BLM18BD221SN1D

Chip Ferrite Bead Overview

The Murata BLM18BD221SN1D is a single-line chip ferrite bead from the EMIFIL BLM18 series, designed for high-speed signal line noise suppression. It features a 0603 (1608 metric) surface-mount package with dimensions of 1.6 mm length, 0.8 mm width, and 0.8 mm height. The component provides an impedance of 220 Ohms at a test frequency of 100 MHz with a tolerance of 25%. It supports a maximum DC current of 200 mA and has a maximum DC resistance of 450 mOhms. The operating temperature range spans from -55°C to +125°C.

Chip Ferrite Bead Feature Summary

• Engineered specifically for suppressing high-frequency noise in high-speed signal lines
• Utilizes EMIFIL technology within a compact 0603 surface-mount footprint
• Provides stable impedance characteristics across a wide industrial temperature range

Chip Ferrite Bead Applications

• High-speed digital signal line filtering
• Noise suppression in data transmission circuits
• EMI reduction in portable electronic devices

Chip Ferrite Bead Procurement Notes

Verify the specific suffix SN1D against official Murata documentation to confirm packaging and tape specifications. Ensure the selected variant matches the required 200 mA current rating and 450 mOhm DCR limits for the target application. Cross-reference the RoHS status and MSL classification with the latest datasheet before procurement.

Chip Ferrite Bead Selection Notes

Select this component when signal integrity preservation is critical alongside noise attenuation. The low DC resistance minimizes voltage drop in sensitive signal paths. Compare against BLM18BB or BLM18KG series variants if higher current handling or lower impedance is required for power rails rather than signal lines.

Chip Ferrite Bead Part Context

This part belongs to the Murata BLM18 series of EMIFIL chip ferrite beads. The series offers various impedance and current ratings within the standard 0603 package. The BD suffix typically denotes a configuration optimized for signal line applications with moderate current capacity, distinguishing it from power-focused variants in the same family.

Chip Ferrite Bead Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material.