BLM31KN121SZ1K

Chip Ferrite Bead Overview

The Murata BLM31KN121SZ1K is a single-channel chip ferrite bead in a 1206 (3216 metric) surface-mount package. It provides an impedance of 120 Ohms at a test frequency of 100 MHz with a tolerance of 25%. The component supports a maximum DC current of 6 A and features a maximum DC resistance of 9 mOhms. It operates within a temperature range of -55°C to +125°C and holds AEC-Q200 qualification for automotive reliability.

Chip Ferrite Bead Feature Summary

• Functions as a resistor at noise frequencies to reduce resonance and preserve signal waveforms
• AEC-Q200 qualified for automotive electronic applications
• High rated current capability suitable for power line filtering

Chip Ferrite Bead Applications

• Automotive electronics
• Power line EMI suppression
• AI server circuits

Chip Ferrite Bead Procurement Notes

Verify the specific suffix against official documentation, as ordering codes may indicate variations in packaging or tape specifications rather than functional changes. Confirm availability through authorized channels due to potential supply constraints. Ensure the selected variant matches the required reel or cut-tape format for the manufacturing process.

Chip Ferrite Bead Selection Notes

Select this component when high current handling is required alongside effective high-frequency noise attenuation. The low DC resistance minimizes voltage drop in power distribution networks. Verify that the 1206 footprint accommodates the design constraints and that the 6 A rating exceeds the peak operational current of the target circuit.

Chip Ferrite Bead Part Context

This part belongs to the BLM series of chip ferrite beads designed for electromagnetic interference suppression. The BLM31KN sub-series specifically targets high-current applications, offering robust performance in compact surface-mount packages. It serves as a critical passive component for maintaining signal integrity in noisy environments.

Chip Ferrite Bead Replacement Considerations

BLM31KN121SH1K shares identical electrical parameters including 120 Ohm impedance and 6 A rating. Verify package height and termination compatibility before substitution. Consult manufacturer catalogs for alternative high-current ferrite beads with matching impedance curves.