28B0686-100

Overview

The Laird-Signal Integrity Products 28B0686-100 is a solid round cylindrical ferrite cable core designed for electromagnetic interference suppression. It exhibits an impedance of 139 Ohms at a test frequency of 100 MHz. The component features a 9.52 mm inside diameter, accommodating cables within this clearance. External dimensions include a 17.42 mm outer diameter and a length of 12.7 mm. Constructed from material grade 28, it operates as a free-hanging core without integrated mounting hardware.

Feature Summary

• Solid construction provides structural integrity for free-hanging installation on cables.
• Cylindrical geometry ensures uniform magnetic path around the conductor.
• Material composition optimized for high-frequency noise attenuation.

Applications

• Suppression of common-mode noise on power supply lines
• Filtering radio frequency interference in data transmission cables
• EMI mitigation in industrial control wiring harnesses

Procurement Notes

Verify the manufacturer part number against official Laird documentation to ensure authenticity. Confirm that the required impedance matches the application's noise spectrum at 100 MHz. Check physical compatibility with the target cable diameter, specifically ensuring the 9.52 mm inner diameter fits the wire bundle securely. Validate RoHS compliance status if required by specific regulatory frameworks.

Selection Notes

Select this component when a solid, non-split ferrite core is required for permanent cable assembly. Ensure the operating environment does not exceed thermal limits defined in the datasheet. Consider the mechanical stability of free-hanging cores versus snap-on alternatives for vibration-prone applications. Verify that the 139 Ohm impedance profile aligns with the targeted interference frequencies.

Part Context

This component belongs to the 28B series of ferrite cable cores manufactured by Laird-Signal Integrity Products. The series utilizes specific ferrite formulations designated by numerical grades, such as material 28, to achieve consistent impedance characteristics across production batches. These cores are distinct from split-core designs, offering higher mechanical robustness for fixed installations.

FAQ

Is the 28B0686-100 a split-core design?

No, it is a solid round cylindrical core, requiring the cable to be threaded through during assembly.

What is the impedance value at the standard test frequency?

The impedance is 139 Ohms at 100 MHz.