BLM31KN121SH1K

Chip Ferrite Bead Overview

The Murata BLM31KN121SH1K is a single-line power line ferrite bead in a 1206 (3216 metric) surface-mount package. It provides an impedance of 120 Ohms at 100 MHz with a maximum DC resistance of 9 milliohms and a rated current of 6A. The component operates within a temperature range of -55°C to +125°C and meets AEC-Q200 automotive qualification standards.

Chip Ferrite Bead Feature Summary

• Designed to function as a resistor at noise frequencies to reduce resonance risks
• Maintains signal waveform integrity during high-current operation
• Automotive-grade reliability compliant with AEC-Q200 standards

Chip Ferrite Bead Applications

• AI server power distribution networks
• Automotive electronic control unit filtering
• High-current power line noise suppression

Chip Ferrite Bead Procurement Notes

Verify the specific suffix against official Murata documentation, as ordering codes may indicate variations in packaging or tape specifications rather than functional differences. Confirm availability status directly with authorized distributors, as this specific part number may be discontinued or subject to supply constraints.

Chip Ferrite Bead Selection Notes

Select this component for applications requiring high current handling up to 6A with low insertion loss. Ensure the 1206 footprint fits the PCB layout and that the 120 Ohm impedance at 100 MHz aligns with the target noise frequency spectrum. Verify thermal management requirements given the high current rating.

Chip Ferrite Bead Part Context

This component belongs to the BLM31KN series, which features high-rated current capabilities specifically engineered for demanding environments such as AI servers and automotive systems. The series emphasizes robust performance under heavy load conditions while maintaining effective electromagnetic interference suppression.

Chip Ferrite Bead Replacement Considerations

Consider the BLM31KN121SH1L as a potential alternative if packaging differences are acceptable. Verify electrical parameters and physical dimensions match before substitution.