74270043

Overview

The Würth Elektronik 74270043 is a WE-AFB series axial ferrite bead designed for EMI suppression. It features a cylindrical core with an inner diameter of 7.3 mm, an outer diameter of 15.5 mm, and a length of 28.5 mm. The component utilizes 4W620 material to provide high impedance against common mode noise. Key electrical specifications include an impedance of 156 Ω at 25 MHz and 274 Ω at 100 MHz. It operates within a temperature range of -25°C to +105°C and complies with RoHS and REACH standards.

Feature Summary

• Provides effective electromagnetic interference suppression through high impedance characteristics
• Axial design allows direct integration onto cables without additional mounting hardware
• Constructed from specialized ferrite material optimized for broadband noise attenuation

Applications

• Suppression of common mode noise on power supply cables
• EMI reduction in computer data transmission lines
• Noise filtering for general electronic equipment wiring

Procurement Notes

Verify the specific impedance requirements against application frequency spectra before ordering. Confirm that the cable diameter falls within the 7.3 mm inner diameter tolerance. Ensure compliance with project-specific environmental regulations regarding RoHS and REACH directives. Cross-reference the manufacturer datasheet for precise thermal derating curves if operating near maximum temperature limits.

Selection Notes

Select this component when axial ferrite beads are required for cable-mounted noise suppression. Compare impedance values at relevant noise frequencies to ensure adequate attenuation. Consider the physical dimensions relative to available space on the cable assembly. Evaluate the material composition for compatibility with the operating temperature environment.

Part Context

This part belongs to the WE-AFB series of axial ferrite beads from Würth Elektronik. These components are distinct from snap-on rings or clip-on cores, offering a fixed geometry for permanent cable treatment. The series focuses on providing reliable EMI mitigation for various industrial and consumer electronics applications requiring robust noise filtering solutions.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. Verify compatibility with existing cable assemblies before attempting substitution.