BLM21HE472BH1L

Chip Ferrite Bead Overview

The Murata BLM21HE472BH1L is a surface-mount ferrite bead in the EMIFIL® series, designed for high-current power line noise suppression. It features an impedance of 4700 Ohms at 100 MHz and supports a maximum DC current of 850 mA with a maximum DC resistance of 400 mOhms. The component operates within a temperature range of -55°C to +125°C and holds AEC-Q200 automotive qualification. Its physical dimensions are 2.0 mm in length, 1.25 mm in width, and 0.85 mm in height, conforming to the 0805 (2012 metric) package standard.

Chip Ferrite Bead Feature Summary

• Provides broadband high-frequency noise suppression for power circuits
• Engineered for high-rated current handling capabilities
• Automotive-grade reliability certified under AEC-Q200 standards

Chip Ferrite Bead Applications

• Power supply circuit noise filtering
• Automotive electronic systems
• Signal line interference suppression

Chip Ferrite Bead Procurement Notes

Verify the specific suffix against official Murata documentation to confirm exact electrical tolerances and termination specifications. Ensure the selected variant matches the required impedance and current ratings for the target application. Cross-reference datasheets to validate compliance with relevant industry standards before finalizing procurement decisions.

Chip Ferrite Bead Selection Notes

Select this component when high current capacity is required alongside effective high-frequency noise attenuation. The 0805 footprint offers a compact solution for space-constrained designs. Verify that the 400 mOhm DC resistance aligns with system voltage drop requirements and that the 850 mA rating exceeds the operational current load.

Chip Ferrite Bead Part Context

This part belongs to the Murata BLM21H series of chip ferrite beads. The series is characterized by its ability to handle higher currents compared to standard signal-line beads, making it suitable for power distribution networks. It utilizes ferrite material to absorb electromagnetic interference across a wide frequency spectrum.

Chip Ferrite Bead Replacement Considerations

Consult official Murata substitution guides for verified equivalents. Ensure any replacement maintains identical impedance characteristics, current ratings, and physical dimensions to guarantee compatibility with existing PCB layouts and thermal management systems.