BLM18KN221EH1D

Chip Ferrite Bead Overview

The Murata BLM18KN221EH1D is a single-line ferrite bead in the EMIFIL BLM18KN series, packaged in a 0603 (1608 metric) surface-mount case. It provides an impedance of 220 Ohms at 100 MHz with a maximum DC resistance of 50 milliohms and a rated current of 1.4 Amperes. The component operates within a temperature range of -55°C to +125°C and meets AEC-Q200 automotive qualification standards.

Chip Ferrite Bead Feature Summary

• Designed to function as a resistor at noise frequencies to reduce resonance possibilities
• Automotive qualified under AEC-Q200 standards for reliability
• Single-line configuration for power line filtering applications

Chip Ferrite Bead Applications

• Power line noise filtering in automotive electronics
• EMI suppression in compact circuit boards
• High-current signal integrity management

Chip Ferrite Bead Procurement Notes

Verify the specific suffix EH1D against official Murata documentation to confirm package dimensions and tape/reel specifications. Ensure the selected variant matches the required 1.4A current rating and 220 Ohm impedance profile for the target application environment.

Chip Ferrite Bead Selection Notes

Select this component when a 0603 footprint is constrained but higher current handling than standard signal beads is required. The 1.4A rating supports power lines, while the 220 Ohm impedance targets specific frequency bands. Confirm thermal management capabilities align with the 125°C operating limit.

Chip Ferrite Bead Part Context

This part belongs to the Murata EMIFIL BLM18KN series, which focuses on high-current performance within small footprints. The BLM18KN series is distinct from the BD or KG variants by its optimized material composition for handling larger DC currents without saturation.

Chip Ferrite Bead Replacement Considerations

Direct substitutes include other BLM18KN series parts with matching 220 Ohm impedance and 1.4A ratings, such as BLM18KN221SH1D, provided the packaging suffix aligns with assembly requirements.