74270021

Overview

The Würth Elektronik 74270021 is a cylindrical solid ferrite bead from the WE-SAFB series, designed for electromagnetic interference suppression. It features a 3 mm inner diameter and an outer diameter of 5.65 mm, with a total length of 9.8 mm. The component utilizes NiZn core material to provide high impedance in compact spaces. Key electrical specifications include an impedance of 88 Ω at 100 MHz and 55 Ω at 25 MHz. It operates within a temperature range of -25°C to +125°C.

Feature Summary

• Compact cylindrical design suitable for space-constrained applications
• NiZn core material optimized for high-frequency noise attenuation
• Solid construction eliminates need for cable clamping mechanisms

Applications

• Radio frequency interference suppression
• Power management circuit filtering
• Industrial equipment EMI mitigation
• Consumer electronics signal integrity protection

Procurement Notes

Verify the specific impedance tolerance and material batch consistency against the manufacturer's datasheet before integration. Confirm that the 3 mm inner diameter accommodates the target conductor size without excessive friction during installation. Ensure the operating temperature range meets the environmental requirements of the final assembly location.

Selection Notes

Select this component when a low-profile, non-split ferrite solution is required for cables up to 3 mm in diameter. The 88 Ω impedance at 100 MHz makes it suitable for broadband noise suppression. Compare physical dimensions against available board or chassis space to ensure proper fitment alongside other components.

Part Context

This part belongs to the WE-SAFB (Small Size Ferrite Bead) family, which focuses on miniaturized EMI suppression solutions. Unlike split-core variants, these solid beads are installed by threading the cable through the center hole prior to final assembly. They complement larger snap-on cores by addressing noise issues in tighter geometries.

Replacement Considerations

No direct public substitute part numbers are confirmed for this specific model. When evaluating alternatives, match the 3 mm inner diameter, 88 Ω impedance at 100 MHz, and NiZn material composition to maintain equivalent performance characteristics.