BLM18KN101EH1D

Chip Ferrite Bead Overview

The Murata BLM18KN101EH1D is an automotive-grade ferrite chip bead designed for noise suppression in power lines. It features a 0603 (1608 metric) surface-mount package with dimensions of 1.6 mm length, 0.8 mm width, and 0.75 mm height. The component provides an impedance of 100 Ohms at 100 MHz with a tolerance of 25%. It supports a maximum DC current of 1.9 A and has a maximum DC resistance of 30 mOhms. Operating temperatures range from -55°C to +175°C. It holds AEC-Q200 qualification.

Chip Ferrite Bead Feature Summary

• High-temperature stability up to +175°C for demanding automotive environments
• AEC-Q200 qualified reliability for automotive power line applications
• Compact 0603 footprint suitable for space-constrained PCB layouts

Chip Ferrite Bead Applications

• Automotive power line noise suppression
• High-temperature electronic circuit filtering
• Automotive ECU power input protection

Chip Ferrite Bead Procurement Notes

Verify the specific suffix EH1D confirms the extended temperature rating of +175°C, as standard variants may differ. Confirm AEC-Q200 compliance requirements match your design specifications. Check RoHS3 status for regulatory adherence. Ensure the 0603 package dimensions align with your PCB footprint library. Validate the 1.9A current rating against your circuit's peak load requirements before finalizing procurement.

Chip Ferrite Bead Selection Notes

Select this component when high-temperature operation exceeding standard limits is required. The 100 Ohm impedance at 100 MHz targets specific noise frequencies in power lines. The 0603 size offers a balance between current handling and board space. Consider the 30 mOhm DCR for voltage drop calculations. Ensure the 1.9A rating covers maximum operational currents without saturation.

Chip Ferrite Bead Part Context

This part belongs to the Murata BLM18_H series of EMIFIL ferrite beads. The series includes various impedance values and temperature ratings. The KN variant specifically denotes the high-temperature capability. Other series members like KG or KN may share the same package but differ in thermal performance. This model is distinct from the BLM21 series which uses a larger 0805 package.

Chip Ferrite Bead Replacement Considerations

BLM18KG101JH1D shares the 0603 package and 100 Ohm impedance but typically operates up to +125°C or +150°C, not +175°C. Verify if the lower temperature rating of substitutes meets your application needs. No other direct equivalent parts are confirmed in the provided data.