742701121

Overview

The Würth Elektronik 742701121 is a WE-TOF series cylindrical EMI suppression ferrite core constructed from NiZn material. It provides broadband frequency attenuation for cable management. Key electrical parameters include an impedance of 370 Ω at 100 MHz and 76 Ω at 25 MHz. The component features a 5 mm inner diameter, 9.5 mm outer diameter, and 14.5 mm length.

Feature Summary

• Cylindrical snap-on design for rapid installation on cables
• NiZn material composition for effective broadband noise suppression
• High impedance characteristics in the 25 MHz to 100 MHz range

Applications

• Power supply cable filtering
• Data line EMI suppression
• General electronic equipment cable protection

Procurement Notes

Verify the specific impedance requirements against the datasheet curves for the target frequency spectrum. Confirm that the cable diameter falls within the 5 mm inner diameter tolerance. Ensure compliance with RoHS and REACH standards if required by the end application. Cross-reference the part number to distinguish it from similar WE-TOF variants with different dimensions or materials.

Selection Notes

Select this component when high attenuation is needed for smaller gauge cables. The 5 mm bore size limits usage to thinner wires compared to larger split cores. Consider the 370 Ω impedance at 100 MHz for high-frequency noise environments. Evaluate space constraints as the cylindrical shape requires linear cable routing rather than wrapping around bundles like toroidal rings.

Part Context

This component belongs to the WE-TOF family of EMI suppression ferrites. It utilizes Nickel-Zinc (NiZn) technology, which offers superior performance at higher frequencies compared to Manganese-Zinc alternatives. The cylindrical form factor allows for easy sliding onto existing cable assemblies without disconnecting connectors.

Replacement Considerations

Check Wurth Elektronik datasheets for other WE-TOF models with matching 5 mm inner diameters. Verify dimensional compatibility before substituting. Ensure the replacement maintains equivalent impedance profiles across the critical frequency bands.