LI0402D121R-10

Chip Ferrite Bead Overview

The LI0402D121R-10 is a single-line ferrite bead chip manufactured by Laird-Signal Integrity Products. Designed for surface mount installation, it operates within a temperature range of -40°C to 125°C. The component provides an impedance of 120 Ohms at 100 MHz and supports a maximum rated current of 400mA. It features a maximum DC resistance (DCR) of 400 milliohms and utilizes a 0402 (1005 Metric) package with dimensions of 1.00mm x 0.50mm.

Chip Ferrite Bead Feature Summary

• Provides broadband electromagnetic interference filtering for power and signal lines
• Supports high-current applications up to 400mA with low DC resistance
• Compact 0402 footprint suitable for dense surface mount layouts

Chip Ferrite Bead Applications

• Power supply line filtering in portable electronics
• Signal integrity management in high-speed digital circuits
• EMI suppression in compact consumer devices

Chip Ferrite Bead Procurement Notes

Verify the manufacturer part number LI0402D121R-10 against official Laird datasheets to confirm specifications. Ensure compatibility with RoHS3 standards if required by your design. Check for authorized distribution channels to guarantee component authenticity and traceability. Confirm package type and pin configuration match your PCB layout requirements before procurement.

Chip Ferrite Bead Selection Notes

Select this component when space constraints require a 0402 package size while maintaining 400mA current handling capability. The 120 Ohm impedance at 100 MHz makes it suitable for mid-frequency noise suppression. Consider the 400 milliohm DCR for minimal voltage drop in power paths. Evaluate thermal performance within the -40°C to 125°C operating range for your specific environment.

Chip Ferrite Bead Part Context

This ferrite bead belongs to Laird's MI series of signal integrity products. It is designed for EMI filtering in compact electronic assemblies. The component complements other Laird passive filters by offering a balance of current capacity and noise attenuation in a standard surface mount form factor.

Chip Ferrite Bead Replacement Considerations

Direct substitutes may include other 0402 ferrite beads with similar 120 Ohm impedance and 400mA ratings from Laird or alternative manufacturers. Verify impedance curves and current saturation characteristics closely. Cross-reference package dimensions and terminal configurations to ensure mechanical fit.