BLM31SN500SN1L

Chip Ferrite Bead Overview

The Murata BLM31SN500SN1L is a single-line ferrite bead in a 1206 (3216 metric) surface-mount package. It provides an impedance of 50 Ohms at 100 MHz with a 25% tolerance. The component supports a maximum DC current of 12 A and has a maximum DC resistance of 1.6 mOhms. It operates within a temperature range of -55°C to +125°C and holds AEC-Q200 qualification.

Chip Ferrite Bead Feature Summary

• AEC-Q200 qualified for automotive reliability standards
• High current handling capability up to 12 A
• Low DC resistance for minimal power loss
• Single-line configuration for power supply filtering

Chip Ferrite Bead Applications

• Automotive power line noise suppression
• DC-DC converter output filtering
• High-current digital circuit decoupling

Chip Ferrite Bead Procurement Notes

Verify the suffix SN1L against SZ1L or other variants to ensure correct impedance and current ratings. Confirm RoHS compliance status and packaging type (Reel, Cut Tape, or MouseReel) matches production requirements. Check AEC-Q200 certification if automotive application is mandatory.

Chip Ferrite Bead Selection Notes

Select this component when high current capacity is required alongside moderate high-frequency attenuation. The 1206 package offers a balance between current handling and board space. Ensure the 50 Ohm impedance aligns with the target noise frequency spectrum and system impedance matching needs.

Chip Ferrite Bead Part Context

This part belongs to the Murata EMIFIL BLM31 series, designed for noise suppression in electronic circuits. The BLM31SN variant specifically targets high-current applications, distinguishing it from lower-current counterparts in the same footprint family.

Chip Ferrite Bead Replacement Considerations

Direct substitutes include BLM31SN500SZ1L, which shares identical electrical specifications but may differ in packaging or suffix coding. Verify pinout and mechanical dimensions before substitution.