74278043

Overview

The Würth Elektronik 74278043 is a WE-FLAT ferrite core designed for flexible printed circuit boards. It features a flat geometry to accommodate PCB traces and cables. The component utilizes 4W620 material composition. Key impedance specifications include 150 Ω at 25 MHz and 270 Ω at 100 MHz. The internal diameter measures 4.5 mm, with external dimensions of 19.5 mm width, 10.5 mm height, and 1.5 mm depth.

Feature Summary

• Flat profile optimized for integration with flexible printed circuit board traces
• Utilizes 4W620 ferrite material for effective electromagnetic interference suppression
• Designed for easy installation on cables and PCB connections

Applications

• Electromagnetic interference suppression in general electronic equipment
• Noise filtering on flexible printed circuit board traces
• Cable protection in consumer electronics

Procurement Notes

Verify the specific part number against official Wurth Elektronik documentation to confirm compatibility with target applications. Ensure that the selected ferrite core meets the required impedance characteristics for the intended frequency range. Confirm compliance with relevant environmental standards such as RoHS and REACH before finalizing procurement decisions.

Selection Notes

Select this component based on the required internal diameter to fit the specific cable or trace thickness. Evaluate the impedance values at operating frequencies to ensure adequate noise attenuation. Consider the physical constraints of the flexible PCB layout to determine if the flat form factor provides sufficient space for installation without interfering with adjacent components.

Part Context

This component belongs to the WE-FLAT series of ferrite cores from Würth Elektronik. These cores are specifically engineered for applications involving flexible circuits where standard round cores cannot be effectively applied. The series offers various sizes to accommodate different cable diameters while maintaining consistent material properties for reliable EMI performance.

Replacement Considerations

Consult official Wurth Elektronik substitution guides for verified alternative part numbers. Cross-reference internal diameter and impedance specifications when evaluating potential substitutes to maintain circuit integrity.