742700726

Overview

The Wurth Elektronik 742700726 is a cylindrical ferrite core from the WE-SAFB series, designed for EMI suppression. It features an inner diameter of 4 mm and an outer diameter of 8 mm, with a total length of 30 mm. The component exhibits an impedance of 144 Ω at 25 MHz and 278 Ω at 100 MHz. Constructed as a small-size bead, it serves to attenuate high-frequency noise on cables.

Feature Summary

• Provides effective electromagnetic interference suppression through high impedance characteristics
• Compact cylindrical design suitable for space-constrained cable applications
• Engineered for efficient attenuation of common mode noise signals

Applications

• High-speed data line noise filtering
• Power supply cable EMI reduction
• USB and communication interface signal integrity enhancement

Procurement Notes

Verify the specific impedance profile against application requirements, noting the 144 Ω value at 25 MHz and 278 Ω at 100 MHz. Confirm that the 4 mm inner diameter accommodates the target cable gauge without mechanical stress. Ensure compliance with relevant environmental standards if required by the final product specifications.

Selection Notes

Select this part when a compact ferrite solution is needed for cables up to 4 mm in diameter. The WE-SAFB series offers higher impedance density compared to standard cores. Consider the operating frequency range where the 278 Ω impedance provides optimal noise attenuation for the specific signal lines involved.

Part Context

This component belongs to the WE-SAFB series, which focuses on small-size EMI suppression beads. It complements larger snap-on cores like the STAR-TEC series by offering a lower-profile alternative for smaller cables. The cylindrical shape allows for easy integration into tight spaces where bulkier clamp-on designs are unsuitable.

Replacement Considerations

No direct public substitute part numbers are confirmed for this specific model.