BLM03PX121SZ1D

Chip Ferrite Bead Overview

The Murata BLM03PX121SZ1D is a surface-mount chip ferrite bead from the BLM03_SZ series, housed in a compact 0201 (0603 metric) package with dimensions of 0.6mm length, 0.3mm width, and 0.3mm height. It provides an impedance of 120Ω at 100MHz, with specific values of 55.6Ω at 25MHz, 87.5Ω at 50MHz, 178Ω at 300MHz, and 187Ω at 1GHz. The component supports a maximum DC current of 900mA and features a maximum DC resistance of 160mΩ. It operates within a temperature range of -55°C to +125°C and holds AEC-Q200 automotive qualification.

Chip Ferrite Bead Feature Summary

• Provides high-frequency noise suppression by functioning nearly as a resistor across the targeted frequency spectrum.
• Designed for surface-mount assembly in space-constrained applications using a standard 0201 footprint.
• Certified to AEC-Q200 standards for reliability in demanding automotive electronic environments.

Chip Ferrite Bead Applications

• Automotive infotainment systems
• General automotive electronics circuits
• High-density surface-mount PCB layouts

Chip Ferrite Bead Procurement Notes

Verify the complete part number including suffixes to ensure correct impedance and current ratings. Confirm package dimensions match design constraints. Check for AEC-Q200 certification if automotive use is required. Validate operating temperature ranges against system specifications. Ensure compatibility with reflow soldering profiles.

Chip Ferrite Bead Selection Notes

Select this component when space is limited due to its 0201 size. Choose based on the 120Ω impedance requirement at 100MHz. Consider the 900mA current rating for power line filtering. Verify thermal performance within the specified -55°C to +125°C range. Ensure the low DC resistance meets voltage drop requirements.

Chip Ferrite Bead Part Context

This ferrite bead belongs to Murata's BLM03 series, which focuses on miniaturized noise suppression solutions. The SZ suffix indicates specific characteristics within this family. These components are widely used in modern electronics where small form factors and effective EMI control are critical.

Chip Ferrite Bead Replacement Considerations

Check for other BLM03 series variants with similar impedance but different current ratings. Compare physical dimensions to ensure board compatibility. Verify equivalent AEC-Q200 certification status for automotive replacements.

Chip Ferrite Bead FAQ

What is the impedance value at 100MHz?

The impedance is 120Ω at 100MHz.

Is this component suitable for automotive applications?

Yes, it is qualified under the AEC-Q200 standard for automotive electronics.

What is the maximum DC current rating?

The maximum DC current rating is 900mA.