BLM21BB121SZ1D

Chip Ferrite Bead Overview

The Murata BLM21BB121SZ1D is a single-line chip ferrite bead in the 0805 (2012 metric) surface-mount package. It provides an impedance of 120 Ohms at a test frequency of 100 MHz with a tolerance of 25%. The component supports a maximum DC current of 600 mA and features a maximum DC resistance of 190 mOhms. It operates within a temperature range of -55°C to +125°C and holds AEC-Q200 qualification for automotive applications.

Chip Ferrite Bead Feature Summary

• AEC-Q200 qualified for automotive reliability standards
• Designed for EMI suppression in high-speed signal lines
• Unshielded construction suitable for general noise filtering

Chip Ferrite Bead Applications

• Automotive infotainment systems
• High-speed data line noise suppression
• General electronic circuit EMI filtering

Chip Ferrite Bead Procurement Notes

Verify the specific suffix 'SZ1D' against official Murata documentation to confirm exact packaging and tape-and-reel specifications. Ensure the selected variant matches the required impedance tolerance and current rating for the target application circuit design.

Chip Ferrite Bead Selection Notes

Select this component when a 0805 footprint is required for automotive-grade noise suppression. The 600 mA rating suits moderate current signal lines, while the 120 Ohm impedance targets specific high-frequency interference bands. Confirm thermal management requirements align with the 125°C maximum operating limit.

Chip Ferrite Bead Part Context

This part belongs to the BLM21_Z series of EMIFIL ferrite beads. It is designed to suppress electromagnetic interference in digital circuits. The series offers various impedance values within the standard 0805 package size to accommodate different filtering needs across consumer and automotive electronics.

Chip Ferrite Bead Replacement Considerations

BLM21BB121SN1D is a documented substitute within the same series offering identical electrical characteristics and package dimensions.