BLM21BD331SN1D

Chip Ferrite Bead Overview

The Murata BLM21BD331SN1D is a single-line ferrite bead chip in an 0805 (2012 metric) surface-mount package. It provides an impedance of 330 Ohms at 100 MHz with a maximum DC resistance of 300 milliohms and a rated current of 300 mA. The component operates within a temperature range of -55°C to 125°C and has a maximum height of 1.45 mm.

Chip Ferrite Bead Feature Summary

• Provides high-impedance noise suppression for signal lines in the 0805 footprint
• Engineered for low DC resistance to minimize power loss in sensitive circuits
• Designed for reliable operation across extended industrial temperature ranges

Chip Ferrite Bead Applications

• Noise filtering for audio line signals
• EMI suppression in general electronic equipment
• Signal integrity management in compact mobile devices

Chip Ferrite Bead Procurement Notes

Verify the specific suffix SN1D against official Murata documentation to confirm packaging and terminal specifications. Ensure compatibility with existing PCB footprints and thermal profiles during assembly. Cross-reference the manufacturer part number directly with authorized distributors to avoid counterfeit components.

Chip Ferrite Bead Selection Notes

Select this component when a 330 Ohm impedance at 100 MHz is required within a standard 0805 envelope. The 300 mA current rating suits low-power signal paths rather than high-current power rails. Consider the 300 milliohm DCR for applications where voltage drop must be minimized.

Chip Ferrite Bead Part Context

This part belongs to the Murata EMIFIL BLM21 series, which offers various impedance and current combinations in the 0805 case size. The BD variant specifically targets applications requiring moderate current handling with precise noise attenuation characteristics for digital and analog signal lines.

Chip Ferrite Bead Replacement Considerations

BLM21BB331SN1D offers similar impedance but higher current capacity. BLM21AG331SN1D provides lower DC resistance and height. Verify electrical parameters and physical dimensions before substitution.