BLM18BD121SN1D

Chip Ferrite Bead Overview

The Murata BLM18BD121SN1D is a single ferrite chip bead in the EMIFIL series, designed for high-speed signal line noise suppression. It features a 0603 (1608 metric) surface-mount package with dimensions of 1.6 mm length, 0.8 mm width, and 0.8 mm height. The component provides an impedance of 120 Ohms at a test frequency of 100 MHz with a tolerance of 25%. It supports a maximum DC current of 2 A and has a maximum DC resistance of 50 mOhms. The operating temperature range spans from -55°C to +125°C.

Chip Ferrite Bead Feature Summary

• Optimized for suppressing high-frequency noise in high-speed signal lines
• Nickel barrier electrode structure ensures excellent soldering heat resistance
• No grounding required, suitable for circuits without stable ground references

Chip Ferrite Bead Applications

• High-speed signal line filtering
• EMI suppression filters
• Power supply noise reduction

Chip Ferrite Bead Procurement Notes

Verify the complete part number including the suffix SN1D to ensure correct packaging and specifications. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Cross-reference the datasheet for specific handling and reflow soldering profiles to maintain component integrity during assembly processes.

Chip Ferrite Bead Selection Notes

Select this component when low DC resistance is critical for maintaining signal integrity in high-current paths. The 0603 footprint offers a compact solution for space-constrained designs. Ensure the 120 Ohm impedance at 100 MHz aligns with the target noise frequency spectrum for effective attenuation without excessive signal loss.

Chip Ferrite Bead Part Context

This component belongs to the Murata BLM18BD series of EMIFIL chip ferrite beads. The series is engineered specifically for applications requiring efficient noise suppression in digital and high-speed communication circuits. The design prioritizes minimal insertion loss while providing significant attenuation of unwanted electromagnetic interference.

Chip Ferrite Bead Replacement Considerations

Consult official Murata documentation for verified alternative part numbers within the same series or family that match the required impedance, current rating, and physical dimensions.