BLM21BB331SN1D

Chip Ferrite Bead Overview

The Murata BLM21BB331SN1D is a single-line ferrite bead chip designed for signal line noise suppression. It features an impedance of 330 Ohms at 100 MHz and supports a maximum rated current of 400 mA. The component has a maximum DC resistance of 330 milliohms and operates within a temperature range of -55°C to 125°C. It utilizes a 0805 (2012 metric) surface mount package with dimensions of 2.00 mm in length, 1.25 mm in width, and a maximum height of 1.45 mm.

Chip Ferrite Bead Feature Summary

• Provides effective high-frequency noise attenuation for sensitive signal lines through ferrite material properties.
• Supports automotive infotainment applications with AEC-Q200 qualification standards.
• Enables compact circuit board layouts via a standardized 0805 surface-mount footprint.

Chip Ferrite Bead Applications

• Automotive infotainment system noise filtering
• Signal line EMI suppression in electronic circuits
• High-speed data interface protection

Chip Ferrite Bead Procurement Notes

Verify the specific suffix SN1D against project requirements to ensure compatibility with standard packaging formats such as tape and reel or cut tape. Confirm that the 400 mA current rating aligns with the target signal line load. Check RoHS3 compliance status if required by regional regulations. Ensure storage conditions respect the moisture sensitivity level classification to prevent soldering defects during assembly.

Chip Ferrite Bead Selection Notes

Select this component when a 330 Ohm impedance at 100 MHz is required for signal integrity management. The 400 mA current capacity suits low-power signal lines rather than power distribution paths. Consider the 0805 package size for space-constrained designs where larger footprints are unavailable. Evaluate the 330 milliohm DC resistance impact on signal voltage levels before finalizing the design choice.

Chip Ferrite Bead Part Context

This part belongs to the Murata EMIFIL BLM21 series of ferrite beads. The series offers various impedance and current ratings across different package sizes. The BB variant specifically targets automotive and industrial applications requiring robust noise suppression capabilities within a compact form factor suitable for automated surface-mount assembly processes.

Chip Ferrite Bead Replacement Considerations

Direct substitutes include other Murata BLM21BB331 variants with identical electrical characteristics but different packaging suffixes. Cross-brand replacements require matching the 330 Ohm @ 100 MHz impedance, 400 mA current rating, and 0805 footprint dimensions to maintain circuit performance and mechanical fit.