BLM21AG121SZ1D

Chip Ferrite Bead Overview

The Murata BLM21AG121SZ1D is a single-line chip ferrite bead in the BLM21AG series, housed in an 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 1 Ampere and features a maximum DC resistance of 90 milliohms. It operates within a temperature range of -55°C to +125°C and meets AEC-Q200 automotive qualification standards.

Chip Ferrite Bead Feature Summary

• Provides electromagnetic interference suppression through high-impedance characteristics at specific frequencies.
• Designed for surface-mount assembly in compact electronic circuits.
• Qualified for automotive applications according to AEC-Q200 standards.

Chip Ferrite Bead Applications

• EMI suppression filters
• General-purpose noise filtering
• Automotive electronics

Chip Ferrite Bead Procurement Notes

Verify the exact suffix against official Murata documentation to confirm package dimensions and termination specifications. Ensure the selected variant matches the required impedance and current ratings for the target circuit design. Cross-reference datasheets for any updates on material compliance or manufacturing changes.

Chip Ferrite Bead Selection Notes

Select this component when a 0805 footprint is required for EMI filtering in space-constrained designs. The 1A current rating suits moderate power lines, while the 120 Ohm impedance targets specific noise frequencies. Verify thermal management requirements given the low DC resistance and operating temperature limits.

Chip Ferrite Bead Part Context

This part belongs to the Murata BLM21AG series of chip ferrite beads. The series offers various impedance values and current ratings within the standard 0805 package size. These components are widely used for signal integrity improvement and noise reduction in digital and analog circuits.

Chip Ferrite Bead Replacement Considerations

Publicly confirmed substitute part numbers were not identified in the provided source data. Consult manufacturer cross-reference tools for verified alternatives.

Chip Ferrite Bead FAQ

What is the test frequency for the impedance specification?

The impedance of 120 Ohms is specified at a test frequency of 100 MHz.

Is this component suitable for automotive use?

Yes, the BLM21AG series is qualified under the AEC-Q200 standard for automotive applications.