LI1812D121R-10

Chip Ferrite Bead Overview

The LI1812D121R-10 is a monolithic differential mode ferrite chip bead manufactured by Laird-Signal Integrity Products. It features an 1812 (4532 metric) surface-mount package with dimensions of 4.5 mm length, 3.2 mm width, and 1.6 mm height. The component provides an impedance of 120 Ohms at a test frequency of 100 MHz. It supports a maximum DC current of 400 mA and has a maximum DC resistance of 400 mOhms. The device operates within a temperature range of -40°C to +125°C.

Chip Ferrite Bead Feature Summary

• Monolithic construction for reliable signal integrity in compact designs
• Differential mode filtering capability for power and signal lines
• Surface-mount termination compatible with automated assembly processes

Chip Ferrite Bead Applications

• Power line EMI suppression
• Signal line noise filtering
• High-frequency circuit protection

Chip Ferrite Bead Procurement Notes

Verify the specific suffix 'R-10' against official datasheets to confirm reel packaging specifications. Ensure the manufacturer designation matches Laird-Signal Integrity Products to avoid confusion with similar part numbers from other vendors. Confirm RoHS compliance status through the latest documentation before integration.

Chip Ferrite Bead Selection Notes

Select this component when a 1812 footprint is required for differential mode filtering. The 400 mA current rating suits low-to-medium power applications. Compare the 400 mOhm DCR against system voltage drop requirements. Ensure the 120 Ohm impedance at 100 MHz aligns with the target noise spectrum.

Chip Ferrite Bead Part Context

This part belongs to the LI series of ferrite beads from Laird-Signal Integrity Products. It is designed for surface-mount technology applications requiring compact EMI suppression solutions. The 1812 case size offers a balance between current handling capacity and board space efficiency compared to smaller packages.

Chip Ferrite Bead Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material.