BLM31KN121SH1L

Chip Ferrite Bead Overview

The Murata BLM31KN121SH1L is a single-line chip ferrite bead designed for power line noise suppression in the 1206 (3216 metric) surface-mount package. It exhibits an impedance of 120 Ohms at 100 MHz with a maximum DC resistance of 20 milliohms and a rated current capacity of 6 Amperes. 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

• Functions as a resistive element at high frequencies to suppress electromagnetic interference without distorting signal waveforms.
• Engineered for high-current power line applications with low DC resistance to minimize insertion loss.
• Automotive-grade construction compliant with AEC-Q200 reliability standards.

Chip Ferrite Bead Applications

• Noise filtering for power lines in automotive electronic systems
• Electromagnetic interference suppression in AI server infrastructure
• High-current circuit protection in industrial equipment

Chip Ferrite Bead Procurement Notes

Verify the specific suffix SH1L against official Murata documentation to confirm packaging configuration and terminal finish. Ensure the selected variant matches the required impedance tolerance and current rating for the target application. Cross-reference the manufacturer part number with authorized distributor catalogs to validate authenticity and traceability before procurement.

Chip Ferrite Bead Selection Notes

Select this component when designing circuits requiring high current handling capability alongside effective high-frequency noise attenuation. The 1206 footprint offers a balance between thermal performance and board space efficiency. Consider the 6A rating and low DC resistance to ensure minimal voltage drop across the filter in power distribution networks.

Chip Ferrite Bead Part Context

This component belongs to the Murata EMIFIL BLM31KN series, which specializes in high-rated current SMD ferrite beads. The series is specifically engineered for demanding environments, including automotive electronics and AI servers, where robust noise suppression and high current capacity are critical for system stability and compliance.

Chip Ferrite Bead Replacement Considerations

Publicly confirmed substitute part numbers for this specific model were not identified in the provided source material. Consult official Murata resources or SimSurfing design tools for verified alternatives that match the electrical and mechanical specifications.

Chip Ferrite Bead FAQ

What is the impedance value of the BLM31KN121SH1L at the standard test frequency?

The impedance is 120 Ohms at 100 MHz.

Does this component meet automotive reliability standards?

Yes, the BLM31KN121SH1L is qualified according to the AEC-Q200 standard.