BLM18SP221SN1D

Chip Ferrite Bead Overview

The Murata BLM18SP221SN1D is a single-channel ferrite chip bead in a 0603 (1608 metric) surface-mount package. It provides an impedance of 220 Ohms with a tolerance of ±25%. The component supports a maximum DC current of 2.8 A and has a maximum DC resistance of 48 mOhms. It operates within a temperature range of -55°C to +125°C. Physical dimensions are 1.6 mm length, 0.8 mm width, and 0.6 mm height.

Chip Ferrite Bead Feature Summary

• Designed to function as a resistor at noise frequencies to reduce resonance possibilities
• High current handling capability suitable for power line applications
• Compact 0603 surface-mount form factor

Chip Ferrite Bead Applications

• Power line noise suppression
• DC-DC converter output filtering
• General purpose EMI suppression in compact circuits

Chip Ferrite Bead Procurement Notes

Verify the specific suffix SN1D against official Murata documentation to confirm packaging and tape specifications. Ensure the selected variant matches the required 2.8A rating and 220 Ohm impedance for the target application. Cross-reference the manufacturer part number directly with the datasheet to avoid confusion with similar series components.

Chip Ferrite Bead Selection Notes

Select this component when high current capacity is required alongside moderate impedance in a small footprint. The 2.8A rating distinguishes it from lower-current variants in the same impedance class. Verify that the 48 mOhms DC resistance meets the voltage drop requirements of the circuit design under maximum load conditions.

Chip Ferrite Bead Part Context

This part belongs to the EMIFIL BLM18SP series, which focuses on high-current performance. It utilizes Murata's proprietary technology to maintain stability under significant DC bias while providing effective attenuation of high-frequency noise signals in power distribution networks.

Chip Ferrite Bead Replacement Considerations

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