BLM21SP111BH1D

Chip Ferrite Bead Overview

The Murata BLM21SP111BH1D is a surface-mount ferrite bead from the BLM21_H series, designed for power line noise suppression. It features an 0805 (2012 metric) package with dimensions of 2 mm length, 1.25 mm width, and 0.85 mm height. The component provides an impedance of 110 Ohms at 100 MHz with a tolerance of ±25%. It supports a maximum DC current of 5 A and has a maximum DC resistance of 5 mOhms. The device operates within a temperature range of -55°C to +150°C.

Chip Ferrite Bead Feature Summary

• Designed for high-current power line applications with a rated current capacity of 5 A
• Provides effective high-frequency noise attenuation in compact surface-mount form factors
• Engineered for automotive reliability with qualification under AEC-Q200 standards

Chip Ferrite Bead Applications

• Automotive electronic systems requiring EMI suppression on power rails
• High-current DC-DC converter output filtering
• Noise reduction in vehicle infotainment and control unit power supplies

Chip Ferrite Bead Procurement Notes

Verify the specific suffix BH1D against official Murata documentation to confirm the exact impedance value and current rating, as suffixes define critical electrical parameters. Ensure the procurement source provides valid RoHS compliance data and confirms AEC-Q200 qualification status for automotive-grade requirements before finalizing orders.

Chip Ferrite Bead Selection Notes

Select this component when circuit designs require handling high continuous currents up to 5 A while maintaining low DC resistance to minimize power loss. The 0805 footprint offers a balance between current handling capability and board space efficiency compared to smaller packages. Verify that the target application frequency aligns with the 110 Ohm impedance specification at 100 MHz for optimal noise suppression performance.

Chip Ferrite Bead Part Context

This part belongs to the BLM21_H series, which specializes in high-current ferrite beads for automotive and industrial power applications. Unlike standard signal-line beads, this series prioritizes thermal stability and saturation characteristics to maintain performance under heavy load conditions typical in modern vehicle electronics and power distribution networks.

Chip Ferrite Bead Replacement Considerations

Consult official Murata substitution guides for verified equivalents. Cross-referencing requires matching the 0805 package, 5 A current rating, and 110 Ohm impedance at 100 MHz to ensure functional compatibility without redesigning the PCB layout.