BLM21PG121SH1D

Chip Ferrite Bead Overview

The Murata BLM21PG121SH1D is a surface-mount ferrite chip bead designed for electromagnetic interference (EMI) suppression. It features 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 3 Amperes and exhibits a maximum DC resistance of 30 milliohms. Housed in a standard 0805 package measuring 2.0 mm in length, 1.25 mm in width, and 0.85 mm in height, it operates within a temperature range of -55°C to +125°C.

Chip Ferrite Bead Feature Summary

• Provides effective high-frequency noise attenuation for power lines
• Supports high-current applications with low DC resistance
• Designed for reliable operation in automotive-grade environments

Chip Ferrite Bead Applications

• Power supply filtering
• EMI suppression filters
• Automotive electronic circuits

Chip Ferrite Bead Procurement Notes

Verify the specific suffix SH1D against official Murata documentation to confirm packaging configuration and material compliance. 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 designing circuits requiring robust EMI filtering on power rails carrying currents up to 3A. The 0805 footprint offers a balance between thermal performance and board space efficiency. Confirm that the 120-ohm impedance profile aligns with the noise spectrum present in the application environment.

Chip Ferrite Bead Part Context

This part belongs to the BLM21PG series of ferrite beads manufactured by Murata Electronics. The series is characterized by its suitability for automotive applications, adhering to AEC-Q200 standards. The BLM21PG line provides various impedance and current ratings within the 0805 package format to address diverse filtering requirements.

Chip Ferrite Bead Replacement Considerations

Cross-reference with other BLM21PG variants or equivalent 0805 ferrite beads from Murata if impedance or current ratings differ. Verify pin compatibility and physical dimensions before substituting.