74279250

Overview

The Würth Elektronik 74279250 is a surface-mount EMI suppression ferrite bead from the WE-CBF series, housed in an 1812 (4532 metric) package. It provides an impedance of 70 Ohms at a test frequency of 100 MHz and supports a maximum DC current of 300 mA. The component features a maximum DC resistance of 300 mOhms and operates within a temperature range of -55°C to +125°C. It is AEC-Q200 qualified for automotive applications.

Feature Summary

• Provides effective electromagnetic interference suppression for single signal lines
• Qualified for automotive reliability standards
• Designed for high-density surface mount assembly

Applications

• Automotive electronic circuits
• Signal line filtering
• EMI suppression in compact devices

Procurement Notes

Verify component status as this part number is listed as obsolete or discontinued by major distributors. Confirm availability of recommended substitutes such as 742792510 before finalizing procurement plans. Ensure all ordering documentation reflects the correct manufacturer designation and package type to avoid integration errors during sourcing.

Selection Notes

Select this component for applications requiring specific 70 Ohm impedance characteristics at 100 MHz in an 1812 footprint. Consider the 300 mA current rating and low DC resistance for power integrity. Verify that the operating temperature range meets system requirements and that automotive qualification is necessary for the target deployment environment.

Part Context

This ferrite bead belongs to the WE-CBF family of SMD EMI suppression components manufactured by Würth Elektronik. The series is designed for noise reduction in high-speed digital and RF circuits. The 1812 package offers a balance between performance and board space efficiency compared to smaller footprints.

Replacement Considerations

The manufacturer recommends part number 742792510 as a direct substitute. Verify pin compatibility and electrical specifications before substitution.