BLM02AX331SN1D

Chip Ferrite Bead Overview

The Murata BLM02AX331SN1D is a surface-mount ferrite bead from the BLM02AX series, designed for electromagnetic interference suppression in compact electronic circuits. It features a 0402 (1005 metric) package with dimensions of 1.0 mm length, 0.5 mm width, and 0.4 mm height. The component provides an impedance of 330 ohms at 100 MHz with a tolerance of ±25%. It supports a maximum DC current rating of 150 mA and has a maximum DC resistance of 1.4 ohms. The device operates within a temperature range of -55°C to +125°C.

Chip Ferrite Bead Feature Summary

• Provides effective high-frequency noise attenuation through resistive behavior at noise frequencies while maintaining signal integrity.
• Utilizes a nickel barrier structure on external electrodes to ensure excellent thermal resistance during soldering processes.
• Operates without requiring a ground connection, making it suitable for circuits with unstable grounding conditions.

Chip Ferrite Bead Applications

• Suppression of electromagnetic interference in portable communication devices
• Noise filtering in compact consumer electronics with limited board space
• Signal line protection in general-purpose digital circuits

Chip Ferrite Bead Procurement Notes

Verify the specific suffix SN1D against official Murata documentation to confirm the exact termination plating and reel configuration. Ensure that the selected variant matches the required RoHS compliance status for your target market regulations. Cross-reference the impedance value at 100 MHz with schematic requirements to prevent signal degradation in high-speed data lines.

Chip Ferrite Bead Selection Notes

Select this component when board real estate is constrained to the 0402 footprint but higher impedance is needed compared to standard power ferrites. Evaluate the 150 mA current limit against peak load currents to avoid saturation or excessive heating. Consider the low DC resistance of 1.4 ohms for minimal voltage drop in sensitive power rails.

Chip Ferrite Bead Part Context

This part belongs to the BLM02AX series, which focuses on small-form-factor EMI suppression solutions. The series is engineered for applications where space efficiency is critical, such as mobile handsets and wearable technology. It complements larger ferrite beads by offering comparable performance characteristics in a significantly reduced physical volume.

Chip Ferrite Bead Replacement Considerations

Direct substitutes must match the 0402 package, 330 ohm impedance at 100 MHz, and 150 mA current rating. Verify compatibility with existing PCB footprints and soldering profiles. Alternative parts from other manufacturers should be evaluated for similar thermal and electrical performance metrics.