742700781

Overview

The Wurth Elektronik 742700781 is a WE-AFB series EMI suppression axial ferrite bead designed for cable noise reduction. It features an inner diameter of 8.2 mm and an outer diameter of 14.2 mm, with a total length of 28.5 mm. The component provides an impedance of 120 Ω at 25 MHz and 220 Ω at 100 MHz, measured with one turn. Tolerance is specified as ±25% at 25 MHz, while values at 100 MHz are typical.

Feature Summary

• Provides effective electromagnetic interference suppression for axial cable applications
• Designed for direct installation around cables without additional mounting hardware
• Constructed from materials compliant with REACH and RoHS standards

Applications

• General EMI noise filtering on power and signal cables
• Safety-related application environments requiring certified components
• Cable assemblies needing compact axial ferrite solutions

Procurement Notes

Verify the specific impedance tolerance requirements against the datasheet specifications before ordering. Confirm that the cable diameter falls within the 8.2 mm inner diameter limit to ensure proper fit. Check for updated compliance documentation such as REACH and RoHS status directly from the manufacturer's official channels prior to final procurement decisions.

Selection Notes

Select this component when axial ferrite beads are required for cables up to 8.2 mm in diameter. Consider the 120 Ω impedance at 25 MHz for lower frequency noise suppression needs. Ensure the operating environment does not exceed standard temperature ratings associated with this material composition. Compare physical dimensions against available space constraints in the assembly design.

Part Context

This part belongs to the WE-AFB series of axial ferrite beads manufactured by Wurth Elektronik. These components are distinct from snap-on cores or clamp-on rings, offering a fixed cylindrical geometry optimized for permanent attachment to wires. The series focuses on providing standardized impedance characteristics for common EMI suppression tasks in electronic equipment.

Replacement Considerations

Public confirmed substitute part numbers were not identified in the provided source data.