74279252

Overview

The Würth Elektronik 74279252 is a single-line surface-mount ferrite bead designed for EMI suppression in power line applications. It features an 1812 (4532 metric) package with dimensions of 4.50mm length, 3.20mm width, and 1.70mm maximum height. The component provides an impedance of 880 Ohms at a test frequency of 100 MHz. It supports a maximum DC current rating of 4A and has a maximum DC resistance of 35 mOhms. The device operates within a temperature range of -55°C to +125°C and holds AEC-Q200 automotive qualification.

Feature Summary

• Provides effective electromagnetic interference suppression for single power lines
• Automotive-grade reliability certified under AEC-Q200 standards
• Capable of handling high continuous DC currents up to 4A
• Offers low DC resistance to minimize power loss in the circuit

Applications

• Power line filtering in automotive electronic systems
• EMI suppression for high-current DC power distribution
• Noise reduction in industrial control power supplies

Procurement Notes

Verify the specific impedance value of 880 Ohms at 100 MHz against design requirements. Confirm the 4A current rating and 35 mOhm DCR specifications match the target application's electrical constraints. Ensure the 1812 package footprint aligns with the PCB layout. Check for AEC-Q200 certification if automotive compliance is mandatory. Validate the operating temperature range covers the intended environmental conditions.

Selection Notes

Select this component when high current handling is required alongside significant noise attenuation. The 1812 package allows for robust soldering compared to smaller footprints. Consider the 880 Ohm impedance profile for the specific frequency spectrum of the noise being suppressed. The low DCR ensures minimal voltage drop across the component during normal operation.

Part Context

This part belongs to the WE-CBF series of ferrite beads from Würth Elektronik. The series focuses on providing reliable EMI suppression solutions for various electronic applications. Components in this family are characterized by their ability to handle substantial currents while maintaining effective filtering performance across defined frequency ranges.

Replacement Considerations

Direct substitutes must match the 1812 package, 880 Ohm impedance at 100 MHz, and 4A current rating. Verify that any alternative component meets the same AEC-Q200 automotive qualification and thermal specifications.