BLM18RK471SN1D

Chip Ferrite Bead Overview

The Murata BLM18RK471SN1D is a single-line chip ferrite bead from the EMIFIL BLM18RK series, designed for high-frequency noise suppression in digital interface applications. 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 470 Ohms at a test frequency of 100 MHz with a tolerance of 25%. It supports a maximum DC current rating of 200 mA and has a maximum DC resistance of 500 mOhms. The device operates within a temperature range of -55°C to +125°C.

Chip Ferrite Bead Feature Summary

• Suppresses high-frequency noise in digital interface circuits
• Single-line configuration for compact PCB layouts
• Compliant with RoHS 3 standards

Chip Ferrite Bead Applications

• Digital interface noise suppression
• High-frequency noise filtering
• EMI suppression filters

Chip Ferrite Bead Procurement Notes

Verify the specific electrical parameters against the official Murata datasheet before integration, as specifications may vary by revision. Confirm that the 0603 package dimensions and termination style match the target PCB footprint. Ensure the 200 mA current rating meets the circuit requirements to prevent saturation or excessive heating during operation.

Chip Ferrite Bead Selection Notes

Select this component when a low-current solution is required for digital lines, distinguishing it from higher-current variants like the BLM18KG series which support up to 1.5 A. The 470 Ohm impedance value is suitable for attenuating specific noise frequencies around 100 MHz. Consider the 500 mOhms DC resistance impact on signal integrity and power loss in the specific application path.

Chip Ferrite Bead Part Context

This part belongs to the Murata EMIFIL BLM18RK series, which specializes in ferrite beads for digital interfaces. It shares the standard 0603 form factor with other BLM18 series components but is optimized for lower current applications compared to the KG or HD series. The RK series focuses on providing effective noise suppression for sensitive digital signals where current consumption is minimal.

Chip Ferrite Bead Replacement Considerations

Direct substitutes include the BLM18HK471SN1D and BLM18HD471SN1D, which share the same impedance and package but differ in current ratings. Verify compatibility with the BLM18KG471SN1D if higher current handling is acceptable, noting the significant difference in DC current capacity.