BLM21BD182SN1D

Chip Ferrite Bead Overview

The Murata BLM21BD182SN1D is a single-line ferrite chip bead designed for electromagnetic interference suppression. It features an impedance of 1.8 kOhms at a test frequency of 100 MHz with a tolerance of 5%. The component operates within a maximum DC current of 250 mA and has a maximum DC resistance of 500 mOhms. It utilizes SMD/SMT termination and is housed in an 0805 (2012 metric) package measuring 2.0 mm x 1.25 mm x 0.85 mm. The device supports an operating temperature range from -55°C to +125°C.

Chip Ferrite Bead Feature Summary

• Provides high-impedance attenuation for noise suppression in signal lines
• Monolithic construction ensures reliability in surface-mount applications
• Supports operation across extended industrial temperature ranges

Chip Ferrite Bead Applications

• Portable communication devices
• Personal computers and peripherals
• Video equipment

Chip Ferrite Bead Procurement Notes

Verify the specific suffix 'SN1D' against official Murata documentation to confirm the 5% impedance tolerance, as variations exist within the series. Ensure the selected packaging format matches production requirements. Confirm RoHS compliance status through the manufacturer's latest datasheet before integration into regulated assemblies.

Chip Ferrite Bead Selection Notes

Select this component when a 1.8 kOhm impedance at 100 MHz is required for EMI filtering in compact designs. The 0805 footprint accommodates standard surface-mount processes. Evaluate the 250 mA current rating against the circuit's operational load to prevent saturation. Consider the low DC resistance to minimize voltage drop in sensitive signal paths.

Chip Ferrite Bead Part Context

This part belongs to the EMIFIL BLM21 series of monolithic ferrite beads manufactured by Murata Electronics. The series is engineered for use in portable electronics and computing hardware where space constraints are critical. The BLM21BD variant specifically targets general-purpose noise suppression in digital signal lines.

Chip Ferrite Bead Replacement Considerations

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