74270077

Overview

The Würth Elektronik part number 74270077 is a cylindrical ferrite core belonging to the WE-AFB series, designed for EMI suppression on cables. It features an inner diameter of 6.35 mm and an outer diameter of 14.2 mm, with a total length of 28.5 mm. The component provides an impedance of 154 Ω at 25 MHz and 278 Ω at 100 MHz. Constructed from high-performance ferrite material, it operates within a temperature range of -40°C to +85°C. The unit is RoHS compliant and lead-free, ensuring adherence to environmental standards for electronic assemblies.

Feature Summary

• Cylindrical axial ferrite bead design for direct cable integration
• High impedance performance across standard EMI frequency ranges
• RoHS compliant and lead-free construction for environmental safety

Applications

• EMI suppression on power supply cables
• Noise filtering on data transmission lines
• Common mode noise reduction in electronic equipment

Procurement Notes

Verify the specific impedance requirements against application frequencies before ordering. Confirm that the cable outer diameter fits within the 6.35 mm inner diameter specification. Ensure compliance with RoHS directives if required by the end product regulations. Check for any specific packaging or handling instructions provided by the manufacturer.

Selection Notes

Select this component when a fixed cylindrical ferrite solution is preferred over snap-on cores for permanent cable treatment. Consider the 154 Ω impedance at 25 MHz as a key metric for low-frequency noise attenuation. Evaluate the physical dimensions to ensure adequate space on the cable assembly. Compare against other WE-AFB variants if different impedance profiles are needed.

Part Context

This component is part of the WE-AFB series from Würth Elektronik, specialized for axial ferrite beads used in EMI suppression applications. The series offers various sizes and impedance values to suit different cable diameters and noise frequencies. It serves as a passive component to enhance electromagnetic compatibility in sensitive electronic systems without active circuitry.

Replacement Considerations

No public confirmed substitute part numbers are available in the source data.