BLM21SP471SN1D

Chip Ferrite Bead Overview

The Murata BLM21SP471SN1D 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 rated current of 300 mA. The component has a maximum DC resistance of 350 milliohms and operates within a temperature range of -55°C to +125°C. It utilizes a 0805 (2012 metric) surface-mount package with dimensions of 2.00 mm in length and 1.25 mm in width, reaching a maximum height of 1.05 mm.

Chip Ferrite Bead Feature Summary

• Provides effective high-frequency noise attenuation for sensitive signal lines through ferrite material properties.
• Supports surface-mount assembly in compact 0805 footprints for space-constrained circuit designs.
• Maintains stable electrical characteristics across a wide industrial operating temperature range.

Chip Ferrite Bead Applications

• Noise filtering for general-purpose electronic circuits
• Signal line protection in consumer electronics
• EMI suppression in digital interface pathways

Chip Ferrite Bead Procurement Notes

Verify the specific suffix SN1D against official Murata documentation to confirm packaging type and terminal finish. Ensure the selected variant matches the required current rating and impedance tolerance for the target application. Cross-reference the manufacturer part number with authorized distributor catalogs to confirm availability and authenticity before procurement.

Chip Ferrite Bead Selection Notes

Select this component when a 470 Ohm impedance at 100 MHz is required for signal integrity management. The 300 mA current rating suits low-power signal paths rather than power delivery lines. Consider the 0805 footprint constraints and ensure the PCB layout accommodates the specified physical dimensions and thermal requirements.

Chip Ferrite Bead Part Context

This component belongs to the Murata EMIFIL BLM21 series of ferrite beads. The series offers various impedance values and current ratings in standardized packages. The BLM21SP variant specifically targets applications requiring moderate current handling with high-frequency noise suppression capabilities in a standard surface-mount form factor.

Chip Ferrite Bead Replacement Considerations

Direct substitutes include other Murata BLM21 series parts with matching 470 Ohm impedance and similar current ratings, such as BLM21BD471SN1D or BLM21RK471SN1D, provided they meet the specific current and DCR requirements of the design.