28R1259-300

Overview

The Laird-Signal Integrity Products 28R1259-300 is a solid cable ferrite core designed for electromagnetic interference suppression. It utilizes Material 28, providing an impedance of 192 Ohms at 100 MHz. The component features a rectangular cross-section with an inner dimension of 1.094 inches wide by 0.059 inches high (27.80 mm x 1.50 mm) and an outer dimension of 1.260 inches wide by 0.305 inches high (32.00 mm x 7.75 mm). The total length is specified as 0.500 inches (12.70 mm). It is classified as a free-hanging type suitable for round or flat cables.

Feature Summary

• Solid construction utilizing Material 28 for effective high-frequency noise attenuation
• Rectangular geometry engineered to accommodate specific cable profiles
• Free-hanging installation design allowing flexible integration into wiring harnesses

Applications

• Electromagnetic compatibility filtering for electronic equipment cabling
• Signal integrity improvement on flat ribbon cables
• Suppression of radio frequency interference in data transmission lines

Procurement Notes

Verify the exact physical dimensions against the official datasheet before integration, as rectangular cores require precise clearance. Confirm that the target cable diameter fits within the 27.80 mm width and 1.50 mm height internal aperture. Ensure the application environment does not exceed the material's thermal limits. Cross-reference the part number with manufacturer documentation to confirm current production status and RoHS compliance details.

Selection Notes

Select this component when high impedance at 100 MHz is required for larger gauge or flat cables that cannot fit standard cylindrical cores. The rectangular shape offers a distinct advantage for securing flat ribbon cables compared to circular alternatives. Evaluate the mechanical stress on the cable during installation, as the solid design requires sufficient clearance for insertion. Compare impedance characteristics against other Material 28 variants to ensure optimal noise absorption for the specific frequency spectrum present in the system.

Part Context

This part belongs to the 28R series of cable ferrites from Laird-Signal Integrity Products. These components are specifically engineered for EMI suppression in industrial and commercial electronics. The series utilizes Material 28, known for its high permeability and loss characteristics in the VHF/UHF range. This specific model addresses the need for filtering on non-circular conductors where standard snap-on rings are unsuitable.

Replacement Considerations

Publicly confirmed substitute part numbers for the 28R1259-300 were not identified in the provided source materials.