BLM31KN121SZ1L

Chip Ferrite Bead Overview

The Murata BLM31KN121SZ1L is a single-line chip ferrite bead in the BLM series, designed for power line noise suppression. It features a 1206 (3216 metric) surface-mount package with dimensions of 3.20mm x 1.60mm x 1.80mm maximum height. The component provides an impedance of 120 Ohms at 100 MHz and supports a maximum DC current of 6A. It has a maximum DC resistance of 9 mOhms and operates within a temperature range of -55°C to +125°C. The part is AEC-Q200 qualified.

Chip Ferrite Bead Feature Summary

• Functions as a resistor at noise frequencies to reduce resonance possibilities
• Maintains signal waveform integrity during operation
• Designed for high-rated current applications in automotive contexts

Chip Ferrite Bead Applications

• AI Servers
• Automotive electronics
• Power line noise filtering

Chip Ferrite Bead Procurement Notes

Verify the specific suffix codes against official Murata documentation to ensure correct impedance and current ratings. Confirm AEC-Q200 qualification status if automotive compliance is required. Check datasheet revisions for any updates to mechanical dimensions or electrical tolerances before finalizing design integration.

Chip Ferrite Bead Selection Notes

Select this component when high current handling up to 6A is required alongside significant noise attenuation. The low DC resistance minimizes voltage drop in power distribution networks. Ensure the 1206 footprint fits the PCB layout constraints and that the operating temperature range meets environmental specifications.

Chip Ferrite Bead Part Context

This part belongs to the BLM31K series, which specializes in high-rated current SMD ferrite beads. The series is engineered to provide effective electromagnetic interference suppression while maintaining stable performance under high load conditions typical in modern electronic systems.

Chip Ferrite Bead Replacement Considerations

Consult official substitution guides for equivalent parts within the BLM31 family. Verify that alternative components match the 120 Ohm impedance at 100 MHz and support at least 6A continuous current to maintain circuit functionality.