MI0402K121R-10

Overview

The MI0402K121R-10 is a single-line ferrite bead manufactured by Laird-Signal Integrity Products, designed for surface mount assembly in the compact 0402 (1005 Metric) package. It provides an impedance of 120 Ohms at 100 MHz with a maximum DC resistance of 130 mOhm and a rated current capacity of 2A. The component operates within a temperature range of -40°C to 125°C and is RoHS3 compliant.

Feature Summary

• Provides effective electromagnetic interference filtering for power and signal lines
• Compact surface mount footprint suitable for high-density circuit board layouts
• Capable of handling high continuous current loads without saturation

Applications

• Power line noise suppression in portable electronic devices
• Signal integrity enhancement on high-speed data buses
• EMI mitigation in compact consumer electronics assemblies

Procurement Notes

Verify the specific suffix designation during procurement to ensure compliance with environmental regulations, as suffixes may indicate RoHS status variations. Confirm that the selected packaging format aligns with automated placement equipment requirements. Cross-reference the manufacturer part number against official distributor catalogs to validate authenticity and current production status before finalizing orders.

Selection Notes

Select this component when space constraints necessitate a 0402 package while requiring a 2A current rating. Ensure the target application frequency aligns with the 120 Ohm impedance specification measured at 100 MHz. Verify that the low DC resistance meets voltage drop limitations for the specific power rail being filtered.

Part Context

This ferrite bead belongs to the MI series from Laird-Signal Integrity Products, which focuses on EMI filtering solutions. The series offers various impedance values and current ratings across multiple standard package sizes to support diverse design requirements in modern electronic systems.

Replacement Considerations

Direct replacements include the MI0603M121R-10 for larger footprints. Alternative sources such as Murata's BLM18EG121SN1D are listed as similar components for obsolescence management.