BLM31KN471SZ1K

Chip Ferrite Bead Overview

The Murata BLM31KN471SZ1K is a single-channel surface-mount ferrite bead designed for power line noise suppression. It features an impedance of 470 Ohms at a test frequency of 100 MHz and supports a maximum DC current of 4 Amperes. The component has a maximum DC resistance of 20 milliohms and operates within a temperature range of -55°C to +125°C. It utilizes a 1206 (3216 metric) package with dimensions of 3.20mm length, 1.60mm width, and a maximum height of 1.80mm.

Chip Ferrite Bead Feature Summary

• Engineered for high-rated current applications in automotive electronics
• Provides effective electromagnetic interference suppression on DC power lines
• Constructed as a single-channel surface-mount device

Chip Ferrite Bead Applications

• Automotive electronic circuits requiring AEC-Q200 compliance
• Power line noise filtering in AI server infrastructure
• General EMI suppression in high-current DC applications

Chip Ferrite Bead Procurement Notes

Verify the specific suffix against official documentation, as variations may indicate different packaging or minor specification changes. Confirm availability status directly with authorized distributors, as supply constraints can affect delivery timelines. Ensure the component meets the required automotive qualification standards if used in regulated environments.

Chip Ferrite Bead Selection Notes

Select this component when a 470 Ohm impedance at 100 MHz is required for power line filtering. The 4A current rating makes it suitable for higher power applications compared to standard signal-line beads. Consider the 1206 footprint for PCB layout compatibility and verify thermal management requirements given the low DC resistance.

Chip Ferrite Bead Part Context

This part belongs to the BLM31KN series, which is specifically marketed for high-rated current SMD ferrite beads. The series targets demanding applications such as AI servers and automotive systems, distinguishing it from lower-current general-purpose ferrite beads in the broader BLM family.

Chip Ferrite Bead Replacement Considerations

Check for BLM31KN471SZ1L as a potential variant with identical electrical characteristics but potentially different packaging. Verify that any substitute maintains the 4A current rating and 1206 package dimensions to ensure mechanical fit.