BLM15BB121SN1D

Chip Ferrite Bead Overview

The Murata BLM15BB121SN1D is a single-line EMIFIL chip ferrite bead designed for high-speed signal line applications. It provides an impedance of 120 Ohms at 100 MHz with a tolerance of ±25%. The component features a maximum DC resistance of 550 mOhms and supports a rated current of 300 mA. Housed in a compact 0402 (1005 metric) surface-mount package measuring 1.0 mm x 0.5 mm x 0.55 mm, it operates within a temperature range of -55°C to +125°C.

Chip Ferrite Bead Feature Summary

• Suppresses high-frequency noise in high-speed signal lines
• Designed to reduce resonance probability and prevent signal distortion
• Nickel barrier layer on external electrodes ensures excellent soldering heat resistance

Chip Ferrite Bead Applications

• EMI suppression for notebook PCs and digital still cameras
• Noise suppression for data lines
• Prevention of errors caused by local oscillator signals in mobile phones

Chip Ferrite Bead Procurement Notes

Verify the specific suffix SN1D against official Murata documentation to confirm packaging configuration. Ensure the selected variant matches the required 300mA rating and 550mOhm DCR specifications for the target circuit design.

Chip Ferrite Bead Selection Notes

Select this component when low DC resistance is critical for maintaining signal integrity in high-current paths. The 0402 footprint allows for dense PCB layouts. Confirm that the 120 Ohm impedance profile aligns with the noise frequency spectrum of the application.

Chip Ferrite Bead Part Context

This part belongs to the Murata BLM15BB series of EMIFIL chip ferrite beads. These components are engineered specifically for suppressing high-frequency noise in high-speed signal lines without requiring a ground connection, making them suitable for circuits lacking stable grounding.

Chip Ferrite Bead Replacement Considerations

Publicly confirmed substitute part numbers include MFBW1V1005-121-R from Eaton, as well as comparable offerings from TDK and Bourns Inc.