BLM21SP181SH1D

Chip Ferrite Bead Overview

The Murata BLM21SP181SH1D is a single-line ferrite chip bead in the EMIFIL BLM21 series, designed for power line noise suppression. It features an impedance of 180 Ohms at 100 MHz with a tolerance of 25%. The component supports a maximum DC current of 4A and has a maximum DC resistance of 90 mOhms. It operates within a temperature range of -55°C to +125°C and meets AEC-Q200 automotive qualification standards. The device utilizes a 0805 (2012 metric) surface mount package with dimensions of 2.0 mm length, 1.25 mm width, and 0.85 mm height.

Chip Ferrite Bead Feature Summary

• Provides effective electromagnetic interference attenuation on power lines through high-impedance ferrite characteristics.

Chip Ferrite Bead Applications

• Automotive electronic systems requiring AEC-Q200 qualified components

Chip Ferrite Bead Procurement Notes

Verify the specific suffix SH1D against official Murata documentation to confirm package type and tape/reel specifications. Ensure compatibility with existing PCB footprints for the 0805 form factor. Cross-reference the impedance value and current rating with circuit design requirements to prevent saturation or insufficient filtering performance.

Chip Ferrite Bead Selection Notes

Select this component when a 0805 footprint is required for power line filtering applications carrying up to 4A. The 180 Ohm impedance at 100 MHz targets specific noise frequencies. Consider the AEC-Q200 certification if the application involves automotive environments. Compare thermal dissipation capabilities against the 90 mOhms DC resistance for efficiency constraints.

Chip Ferrite Bead Part Context

This part belongs to the Murata EMIFIL BLM21 series of ferrite beads. The series offers various impedance values and current ratings in standardized SMD packages. The BLM21SP variant specifically denotes a high-current capability within the 0805 size envelope, distinguishing it from lower-current counterparts in the same family.

Chip Ferrite Bead Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Consult Murata's SimSurfing tool or official distributor databases for equivalent components with matching impedance, current, and package specifications.

Chip Ferrite Bead FAQ

What is the maximum DC current rating for the BLM21SP181SH1D?

The maximum DC current rating is 4A.

Does this component meet automotive reliability standards?

Yes, the BLM21SP181SH1D is qualified under the AEC-Q200 standard.