LI1812D121R-00

Chip Ferrite Bead Overview

The LI1812D121R-00 is a single-line ferrite bead manufactured by Laird-Signal Integrity Products. It features an 1812 (4532 Metric) surface-mount package with dimensions of 0.177 inches in length and 0.126 inches in width. The component provides an impedance of 120 Ohms at a test frequency of 100 MHz. It has a maximum DC resistance of 50 milliohms and supports a rated current of 1.5 Amperes. The device operates within a temperature range of -40°C to 125°C.

Chip Ferrite Bead Feature Summary

• Provides electromagnetic interference filtering for power and signal lines
• Designed for surface-mount installation on printed circuit boards
• Constructed as a solid core ferrite bead for high-frequency noise suppression

Chip Ferrite Bead Applications

• Power line filtering
• Signal line filtering

Chip Ferrite Bead Procurement Notes

Verify the specific suffix designation against official manufacturer documentation to confirm exact electrical tolerances and packaging configurations. Ensure that the selected variant matches the required current rating and impedance specifications for the target application circuit. Cross-reference the part number with authorized distributors to confirm availability status and compliance certifications prior to procurement.

Chip Ferrite Bead Selection Notes

Select this component based on its 1812 footprint compatibility and 1.5A current handling capability. Evaluate the 120 Ohm impedance characteristic at 100 MHz against the specific noise frequencies present in the design. Confirm that the low DC resistance meets voltage drop requirements for the power rail or signal path being filtered.

Chip Ferrite Bead Part Context

This ferrite bead belongs to the LI series from Laird-Signal Integrity Products, designed for EMI filtering applications. It serves as a passive component to suppress high-frequency noise in electronic circuits. The product is categorized under ferrite beads and chips, distinct from other filter types like common mode chokes or inductors.

Chip Ferrite Bead Replacement Considerations

Public confirmed substitute part numbers include MI1812K121R-10.