BLM18KG471SN1D

Chip Ferrite Bead Overview

The Murata BLM18KG471SN1D is a single-line ferrite chip bead in the EMIFIL BLM18KG series, designed for high-current power applications. It features a 0603 (1608 metric) surface-mount package with dimensions of 1.6mm length and 0.8mm width. The component provides an impedance of 470 ohms at 100 MHz with a tolerance of 25%. It supports a maximum DC current of 1.5 A and has a maximum DC resistance of 130 milliohms. The device operates within a temperature range of -55°C to +125°C.

Chip Ferrite Bead Feature Summary

• High current handling capability suitable for power supply lines
• Low DC resistance to minimize power loss and extend battery life
• Compact 0603 footprint enabling space-efficient circuit board design

Chip Ferrite Bead Applications

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

Chip Ferrite Bead Procurement Notes

Verify the specific suffix SN1D against official Murata documentation to confirm tape and reel packaging specifications. Ensure the selected variant matches the required impedance tolerance and current rating for the target power rail. Cross-reference the RoHS3 compliance status with current regulatory requirements before finalizing procurement orders.

Chip Ferrite Bead Selection Notes

Select this component when designing circuits requiring significant current capacity within a standard 0603 footprint. The low DC resistance characteristic makes it suitable for efficiency-sensitive applications where voltage drop must be minimized. Compare performance against lower-rated series if the operating current exceeds 1.5 A or if higher impedance values are necessary for specific noise profiles.

Chip Ferrite Bead Part Context

This part belongs to the BLM18KG series, which represents Murata's high-current power ferrite beads. The series offers improved current handling compared to conventional 0603 beads, managing up to twice the rated current of standard variants while maintaining a small physical size. It serves as a cost-effective alternative to larger 0805 or 1206 components for power line filtering.

Chip Ferrite Bead Replacement Considerations

BLM18HK471SN1D: Offers similar impedance but with a significantly lower rated current of 200 mA and higher DC resistance.