74276031

Overview

The Würth Elektronik 74276031 is an axial leaded ferrite bead designed for electromagnetic interference suppression. It belongs to the WE-WAFB series and provides a nominal impedance of 80 Ohms at a test frequency of 100 MHz. The component supports a maximum DC current of 3 A with a low DC resistance of 5 mOhms. It operates within a temperature range of -55°C to +125°C and features a tolerance of 25%. Physical dimensions are 4.5 mm in length and 3.5 mm in diameter.

Feature Summary

• Provides high-frequency noise attenuation through magnetic loss mechanisms
• Axial leaded construction facilitates through-hole mounting on printed circuit boards
• Capable of handling high continuous DC currents without saturation

Applications

• Suppression of common mode noise in power supply lines
• Filtering high-frequency interference in signal transmission paths
• EMI mitigation in automotive electronic modules

Procurement Notes

Verify the specific impedance value against design requirements, as datasheets may list variations such as 70 or 80 Ohms depending on the exact revision. Confirm that the axial package dimensions fit the target PCB layout. Ensure the operating temperature range meets the environmental conditions of the final assembly. Check RoHS compliance status if required by regulatory standards.

Selection Notes

Select this component when high current capacity is required alongside effective high-frequency filtering. The axial form factor is suitable for applications where surface mount space is limited or mechanical strain relief is needed. Compare the 80 Ohm impedance specification against alternative models like the 7427603 if lower impedance is acceptable. Evaluate the thermal performance under maximum load conditions.

Part Context

This part is part of the WE-WAFB series from Würth Elektronik, which specializes in passive components for EMI/RFI suppression. The series includes various ferrite beads optimized for different current ratings and impedance profiles. These components are widely used in industrial and automotive electronics to ensure electromagnetic compatibility.

Replacement Considerations

The 7427603 is a similar axial ferrite bead with 70 Ohms impedance at 100 MHz. Verify if the slight impedance difference affects circuit performance. Both parts share comparable current handling and physical dimensions.