BLM18KN121EH1D

Chip Ferrite Bead Overview

The Murata BLM18KN121EH1D is an automotive-grade ferrite bead in a 0603 (1608 metric) SMD package. It offers a nominal impedance of 120 Ohms at 100 MHz with a 25% tolerance. The component supports a maximum DC current of 1.9 A and has a maximum DC resistance of 30 mOhms. It operates within a temperature range of -55°C to +175°C and holds AEC-Q200 qualification.

Chip Ferrite Bead Feature Summary

• Designed to function nearly as a resistor at noise frequencies, reducing resonance possibilities and leaving signal waveforms undistorted
• Qualified for automotive applications under the AEC-Q200 standard
• Capable of effective noise suppression in power lines at elevated temperatures up to +175°C

Chip Ferrite Bead Applications

• Noise suppression in automotive power lines
• High-temperature electronic circuit filtering
• Signal integrity protection in automotive modules

Chip Ferrite Bead Procurement Notes

Verify the specific suffix EH1D against official Murata documentation to confirm the exact temperature rating and packaging configuration. Ensure the procurement channel provides valid traceability for AEC-Q200 qualified components intended for automotive use.

Chip Ferrite Bead Selection Notes

Select this component when high-temperature stability up to 175°C is required alongside moderate current handling of 1.9 A. The 0603 footprint suits space-constrained designs, while the resistive noise behavior minimizes waveform distortion compared to reactive filters.

Chip Ferrite Bead Part Context

This part belongs to the BLM18KN_EH series, which is specifically engineered for automotive environments. Unlike standard ferrites, this series prioritizes thermal resilience and stable impedance characteristics across extreme operating conditions.

Chip Ferrite Bead Replacement Considerations

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