BLM21BD471SN1D

Chip Ferrite Bead Overview

The Murata BLM21BD471SN1D is a single-line ferrite bead chip designed for signal line noise suppression. It features an impedance of 470 Ohms at 100 MHz and supports a maximum DC current of 300 mA. The component has a maximum DC resistance (DCR) of 350 milliohms. It utilizes a 0805 (2012 metric) surface-mount package with dimensions of 2.00 mm in length, 1.25 mm in width, and a maximum height of 1.05 mm. The device operates within a temperature range of -55°C to 125°C.

Chip Ferrite Bead Feature Summary

• Provides high-impedance noise attenuation for single signal lines at 100 MHz
• Supports continuous DC currents up to 300 mA with low series resistance
• Constructed as a monolithic chip for reliable surface-mount integration

Chip Ferrite Bead Applications

• General electronic circuit noise filtering
• Signal line interference suppression
• Audio line noise filtering

Chip Ferrite Bead Procurement Notes

Verify the specific suffix SN1D against the manufacturer datasheet to confirm the exact rated current and impedance tolerance. Ensure the procurement specification matches the required 300 mA rating rather than lower-rated variants within the same family. Confirm RoHS3 compliance status for regulatory adherence.

Chip Ferrite Bead Selection Notes

Select this component when a 0805 footprint is required for signal integrity management. The 300 mA rating distinguishes it from similar impedance parts with lower current capabilities. Verify that the 350 mOhm DCR meets the voltage drop requirements of the target circuit design.

Chip Ferrite Bead Part Context

This part belongs to the Murata EMIFIL BLM21B series of ferrite beads. It is a passive filter component used to suppress electromagnetic interference in compact electronic assemblies. The product is currently active and available in standard tape-and-reel packaging formats.

Chip Ferrite Bead Replacement Considerations

BLM21RK471SN1D offers identical impedance but with a 200 mA rating and 250 mOhm DCR. BLM21BD471SDPT is listed as an alias. Verify current handling requirements before substituting.