BLM31KN471SH1K

Chip Ferrite Bead Overview

The Murata BLM31KN471SH1K is a single-channel ferrite chip bead designed for power line noise suppression. It features a 1206 (3216 metric) surface-mount package with dimensions of 3.20 mm length, 1.60 mm width, and a maximum height of 1.80 mm. 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 of 4 A and has a maximum DC resistance of 20 mOhms. The device operates within a temperature range of -55°C to +125°C and holds AEC-Q200 qualification.

Chip Ferrite Bead Feature Summary

• Functions as a resistor at noise frequencies to reduce resonance possibilities and preserve signal waveform integrity.
• AEC-Q200 qualified for automotive electronics reliability standards.
• High rated current capability suitable for power line applications.

Chip Ferrite Bead Applications

• Power line noise suppression in automotive systems
• EMI suppression filter circuits
• AI server power distribution networks

Chip Ferrite Bead Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and availability status. Note that this part number may be discontinued or subject to supply limitations; check current stock levels and lead times through authorized distributors before finalizing procurement plans.

Chip Ferrite Bead Selection Notes

Select this component when high current handling up to 4 A is required alongside significant impedance at 100 MHz. Ensure the 1206 footprint fits the PCB layout constraints. Consider the low DC resistance of 20 mOhms to minimize voltage drop in power lines compared to higher resistance alternatives.

Chip Ferrite Bead Part Context

This component belongs to the BLM31KN series of high-rated current SMD ferrite beads manufactured by Murata Electronics. The series is specifically engineered for demanding applications such as AI servers and automotive electronics, offering robust performance in suppressing electromagnetic interference on power lines.

Chip Ferrite Bead Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing designs using SimSurfing tools or consult manufacturer catalogs for alternative values within the same series.