BLM18HB221SZ1D

Chip Ferrite Bead Overview

The BLM18HB221SZ1D is a single-line chip ferrite bead manufactured by Murata Electronics, designed for surface-mount technology in the 0603 (1608 metric) package. It provides an impedance of 220 Ohms at a test frequency of 100 MHz with a tolerance of 25%. The component supports a maximum DC current of 1.4 A and features a maximum DC resistance of 100 mOhms. It operates within a temperature range of -55°C to +125°C and has physical dimensions of 1.6 mm length, 0.8 mm width, and 0.8 mm height.

Chip Ferrite Bead Feature Summary

• Provides high-impedance noise suppression for signal lines in compact surface-mount designs
• Engineered for automotive-grade reliability under wide thermal operating conditions
• Optimized low DC resistance minimizes voltage drop in power distribution paths

Chip Ferrite Bead Applications

• Automotive electronic systems requiring EMI suppression
• Power supply input filtering circuits
• High-speed digital signal line protection

Chip Ferrite Bead Procurement Notes

Verify the specific suffix 'HB' against official Murata documentation to confirm the exact electrical characteristics, particularly the 1.4 A current rating and 100 mOhm resistance values. Ensure the ordering part number matches the required package size and impedance specifications before procurement to avoid functional mismatches in circuit design.

Chip Ferrite Bead Selection Notes

Select this component when a 0603 footprint is required for noise suppression with moderate current handling capabilities. Compare the 1.4 A saturation limit against peak circuit currents to prevent performance degradation. Consider the 220 Ohm impedance profile relative to the target noise frequencies for effective attenuation without excessive signal loss.

Chip Ferrite Bead Part Context

This component belongs to the Murata BLM18 series of ferrite beads, which are widely used for electromagnetic interference suppression in portable and automotive electronics. The BLM18 series offers various impedance and current ratings within the standard 0603 package, allowing designers to balance noise filtering efficiency with power delivery requirements in space-constrained applications.

Chip Ferrite Bead Replacement Considerations

Cross-reference with other Murata BLM18 variants such as BLM18HG or BLM18HH if different current ratings are needed. Verify that substitute parts maintain the same 0603 footprint and 220 Ohm impedance at 100 MHz to ensure compatibility with existing PCB layouts and circuit performance targets.