BD5.1/0.8/10-4S2

Overview

The Ferroxcube BD5.1/0.8/10-4S2 is a cylindrical ferrite bead designed for electromagnetic interference suppression in electronic circuits. It utilizes material grade 4S2, which provides high saturation magnetic induction characteristics suitable for handling significant current levels without core saturation. The component features a through-hole construction with specific dimensional tolerances: an outer diameter of 5.1 mm, an inner diameter of 0.8 mm, and a length of 10 mm. At a frequency of 100 MHz, the part exhibits an impedance of 213 Ohms, ensuring effective attenuation of high-frequency noise signals while maintaining signal integrity in power lines.

Feature Summary

• High saturation magnetic induction capability allows operation under high current conditions without performance degradation
• Cylindrical bead geometry facilitates easy integration into existing wiring harnesses and PCB layouts
• Material composition optimized for broadband noise suppression across critical radio frequency ranges

Applications

• Power line filtering in switching mode power supplies
• Noise suppression on data cables connecting sensitive digital components
• EMI reduction in automotive electronic control units

Procurement Notes

Verify the exact material grade suffix (4S2) against the latest manufacturer datasheet to ensure compatibility with specific thermal and magnetic requirements. Confirm physical dimensions match the design footprint, particularly the inner diameter tolerance for wire insertion. Check for RoHS compliance status if operating in regulated markets. Ensure storage conditions prevent moisture absorption prior to soldering or assembly processes.

Selection Notes

Select this component when high current carrying capacity is required alongside effective high-frequency noise attenuation. The 4S2 material offers superior saturation limits compared to standard grades, making it ideal for applications where DC bias currents are substantial. Evaluate the impedance profile at the target noise frequency to confirm sufficient attenuation. Consider the mechanical robustness of the cylindrical form factor for vibration-prone environments.

Part Context

This ferrite bead belongs to the BD series of cylindrical beads from Ferroxcube, known for their reliability in industrial and consumer electronics. The BD5.1/0.8/10 designation indicates the specific size code, while the 4S2 suffix denotes the proprietary soft ferrite material formulation. This series is widely used for common-mode and differential-mode noise suppression in compact spaces where traditional chokes may be too large.

Replacement Considerations

Direct substitutes must match the 5.1mm outer diameter, 0.8mm inner diameter, and 10mm length constraints. Verify that alternative materials offer comparable saturation flux density and impedance characteristics at 100 MHz. Cross-reference with other manufacturers' cylindrical bead catalogs for equivalent electrical performance and mounting compatibility.