BLM18KG700TH1D

Chip Ferrite Bead Overview

The Murata BLM18KG700TH1D is a single-line chip ferrite bead in the EMIFIL BLM18KG series, designed for high-current power line filtering. It features a 0603 (1608 metric) SMD package with dimensions of 1.6 mm length, 0.8 mm width, and 0.75 mm height. The component provides an impedance of 70 Ohms at 100 MHz with a tolerance of 25%. It supports a maximum DC current of 3.5 A and has a maximum DC resistance of 22 mOhms. It operates within a temperature range of -55°C to +125°C and holds AEC-Q200 automotive qualification.

Chip Ferrite Bead Feature Summary

• High current handling capability up to 3.5 A in a compact 0603 footprint
• Low DC resistance of 22 mOhms to minimize power loss
• Automotive grade reliability certified under AEC-Q200 standards

Chip Ferrite Bead Applications

• DC power line filtering for portable mobile equipment
• Noise suppression in cellular phone power circuits
• EMI filtering for notebook PC power supplies
• Audio system power line protection

Chip Ferrite Bead Procurement Notes

Verify the specific suffix TH1D against the official Murata datasheet to confirm the exact impedance value and physical dimensions. Ensure the procurement source provides valid RoHS compliance documentation. Confirm that the delivered units match the AEC-Q200 qualification status required for automotive applications. Check for any recent Product Change Notifications regarding material or manufacturing location updates.

Chip Ferrite Bead Selection Notes

Select this component when space constraints require a 0603 package but higher current ratings than standard beads offer. The low DC resistance makes it suitable for battery-powered devices where efficiency is critical. Compare the 70 Ohm impedance against target noise frequencies to ensure effective suppression. Verify that the 3.5 A rating exceeds the peak current demands of the specific power rail being filtered.

Chip Ferrite Bead Part Context

This part belongs to the Murata BLM18KG series, which are high-current power ferrite beads developed to replace larger 0805 and 1206 components. The series offers significantly lower DC resistance compared to conventional ferrite chip beads, helping to extend battery life in portable electronics. It serves as a direct replacement for legacy parts requiring similar electrical characteristics in a smaller form factor.

Chip Ferrite Bead Replacement Considerations

Check for BLM18KG700TN1D as a potential alternative variant within the same series. Verify if other manufacturers offer equivalent 70 Ohm, 3.5 A ferrite beads in 0603 packages. Ensure any substitute maintains the same AEC-Q200 qualification if used in automotive contexts.