BLM18EG391TH1D

Chip Ferrite Bead Overview

The Murata BLM18EG391TH1D is a single ferrite chip bead in a 0603 (1608 metric) surface-mount package. It provides an impedance of 390 Ohms at 100 MHz with a 25% tolerance. The component supports a maximum DC current of 1 A and features a maximum DC resistance of 150 mOhms. It operates within a temperature range of -55°C to +125°C. Physical dimensions are 1.6 mm length, 0.8 mm width, and 0.8 mm height.

Chip Ferrite Bead Feature Summary

• Provides high-impedance attenuation for broadband noise suppression in the GHz frequency range.
• Utilizes a compact 0603 footprint suitable for space-constrained printed circuit board layouts.
• Constructed from stable ferrite material ensuring consistent performance across wide temperature variations.

Chip Ferrite Bead Applications

• EMI suppression filters for general-purpose electronic circuits
• Noise filtering in high-speed digital signal lines
• Power supply line decoupling in portable devices

Chip Ferrite Bead Procurement Notes

Verify the specific suffix TH1D against official Murata documentation to confirm impedance tolerance and packaging configuration. Ensure the selected variant matches the required DC current rating and physical height constraints for the target assembly process. Cross-reference the manufacturer part number directly to avoid substitution errors.

Chip Ferrite Bead Selection Notes

Select this component when a 390 Ohm impedance at 100 MHz is required within a standard 0603 envelope. Evaluate the 1 A current carrying capacity against the circuit's operational load to prevent saturation. Confirm that the 150 mOhms DC resistance meets the voltage drop requirements for the specific application path.

Chip Ferrite Bead Part Context

This component belongs to the BLM18EG series of ferrite beads manufactured by Murata Electronics. The series offers various impedance values within the same 0603 package size, allowing designers to customize noise suppression characteristics without altering the board layout footprint.

Chip Ferrite Bead Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source data. Consult official Murata resources for equivalent listings.