BLM21BD272SH1L

Chip Ferrite Bead Overview

The Murata BLM21BD272SH1L is a single-line chip ferrite bead designed for automotive applications, certified to AEC-Q200 standards. It features an impedance of 2.7 kOhms at 100 MHz with a tolerance of 25%. The component supports a maximum DC current of 200 mA and has a maximum DC resistance of 800 mOhms. It operates within a temperature range of -55°C to +125°C. The device utilizes a 0805 (2012 metric) surface-mount package with dimensions of 2.0 mm length, 1.25 mm width, and 0.85 mm height.

Chip Ferrite Bead Feature Summary

• AEC-Q200 qualified for automotive reliability requirements
• High impedance performance for effective noise suppression
• Compact 0805 surface-mount footprint for space-constrained designs

Chip Ferrite Bead Applications

• Automotive safety systems
• Automotive powertrain circuits
• General automotive electronics

Chip Ferrite Bead Procurement Notes

Verify the complete part number including suffixes to ensure correct impedance and packaging specifications. Confirm AEC-Q200 certification status if automotive qualification is required. Check RoHS compliance details against specific regional regulations. Validate operating temperature ranges match application environmental conditions. Review datasheet for recommended soldering profiles to prevent thermal damage during assembly.

Chip Ferrite Bead Selection Notes

Select this component when high impedance at 100 MHz is required for noise filtering in automotive environments. Ensure the 200 mA current rating exceeds the maximum expected DC load to prevent saturation. Consider the 0805 package size for board layout constraints. Verify that the 800 mOhm DC resistance meets voltage drop requirements in the circuit design. Confirm compatibility with automated surface-mount assembly processes.

Chip Ferrite Bead Part Context

This component belongs to the Murata EMIFIL BLM21 series, specifically engineered for automotive use. The BLM21H1 designation indicates its classification within the manufacturer's automotive ferrite bead lineup. It serves as a passive EMI suppression element, converting high-frequency noise into heat. The product is distinct from general-purpose industrial beads due to its rigorous automotive qualification standards.

Chip Ferrite Bead Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation.