28B1531-000

Overview

The Laird-Signal Integrity Products 28B1531-000 is a solid round cable ferrite core designed for electromagnetic interference suppression. It exhibits an impedance of 210 Ohms at 100 MHz. The component features an inside diameter of 12.95 mm (0.510 inches), an outside diameter of 38.86 mm (1.530 inches), and a length of 28.58 mm (1.125 inches). Classified under the 28B series, it utilizes material composition 28 for high-frequency noise attenuation.

Feature Summary

• Solid construction provides mechanical stability for free-hanging installation on cables.
• High impedance value of 210 Ohms at 100 MHz ensures effective broadband noise suppression.
• Large internal bore accommodates thick power or data cables up to 12.95 mm in diameter.

Applications

• Suppression of common-mode noise on industrial control cables
• EMI filtering for automotive wiring harnesses
• Noise reduction on high-current power supply lines

Procurement Notes

Verify the specific impedance tolerance and material grade against the official Laird datasheet before integration. Confirm that the cable diameter falls within the 12.95 mm inner diameter specification to ensure proper fit. Check for RoHS3 compliance requirements if operating in regulated markets. Ensure the solid design aligns with the assembly process, as these cores are not split-type and require cable access during installation.

Selection Notes

Select this part when high current capacity and robust mechanical protection are required alongside EMI filtering. The solid design offers superior durability compared to split cores but requires pre-existing cable ends for installation. Consider the 210 Ohm impedance profile for frequencies around 100 MHz. Evaluate the physical dimensions to ensure adequate clearance in the final enclosure. This component is suitable for applications where cable routing allows for sliding the core onto the wire prior to termination.

Part Context

This component belongs to the Laird 28B series of cable ferrites, which are engineered for signal integrity and EMI management. The series includes various sizes and impedance values tailored for different cable diameters and frequency ranges. The 28B1531-000 represents a larger format core, distinguishing itself from smaller surface-mount beads or thin-wire snap-on cores by its substantial mass and large aperture.

Replacement Considerations

Direct substitutes must match the 210 Ohm @ 100 MHz impedance, 12.95 mm ID, and solid construction. Verify equivalent material properties to maintain identical frequency response characteristics. Cross-reference with other manufacturers' large-bore solid ferrites ensuring dimensional compatibility.