74279212

Overview

The Wurth Elektronik 74279212 is a WE-CBF series surface-mount EMI suppression ferrite bead designed for high-speed signal lines. It features an impedance of 150 Ohms at 100 MHz and a maximum DC current rating of 300 mA. The component exhibits a maximum DC resistance of 0.30 Ohms with a tolerance of 25%. It operates within a temperature range of -55°C to +125°C and meets AEC-Q200 automotive qualification standards. The physical dimensions are 3.2 mm in length, 1.6 mm in width, and 1.1 mm in height.

Feature Summary

• Provides effective electromagnetic interference suppression for high-speed digital circuits
• Automotive-grade reliability certified under AEC-Q200 standards
• Compact surface-mount design suitable for space-constrained PCB layouts

Applications

• High-speed data line filtering in automotive infotainment systems
• EMI suppression on USB and HDMI interfaces
• Signal integrity protection in mobile device power distribution networks

Procurement Notes

Verify the specific impedance value against the official datasheet, as distributor listings may vary between 150 Ohms and other values like 220 or 240 Ohms for similar part numbers. Confirm the AEC-Q200 certification status directly with the manufacturer documentation before integration into qualified automotive designs.

Selection Notes

Select this component when low DC resistance is critical to minimize voltage drop in sensitive signal paths. Ensure the operating current remains below the 300 mA limit to prevent saturation. The 1206 footprint allows for standard reflow soldering processes compatible with automated assembly lines.

Part Context

This ferrite bead belongs to the WE-CBF family from Wurth Elektronik, which specializes in shielded, multi-layer chip inductors and EMI filters. The series is engineered for robust performance in demanding environments, offering consistent attenuation characteristics across wide frequency bands while maintaining small form factors.

Replacement Considerations

Check for direct substitutes within the same WE-CBF series that match the 150 Ohm impedance and 300 mA current rating. Verify pin compatibility and thermal characteristics if replacing with components from other manufacturers.