74270034

Overview

The Wurth Elektronik part number 74270034 is a WE-AFB series axial ferrite bead designed for electromagnetic interference suppression. It utilizes a cylindrical ferrite core material to provide impedance characteristics across specific frequency bands. Key electrical parameters include an impedance of 85 Ω at 25 MHz and 454 Ω at higher frequencies, as indicated by cross-referenced technical data. The component features a central bore diameter of 7.3 mm and an outer diameter of 12.1 mm, with an overall length of 15.5 mm. These physical dimensions allow it to accommodate cables or wires directly through its center, facilitating easy integration into wiring harnesses without requiring additional mounting hardware.

Feature Summary

• Provides high impedance for effective common-mode noise attenuation in signal and power lines
• Axial cylindrical design allows direct cable insertion for simplified assembly
• Engineered for broadband EMI suppression across defined frequency ranges

Applications

• Suppression of electromagnetic interference on microcontroller peripheral wiring
• Noise filtering in computer data transmission cables
• EMI reduction in general electronic equipment power supplies

Procurement Notes

Verify the exact impedance specifications against the official manufacturer datasheet before procurement, as axial ferrite beads often exhibit varying performance curves depending on the specific test conditions and cable types used. Ensure the selected part number matches the required bore size for your specific cable gauge. Confirm compliance with RoHS and REACH standards if required for your target market regulations. Cross-reference distributor listings with the manufacturer's official documentation to ensure authenticity and correct revision levels.

Selection Notes

Select this component when a snap-on or axial ferrite solution is preferred over clip-on types for permanent installations. The 7.3 mm bore size dictates the maximum cable diameter that can be accommodated. Consider the operating temperature range and the specific frequency spectrum of the noise being suppressed to ensure the 85 Ω @ 25 MHz characteristic aligns with the interference profile. Evaluate space constraints within the enclosure to ensure the 15.5 mm length fits the available routing path.

Part Context

This component belongs to the WE-AFB series from Wurth Elektronik, which specializes in axial ferrite beads for EMI suppression. Unlike split-core clamp-ons, these are solid cylindrical cores intended for cables installed prior to termination or for permanent wire management. The series offers various impedance values and dimensions to suit different cable diameters and noise frequencies, providing a robust solution for maintaining signal integrity in dense electronic assemblies.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided source data.