28B0686-000

Overview

The Laird-Signal Integrity Products 28B0686-000 is a solid free-hanging ferrite core designed for electromagnetic interference suppression on cables. It exhibits an impedance of 91 Ohms at 100 MHz. The component features a cylindrical geometry with an inner diameter of 9.52 mm (0.375 inches) and an outer diameter of 17.42 mm (0.686 inches). Its physical length measures 6.35 mm (0.250 inches). This part is classified as a cable ferrite intended for direct installation onto wires without additional housing.

Feature Summary

• Solid cylindrical construction for robust mechanical integrity
• Free-hanging design allows direct sliding onto cables
• Provides broadband attenuation for high-frequency noise

Applications

• Suppression of common-mode noise on power cables
• EMI filtering for data transmission lines
• Cable assembly integration in electronic enclosures

Procurement Notes

Verify the specific impedance requirement matches the target noise frequency spectrum, as this unit provides 91 Ohms at 100 MHz. Confirm that the cable diameter falls within the 9.52 mm inner diameter tolerance to ensure a secure fit. Check RoHS compliance status if required by the end-product regulations. Ensure the solid core material is suitable for the operating temperature range of the application environment.

Selection Notes

Select this component when a non-shielded, solid ferrite solution is required for simple cable wrapping or sliding applications. It is appropriate for scenarios where space constraints prevent the use of larger clip-on cores but higher current capacity than chip beads is needed. Consider the 17.42 mm outer diameter for clearance planning within tight assemblies compared to smaller snap-on alternatives.

Part Context

This part belongs to the Laird Technologies signal integrity product line, specifically categorized under cable ferrites. It serves as a passive component for EMI/RFI mitigation. Unlike surface-mount chips, this is a through-hole style accessory for wire harnesses. It complements other shielding solutions by providing localized noise reduction directly at the source or exit point of a cable run.

Replacement Considerations

The 28B0686-100 is a related variant offering 139 Ohms impedance at 100 MHz with identical physical dimensions. Substitution requires verification that the increased impedance does not adversely affect signal integrity or power delivery in the specific circuit context.