28B0686-200

Overview

The 28B0686-200 is a solid cylindrical ferrite core manufactured by Laird-Signal Integrity Products, designed for broadband EMI suppression. It exhibits an impedance of 242 Ohms at 100 MHz and utilizes Material 28. The component features a free-hanging installation type with an inner diameter of 9.53 mm (0.375 inches), an outer diameter of 17.42 mm (0.686 inches), and a length of 28.58 mm (1.125 inches). It is RoHS3 compliant and classified under ECCN EAR99.

Feature Summary

• Provides effective reduction of common and differential mode electromagnetic interference through broadband filtering capabilities.
• Constructed from Material 28 to ensure consistent performance across a wide frequency range.
• Features a solid cylindrical design that allows for easy sliding onto cables without requiring complex mounting hardware.

Applications

• Suppression of unintended signals on or being emitted from cables and wires
• Common mode filtering in electronic assemblies
• Broadband EMI mitigation for signal and power lines

Procurement Notes

Verify the specific material grade and impedance characteristics against the official Laird datasheet to ensure compatibility with target noise frequencies. Confirm that the cable diameter falls within the 9.53 mm inner diameter specification. Check for RoHS3 compliance requirements if operating in regulated regions. Ensure the solid construction meets mechanical clearance constraints in the final assembly.

Selection Notes

Select this component when broadband attenuation is required for cables passing through a 9.53 mm aperture. Material 28 offers high permeability suitable for general-purpose EMI suppression. Compare the 242 Ohm impedance at 100 MHz against the noise spectrum of the application. Consider the physical dimensions (17.42 mm OD, 28.58 mm length) for spatial integration. Evaluate alternative materials if specific frequency targeting differs significantly from the standard broadband profile.

Part Context

This part belongs to the 28B series of cable ferrites from Laird-Signal Integrity Products. These cores are engineered for versatile EMI control in various electronic environments. The series includes multiple sizes and impedances to accommodate different cable diameters and noise profiles. The 28B0686-200 represents a medium-sized option balancing aperture size with attenuation capability.

Replacement Considerations

Direct substitutes must match the 9.53 mm inner diameter and similar impedance characteristics. Other Laird 28B series cores may serve as alternatives if dimensional constraints allow. Verify that any replacement maintains Material 28 composition for equivalent frequency response. Cross-reference with other manufacturers' broadband ferrite cores ensuring identical physical and electrical parameters.