28R3149-000

Overview

The 28R3149-000 is a solid free-hanging ferrite core manufactured by Laird-Signal Integrity Products, designed for EMI suppression on flat or ribbon cable assemblies. It utilizes material grade 28 to provide an impedance of 135 Ohms at 100 MHz. The component features a rectangular geometry with an internal slot measuring 68.58 mm in length and 1.91 mm in height. External dimensions are 79.98 mm in length, 3.149 inches (80.0 mm) in width, and 0.472 inches (12.0 mm) in height. It is classified as a bulk package item suitable for manual installation.

Feature Summary

• Solid construction provides durable mechanical support for cable routing
• Rectangular slot design accommodates flat ribbon and flex cables
• Material 28 composition offers effective common mode noise attenuation

Applications

• EMI suppression on flat ribbon cable assemblies
• Noise reduction on flex cable interconnects
• Common mode filtering for data transmission lines

Procurement Notes

Verify the specific internal slot height of 1.91 mm against the target cable assembly thickness to ensure proper fit. Confirm that the required impedance level of 135 Ohms at 100 MHz aligns with the electromagnetic interference profile of the application. Check RoHS3 compliance status if restricted substances are prohibited in the manufacturing process.

Selection Notes

Select this component when dealing with flat or ribbon cables rather than round wires due to its rectangular cross-section. Ensure the cable bundle fits within the 1.91 mm internal height constraint. Consider the 135 Ohm impedance characteristic for high-frequency noise environments where standard circular cores may not provide adequate coverage or mechanical stability.

Part Context

This part belongs to the 28R series of cable ferrites from Laird-Signal Integrity Products. It serves as a passive filter component used to mitigate electromagnetic interference in electronic systems. The product is distinct from chip beads and cylindrical cores due to its specialized shape for flat cabling applications.

Replacement Considerations

Public confirmed substitute part numbers were not identified in the provided documentation.