BLM18KG121JH1D

Chip Ferrite Bead Overview

The Murata BLM18KG121JH1D is a single-line surface-mount ferrite bead in a 0603 (1608 metric) package. It provides an impedance of 120 Ohms at 100 MHz with a maximum DC resistance of 30 milliohms. The component supports a rated current of 1.9A and operates within a temperature range of -55°C to +150°C. It meets AEC-Q200 automotive standards and is RoHS compliant.

Chip Ferrite Bead Feature Summary

• Designed as a resistive noise filter to minimize signal waveform distortion and reduce resonance probability without requiring a ground connection.
• Features nickel barrier structure external electrodes for excellent soldering heat resistance, suitable for flow or reflow processes.
• Offers low DC resistance to reduce power consumption and extend battery life in portable applications compared to conventional ferrite chip beads.

Chip Ferrite Bead Applications

• DC power line filtering for compact mobile equipment such as cellular phones and portable navigation devices.
• Noise suppression in notebook PCs, personal digital assistants, and audio systems.
• High-current power circuit filtering in automotive electronics requiring AEC-Q200 compliance.

Chip Ferrite Bead Procurement Notes

Verify the specific suffix against official datasheets, as ordering codes may indicate variations in packaging or tape type rather than functional differences. Confirm that the required impedance tolerance and current rating align with the design specifications before finalizing procurement orders.

Chip Ferrite Bead Selection Notes

Select this component when space constraints require a 0603 footprint but higher current handling than standard beads allows. Ensure the target frequency noise falls within the effective suppression range of the 120 Ohm impedance profile. Verify thermal management requirements given the 1.9A rating and ambient operating conditions.

Chip Ferrite Bead Part Context

This part belongs to the BLM18KG series, which are high-current power ferrite beads developed to handle up to twice the rated current of conventional 0603 size beads. The series aims to replace larger 0805 and 1206 components while maintaining low cost and small form factor advantages.

Chip Ferrite Bead Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Consult official Murata resources for qualified alternatives.

Chip Ferrite Bead FAQ

Does the BLM18KG121JH1D require a ground connection?

No, the BLM series functions effectively in circuits without a stable ground connection because it acts as a resistive noise filter.

What is the maximum operating temperature for this component?

The component has a maximum operating temperature of +150°C.