28L0138-40R

Overview

The Laird-Signal Integrity Products 28L0138-40R is a single-line axial ferrite bead designed for EMI filtering. It exhibits an impedance of 135 Ohms at 100 MHz and supports a maximum rated current of 5A. The component features a low DC resistance (DCR) of 10 milliohms, ensuring minimal signal loss in power or signal lines. It utilizes a through-hole mounting method within an axial package measuring 0.138 inches in diameter and 2.323 inches in length. The device operates reliably across a temperature range of -40°C to 125°C.

Feature Summary

• Provides effective electromagnetic interference suppression with high impedance characteristics at 100 MHz.
• Supports high-current applications up to 5A with minimal resistive voltage drop.
• Designed for robust through-hole integration into circuit boards.

Applications

• Power supply line filtering
• Signal line noise suppression
• General EMI/RFI mitigation in electronic assemblies

Procurement Notes

Verify the specific suffix requirements when ordering, as variants such as 28L0138-40R-10 exist with different packaging options like tape and reel or cut tape. Confirm that the axial lead configuration matches your board layout constraints. Ensure compatibility with the required current rating and impedance specifications for your specific frequency domain application before finalizing procurement.

Selection Notes

Select this component when a through-hole solution is required for high-current paths needing significant attenuation at 100 MHz. The 5A rating makes it suitable for main power rails, while the 135 Ohm impedance targets specific noise frequencies. Consider the physical dimensions of the axial leads during PCB footprint design to ensure adequate clearance and mechanical stability.

Part Context

This part belongs to the Laird 28 series of ferrite beads, which are engineered for signal integrity and EMI control. The manufacturer specializes in signal integrity products, providing components that help maintain clean power and data transmission in complex electronic environments. This specific model represents a standard axial form factor widely used in industrial and commercial electronics.

Replacement Considerations

Direct substitutes include the 28L0138-50R-10. Verify that alternative parts match the 135 Ohm impedance at 100 MHz and the 5A current rating to ensure functional equivalence without compromising circuit performance or thermal management.

FAQ

What is the impedance value of the 28L0138-40R at 100 MHz?

The impedance is 135 Ohms at 100 MHz.

Is this component suitable for high-current applications?

Yes, it has a maximum rated current of 5A, making it appropriate for high-current power lines.