BLM21AG121SH1D

Chip Ferrite Bead Overview

The Murata BLM21AG121SH1D is a single-element ferrite chip bead designed for surface-mount applications in the 0805 (2012 metric) 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 700 mA and features a maximum DC resistance of 200 mOhms. It operates within a temperature range of -55°C to +125°C and holds AEC-Q200 qualification.

Chip Ferrite Bead Feature Summary

• Provides high-impedance attenuation for electromagnetic interference suppression at 100 MHz
• AEC-Q200 qualified for automotive electronic reliability standards
• Compact 0805 surface-mount footprint suitable for space-constrained PCB layouts

Chip Ferrite Bead Applications

• Electromagnetic interference filtering in automotive electronics
• Power supply line noise suppression
• Signal integrity protection in digital circuits

Chip Ferrite Bead Procurement Notes

Verify the specific suffix SH1D against official Murata documentation to confirm tape-and-reel packaging specifications and terminal plating details. Ensure the selected variant matches the required impedance tolerance and current rating for the target circuit design before finalizing procurement orders.

Chip Ferrite Bead Selection Notes

Select this component when a 120 Ohm impedance at 100 MHz is required for EMI suppression in compact designs. Consider the 700 mA current rating and 200 mOhms DC resistance to ensure thermal stability. Verify that the 0805 package dimensions align with the available board space and soldering process capabilities.

Chip Ferrite Bead Part Context

This part belongs to the BLM21 series of ferrite beads, which are widely used for noise suppression in portable devices and automotive systems. The AG121 designation indicates the specific impedance characteristic, while the SH1D suffix defines the packaging and termination style for automated assembly processes.

Chip Ferrite Bead Replacement Considerations

Direct substitutes include other Murata BLM21 series parts with matching 120 Ohm impedance and 0805 footprint, such as BLM21BB121SH1D or BLM21PG121SN1D, provided their current ratings and DC resistance values meet the application requirements.