BLM31KN271SN1K

Chip Ferrite Bead Overview

The Murata Electronics BLM31KN271SN1K 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 3.2mm length, 1.6mm width, and 1.80mm maximum height. The component provides an impedance of 270 Ohms at a test frequency of 100 MHz. It supports a maximum DC current rating of 4.5A and maintains a maximum DC resistance of 16 mOhms. The device operates within a temperature range of -55°C to +125°C and holds AEC-Q200 qualification.

Chip Ferrite Bead Feature Summary

• Automotive-grade reliability certified under the AEC-Q200 standard
• High current handling capability suitable for power line applications
• Compact 1206 surface-mount footprint for space-constrained designs

Chip Ferrite Bead Applications

• Power line noise filtering in automotive electronic systems
• EMI suppression in AI server power distribution networks
• General-purpose high-current circuit protection

Chip Ferrite Bead Procurement Notes

Verify the specific suffix against official documentation to confirm exact electrical tolerances and packaging configurations. Ensure the selected variant matches the required impedance and current ratings for the target application. Cross-reference the part number with the manufacturer's latest datasheet to validate availability and compliance status before finalizing procurement decisions.

Chip Ferrite Bead Selection Notes

Select this component when designing circuits requiring robust noise attenuation on high-current power rails. The 1206 package offers a balance between current capacity and board space efficiency. Consider the 270 Ohm impedance value relative to the target noise frequencies and the 4.5A current rating to ensure thermal stability under continuous load conditions without exceeding the specified DC resistance limits.

Chip Ferrite Bead Part Context

This component belongs to the BLM31KN series, which specializes in high-rated current SMD ferrite beads. The series is engineered for demanding environments, including automotive and industrial applications. It shares the physical 1206 form factor with other variants in the family but differs in impedance and current specifications based on the internal ferrite material composition and design.

Chip Ferrite Bead Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source data.