications

• Automotive electronic systems requiring AEC-Q200 compliance
• High-speed data interface noise filtering
• Portable device signal line protection
• General purpose EMI suppression on printed circuit boards

Procurement Notes

Verify the specific impedance tolerance and DC resistance values against the official datasheet before integration, as manufacturing batches may exhibit parameter variations. Confirm that the 0402 package dimensions align with the target PCB footprint. Ensure the selected supplier provides traceability documentation required for automotive or industrial quality management systems.

Selection Notes

Select this component when space constraints require a 0402 footprint for signal integrity management. Choose based on the 60 Ohm impedance requirement at 100 MHz for the target frequency spectrum. Verify that the 300mA current rating exceeds the maximum operating current of the protected line to prevent saturation. Consider the -55°C to +125°C temperature range for environmental compatibility.

Part Context

This part belongs to the WE-CBF family of SMD chip ferrites from Würth Elektronik. These components are engineered for direct placement on PCBs to offer anti-EMI properties with minimal profile. The series is characterized by stable performance across wide temperature ranges and is widely used in consumer electronics and automotive applications where size and efficiency are critical.

Replacement Considerations

The manufacturer recommends part number 7427927130 as a recommended alternative. Note that 7427927130 has a different impedance specification (30 Ohms @ 100 MHz) compared to the 74279276 (60 Ohms @ 100 MHz). Verify that the lower impedance value meets the circuit requirements before substitution.