28L0138-20R

Overview

The Laird-Signal Integrity Products 28L0138-20R is a single-line axial ferrite bead designed for electromagnetic interference (EMI) filtering. It exhibits an impedance of 97 Ohms at 100 MHz and supports a maximum rated current of 5A. The component features a low DC resistance of 10 milliohms, ensuring minimal signal loss in power lines. It utilizes an axial package with radial bent leads for through-hole mounting. The unit operates within a temperature range of -40°C to 125°C and measures 0.138 inches in diameter by 2.323 inches in length.

Feature Summary

• Provides effective high-frequency noise attenuation for power supply lines
• Supports high current handling capabilities suitable for robust power applications
• Features a compact axial form factor optimized for through-hole circuit board integration

Applications

• Power supply input filtering
• DC-DC converter output stages
• General EMI suppression in electronic equipment

Procurement Notes

Verify the specific impedance value and current rating against the latest official datasheet before implementation. Confirm that the axial package dimensions align with the target PCB footprint. Ensure the operating temperature range meets the environmental requirements of the final assembly. Check for any RoHS compliance updates or alternative lead-free options if required by regulatory standards.

Selection Notes

Select this component when a 97 Ohm impedance at 100 MHz is required for noise suppression. The 5A current rating makes it suitable for higher power circuits compared to lower-rated beads. Consider the axial package constraints regarding board space and lead bending requirements. Compare against similar series parts if different impedance values are needed for specific frequency targets.

Part Context

This part belongs to the Laird 28L0138 series of axial ferrite beads. The series offers various impedance values to address different filtering needs while maintaining consistent physical dimensions and current ratings. These components are widely used in industrial and consumer electronics for signal integrity management.

Replacement Considerations

Direct substitutes include other Laird 28L0138 variants with matching 5A ratings and axial packages. Verify impedance equivalence to ensure identical filtering performance. Cross-reference with other manufacturers offering comparable axial ferrite beads if Laird stock is unavailable.