BLM18BA121SZ1D

Chip Ferrite Bead Overview

Murata BLM18BA121SZ1D is a surface-mount chip ferrite bead in the BLM18BA series, designed for EMI suppression. It features a 0603 (1608 metric) package with dimensions of 1.60 x 0.80 mm and a height of 0.80 mm. The component provides an impedance of 120 Ω at 100 MHz with a tolerance of ±25%. It has a maximum DC resistance of 900 mΩ and supports a rated current of 200 mA. Operating temperatures range from -55°C to +125°C. The device meets RoHS3 standards and carries an MSL rating of 1.

Chip Ferrite Bead Feature Summary

• Provides high-frequency noise suppression in power supply circuits
• Suitable for use in high-speed signal lines
• Compact surface-mount design for space-constrained applications

Chip Ferrite Bead Applications

• EMI suppression filters
• High-speed signal lines
• Power supply circuits

Chip Ferrite Bead Procurement Notes

Verify the specific suffix 'SZ1D' against official Murata documentation to confirm packaging details and material specifications. Ensure compatibility with standard SMT reflow profiles. Confirm availability status as distribution channels may vary. Cross-reference datasheet revisions to ensure compliance with current environmental regulations such as RoHS3.

Chip Ferrite Bead Selection Notes

Select this component when a 120 Ω impedance at 100 MHz is required for noise filtering. The 200 mA current rating limits suitability for high-power rails; verify circuit load currents do not exceed this limit to prevent saturation or overheating. The 0603 footprint requires appropriate PCB land pattern design. Consider thermal dissipation capabilities within the operating temperature range.

Chip Ferrite Bead Part Context

The BLM18BA series represents Murata's line of general-purpose chip ferrite beads. These components utilize soft ferrite materials to absorb electromagnetic interference. The BLM18BA variant specifically targets consumer electronics and general industrial applications requiring compact EMI solutions. It is part of a broader family offering various impedance values within the same physical footprint.

Chip Ferrite Bead Replacement Considerations

BLM18BA121SN1D offers identical electrical characteristics but may differ in packaging or tape-and-reel specifications. BLM18AG121SH1D shares similar impedance but has different current handling and DC resistance parameters. Verify pinout and mechanical dimensions before substitution.