BLM18KG121TN1D

Chip Ferrite Bead Overview

The Murata BLM18KG121TN1D is a surface-mount ferrite bead in the 0603 (1608 metric) package. It provides an impedance of 120 Ω at 100 MHz with a tolerance of ±25%. The component supports a maximum DC current of 3 A and has a maximum DC resistance of 30 mΩ. It operates within a temperature range of -55°C to +125°C. Physical dimensions are 1.6 mm in length, 0.8 mm in width, and 0.8 mm in height.

Chip Ferrite Bead Feature Summary

• High current handling capability up to 3A for power line applications
• Low DC resistance to minimize power loss and extend battery life
• Nickel barrier structure external electrodes for excellent soldering heat resistance
• Resistive noise suppression design reduces resonance probability and signal waveform distortion

Chip Ferrite Bead Applications

• DC power line filtering for compact mobile equipment
• Noise suppression in portable navigation devices
• EMI filtering in cellular phones and personal digital assistants
• Power supply circuits in notebook PCs and audio systems

Chip Ferrite Bead Procurement Notes

Verify the complete part number including suffixes such as TN1D to ensure correct impedance, current rating, and packaging configuration. Confirm RoHS compliance status and specific datasheet revisions prior to ordering. Cross-reference manufacturer specifications against distributor listings to validate technical parameters and availability constraints.

Chip Ferrite Bead Selection Notes

Select this component when high current capacity is required in a compact 0603 footprint. The low DC resistance makes it suitable for battery-powered devices where power efficiency is critical. Ensure the operating environment stays within the specified -55°C to +125°C range. Compare against standard ferrite beads if higher current ratings or different impedance characteristics are needed.

Chip Ferrite Bead Part Context

This component belongs to the BLM18KG series, designed as high-current power ferrite beads. It offers improved performance over conventional 0603 size beads by managing significantly higher rated currents while maintaining low DC resistance. The series is engineered to replace larger 0805 and 1206 components, providing cost-effective noise suppression solutions for modern electronic designs.

Chip Ferrite Bead Replacement Considerations

BLM18KG471SN1D: Higher impedance variant within the same series.