74279221281

Overview

The Würth Elektronik 74279221281 is a WE-MPSB series high-speed EMI suppression ferrite bead in a 1206 (3216 metric) surface-mount package. It provides an impedance of 280 Ohms at 100 MHz and supports a maximum DC current of 3500 mA with a maximum DC resistance of 35 mOhms. The component operates within a temperature range of -55°C to +125°C and holds AEC-Q200 qualification for automotive reliability.

Feature Summary

• High-speed EMI suppression capability for signal lines
• AEC-Q200 qualified for automotive applications
• Compact 1206 surface-mount footprint

Applications

• Automotive electronics
• High-speed data line filtering
• Signal integrity protection

Procurement Notes

Verify the specific suffix against official Wurth documentation to confirm exact impedance, current rating, and packaging configuration. Ensure the selected variant matches the required AEC-Q200 qualification status if used in automotive contexts. Cross-reference datasheet parameters for thermal and electrical limits before integration.

Selection Notes

Select this component when high current handling up to 3500 mA is required alongside significant impedance at 100 MHz. The 1206 package offers a balance between current capacity and board space. Verify that the 35 mOhms DCR meets the voltage drop requirements of the target circuit design.

Part Context

This part belongs to the WE-MPSB series, designed specifically for high-current EMI suppression in compact spaces. It complements other Wurth ferrite solutions by offering AEC-Q200 certification, distinguishing it from standard industrial-grade beads while maintaining the performance characteristics expected in high-speed digital environments.

Replacement Considerations

Check for direct substitutes within the WE-MPSB family with matching 1206 dimensions and 280 Ohm @ 100 MHz specifications. Ensure any alternative maintains the 3500 mA current rating and AEC-Q200 qualification if automotive compliance is mandatory.