BLM21BB331SH1D

Chip Ferrite Bead Overview

The BLM21BB331SH1D is a single-line ferrite bead from the Murata EMIFIL BLM21_H series, designed for surface-mount assembly in the 0805 (2012 metric) package. It provides an impedance of 330 Ohms at a test frequency of 100 MHz with a tolerance of 25%. The component supports a maximum DC current of 600 mA and has a maximum DC resistance of 250 mOhms. It operates within a temperature range of -55°C to +125°C and meets AEC-Q200 automotive qualification standards.

Chip Ferrite Bead Feature Summary

• Automotive-grade reliability certified under AEC-Q200 standards
• High current handling capability up to 600 mA
• Compact 0805 surface-mount footprint

Chip Ferrite Bead Applications

• Automotive infotainment systems
• Power supply line filtering
• Signal integrity protection in automotive electronics

Chip Ferrite Bead Procurement Notes

Verify the specific suffix SH1D against official Murata documentation to confirm impedance, tolerance, and packaging details. Ensure the procurement source provides valid RoHS compliance data and confirms the AEC-Q200 certification status for automotive applications. Cross-reference the manufacturer part number with authorized distributor lists to avoid counterfeit components.

Chip Ferrite Bead Selection Notes

Select this component when a 330 Ohm impedance at 100 MHz is required for noise suppression in high-current automotive circuits. The 600 mA rating distinguishes it from lower-current variants in the same package size. Consider the 25% tolerance and 250 mOhms DCR for power loss calculations. Verify thermal performance within the specified -55°C to +125°C operating range.

Chip Ferrite Bead Part Context

This part belongs to the Murata BLM21 family of chip ferrite beads, specifically the H series optimized for automotive use. It shares the standard 0805 dimensions with other BLM21 variants but differs in magnetic material properties and current ratings. The BLM21 series is widely used for EMI suppression in compact electronic designs requiring reliable performance in harsh environments.

Chip Ferrite Bead Replacement Considerations

Direct substitutes include BLM21BB331SZ1D and BLM21BB331SH1D if available, though suffix variations may indicate differences in packaging or specific automotive grade certifications. Verify that any replacement maintains the 330 Ohm impedance, 600 mA current rating, and AEC-Q200 qualification.