BLM18KG300TN1D

Chip Ferrite Bead Overview

The Murata BLM18KG300TN1D is a single-line ferrite chip bead in the EMIFIL BLM18KG series, designed for high-current power supply applications. 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 30 Ohms at a test frequency of 100 MHz with a tolerance of 25%. It supports a maximum DC current of 5 A and has a maximum DC resistance of 10 mOhms. The operating temperature range spans from -55°C to +125°C.

Chip Ferrite Bead Feature Summary

• Provides excellent noise suppression with low DC resistance for efficient power line filtering
• Capable of managing high DC currents up to 6A within a compact 0603 footprint
• Offers wide impedance availability across the series for diverse filtering requirements

Chip Ferrite Bead Applications

• DC power line filtering for portable navigation devices
• Noise suppression in cellular phone power circuits
• Filtering for personal digital assistant (PDA) power supplies
• EMI reduction in notebook PC power distribution networks
• Audio system power line protection

Chip Ferrite Bead Procurement Notes

Verify the specific suffix TN1D against official Murata documentation to confirm packaging configuration and terminal plating specifications. Ensure the selected variant matches the required impedance tolerance and current rating for the target circuit design before finalizing procurement orders.

Chip Ferrite Bead Selection Notes

Select this component when space-constrained designs require high current handling capabilities in a standard 0603 package. The low DC resistance minimizes power loss and heat generation compared to conventional beads. Consider the 30 Ohm impedance value relative to the target noise frequency spectrum to ensure effective attenuation without excessive voltage drop under load conditions.

Chip Ferrite Bead Part Context

This part belongs to the BLM18KG series, which represents Murata's new high-current power ferrite beads. The series is engineered to handle significantly higher rated currents than conventional 0603 size beads, offering performance comparable to larger 0805 or 1206 components while maintaining a smaller physical footprint and lower cost profile for mobile equipment applications.

Chip Ferrite Bead Replacement Considerations

BLM18KG300TZ1D serves as a verified automotive-grade alternative within the same series.