BLM21BB201SN1D

Chip Ferrite Bead Overview

The Murata BLM21BB201SN1D is a surface-mount chip ferrite bead from the EMIFIL BLM21BB series, designed for high-speed signal line noise suppression. It features an impedance of 200 Ω at 100 MHz with a tolerance of ±25%. The component supports a maximum DC current of 500 mA and has a maximum DC resistance (DCR) of 260 mΩ. It utilizes a 0805 (2012 metric) package measuring 2.00 mm in length, 1.25 mm in width, and 0.85 mm in height. The device operates within a temperature range of -55°C to +125°C.

Chip Ferrite Bead Feature Summary

• Suppresses high-frequency electromagnetic interference in high-speed signal lines
• Provides single-line filtering capability for differential or single-ended signals
• Constructed with unshielded ferrite material for broadband attenuation

Chip Ferrite Bead Applications

• High-speed digital signal line noise suppression
• EMI suppression filters for electronic circuits
• Power supply input/output filtering

Chip Ferrite Bead Procurement Notes

Verify the complete part number including suffix characters (e.g., SN1D) to ensure correct impedance, tolerance, and packaging specifications. Confirm RoHS3 compliance status and moisture sensitivity level (MSL 1) requirements during procurement. Ensure the selected variant matches the specific application's current and thermal constraints.

Chip Ferrite Bead Selection Notes

Select this component when a 200 Ω impedance at 100 MHz is required for signal integrity management. Ensure the circuit current does not exceed 500 mA to prevent saturation. Verify that the 0805 footprint aligns with the PCB layout. Consider the 260 mΩ DCR impact on voltage drop if used in low-voltage power paths.

Chip Ferrite Bead Part Context

This component belongs to the Murata BLM21BB series of EMIFIL chip ferrite beads. The series is engineered for suppressing high-frequency noise in high-speed signal lines. The BLM21BB variants typically offer standardized impedances and current ratings suitable for general-purpose EMI suppression in consumer and industrial electronics.

Chip Ferrite Bead Replacement Considerations

Direct substitutes include other Murata BLM21BB series parts with identical 200 Ω @ 100 MHz impedance and 500 mA rating, such as BLM21BB201SZ1D. Cross-brand replacements must match the 0805 footprint, impedance curve, and current handling capabilities.