BLM18KN300EH1D

Chip Ferrite Bead Overview

The Murata BLM18KN300EH1D is a chip ferrite bead in the BLM18_K series, designed for power line noise suppression. It features a 0603 (1608 metric) SMD package with dimensions of 1.6 mm length, 0.8 mm width, and 0.6 mm height. The component provides an impedance of 30 Ohms at a test frequency of 100 MHz with a tolerance of 25%. It supports a maximum DC current of 2.6 A and has a maximum DC resistance of 10 mOhms. Operating temperatures range from -55°C to +175°C. It holds AEC-Q200 qualification for automotive applications.

Chip Ferrite Bead Feature Summary

• High current handling capability suitable for power line filtering
• Automotive grade reliability certified under AEC-Q200 standards
• Extended high-temperature operation up to 175°C
• Compact unshielded surface-mount design

Chip Ferrite Bead Applications

• Power supply input filtering in automotive electronics
• Noise suppression on high-current data lines
• EMI reduction in vehicle control units
• Filtering in industrial power modules

Chip Ferrite Bead Procurement Notes

Verify the specific suffix EH1D against official Murata documentation to confirm the 2.6A current rating and 175°C temperature limit, as these differ from standard BLM18 variants. Ensure the ordering part number matches the required impedance and package type exactly. Cross-reference the datasheet revision date to validate current specifications before procurement.

Chip Ferrite Bead Selection Notes

Select this component when high current capacity and elevated temperature tolerance are required in a 0603 footprint. The 30 Ohm impedance at 100 MHz targets specific noise frequencies. Compare the 10 mOhms DC resistance against voltage drop requirements in the circuit. Confirm compatibility with reflow soldering profiles specified for automotive-grade components.

Chip Ferrite Bead Part Context

This part belongs to the Murata BLM18_K series, which specializes in high-current ferrite beads. Unlike the BLM18_P or BLM18_H series, the K series is engineered for robust power line applications requiring higher current ratings and extended thermal performance. It shares the standard 0603 footprint but differs internally in material composition to support the 2.6A rating.

Chip Ferrite Bead Replacement Considerations

Direct substitutes within the same series include BLM18PG300SZ1D, though it has a lower 1A current rating and 125°C max temperature. For identical electrical characteristics, verify other BLM18_K series parts with matching 30 Ohm impedance and 2.6A rating. No direct cross-brand equivalents are confirmed in public documentation.