BLM18HB121SZ1D

Chip Ferrite Bead Overview

The Murata BLM18HB121SZ1D is a surface-mount ferrite bead designed for electromagnetic interference suppression. It features a 0603 (1608 metric) package with dimensions of 1.6 mm length, 0.8 mm width, and 0.6 mm height. The component provides an impedance of 120 Ohms at a test frequency of 100 MHz with a tolerance of ±25%. It supports a maximum DC current of 200 mA and has a maximum DC resistance of 180 mOhms. The device operates within a temperature range of -55°C to +125°C and holds AEC-Q200 qualification.

Chip Ferrite Bead Feature Summary

• Provides high-impedance attenuation for high-frequency noise in compact surface-mount form factors
• Engineered for automotive reliability through AEC-Q200 component qualification standards
• Optimized for low DC resistance to minimize power loss in sensitive signal lines

Chip Ferrite Bead Applications

• Automotive electronic circuit noise suppression
• High-speed digital signal line filtering
• Power supply output decoupling

Chip Ferrite Bead Procurement Notes

Verify the specific suffix 'SZ1D' against official Murata documentation to confirm the exact impedance tolerance and packaging configuration. Ensure the selected variant meets the required 200 mA current rating for the target application. Confirm RoHS compliance status directly from the manufacturer's datasheet before finalizing procurement specifications.

Chip Ferrite Bead Selection Notes

Select this component when space constraints require a 0603 footprint but higher current handling than standard variants allows. Compare the 120 Ohm impedance profile against system noise frequencies to ensure effective attenuation. Evaluate the 200 mA current limit against peak load requirements to prevent saturation or thermal issues during operation.

Chip Ferrite Bead Part Context

This part belongs to the Murata BLM18 series of chip ferrite beads, which are widely used for EMI suppression in portable and automotive electronics. The HB designation typically indicates specific material characteristics optimized for higher current capabilities compared to lower-rated counterparts in the same physical package size.

Chip Ferrite Bead Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source data. Verify compatibility with alternative Murata series such as BLM18AG or BLM18KG only if their electrical parameters strictly match the 120 Ohm impedance and 200 mA current requirements.