BLM21BB201SH1D

Chip Ferrite Bead Overview

The Murata BLM21BB201SH1D is a single-line ferrite chip bead designed for electromagnetic interference suppression in surface-mount applications. It features an impedance of 200 Ohms at a test frequency of 100 MHz with a tolerance of 25%. The component supports a maximum DC current of 1 Ampere and exhibits a maximum DC resistance of 200 milliohms. It operates within a temperature range of -55°C to +125°C and meets AEC-Q200 automotive qualification standards. The physical dimensions are 2.0 mm in length, 1.25 mm in width, and 0.85 mm in height, conforming to the 0805 (2012 metric) package.

Chip Ferrite Bead Feature Summary

• Provides effective high-frequency noise attenuation through resistive loss mechanisms in ferrite material.
• Automotive-grade reliability certified under AEC-Q200 standards for harsh environment durability.
• Compact surface-mount footprint enables dense circuit board layout optimization.

Chip Ferrite Bead Applications

• Power supply line filtering in automotive electronic control units
• Noise suppression on data bus lines in vehicle infotainment systems
• EMI mitigation in compact mobile device power circuits

Chip Ferrite Bead Procurement Notes

Verify the complete part number including suffixes against official Murata documentation to ensure correct impedance and tolerance specifications. Confirm RoHS compliance status and manufacturing origin details prior to procurement. Cross-reference datasheet revision dates to validate parameter accuracy. Ensure storage conditions adhere to moisture sensitivity level requirements specified in the product guidelines.

Chip Ferrite Bead Selection Notes

Select this component when a 200 Ohm impedance at 100 MHz is required for single-line differential mode filtering. Evaluate the 1 Ampere current rating against peak load currents to prevent saturation or excessive heating. Consider the 200 milliohm DC resistance impact on voltage drop in low-voltage power rails. Verify that the 0805 package size fits the available PCB real estate constraints.

Chip Ferrite Bead Part Context

This component belongs to the Murata EMIFIL BLM21 series, which offers various impedance values in a standardized 0805 package. The series is widely utilized in automotive and industrial electronics for common-mode and differential-mode noise suppression. The BLM21BB variant specifically denotes the standard impedance grade within this family.

Chip Ferrite Bead Replacement Considerations

Equivalent parts from other manufacturers must match the 200 Ohm @ 100 MHz impedance, 1A current rating, and 0805 package dimensions. Verify thermal characteristics and AEC-Q200 certification if automotive application is required. Check DC resistance limits to ensure compatibility with existing circuit voltage drops.