BLM18KN331EH1D

Chip Ferrite Bead Overview

The Murata BLM18KN331EH1D is a single ferrite chip bead in the EMIFIL BLM18KN series, housed in a 0603 (1608 metric) surface-mount package. It provides an impedance of 330 Ohms at a test frequency of 100 MHz with a tolerance of ±25%. The component supports a maximum DC current of 1.1 A and features a maximum DC resistance of 0.08 Ohms. It operates within a temperature range of -55°C to +125°C and has physical dimensions of 1.6 mm length, 0.8 mm width, and 0.4 mm height.

Chip Ferrite Bead Feature Summary

• Designed for power line filtering applications to suppress electromagnetic interference.
• Utilizes high-permeability ferrite material for effective noise absorption.
• Single-line configuration suitable for compact circuit board layouts.

Chip Ferrite Bead Applications

• Power supply input filtering
• DC-DC converter output noise suppression
• High-speed digital signal line protection

Chip Ferrite Bead Procurement Notes

Verify the complete part number including suffix EH1D to ensure correct termination plating and packaging format. Confirm that the 0603 footprint matches the target PCB design. Check RoHS compliance status through official manufacturer documentation prior to integration into regulated products.

Chip Ferrite Bead Selection Notes

Select this component when a 330 Ohm impedance at 100 MHz is required for power lines carrying up to 1.1 A. The low DC resistance minimizes voltage drop compared to higher resistance alternatives. Ensure the operating environment stays within the specified -55°C to +125°C thermal limits for reliable performance.

Chip Ferrite Bead Part Context

This component belongs to the Murata EMIFIL BLM18KN series, which focuses on high-current power line applications. The series offers various impedance values in the standard 0603 case size, allowing designers to balance noise suppression requirements with current handling capabilities in space-constrained electronic devices.

Chip Ferrite Bead Replacement Considerations

Cross-reference with other BLM18KN series parts for different impedance or current ratings. Verify equivalent components from other manufacturers by matching impedance curves, current saturation characteristics, and physical dimensions.