MLS0402-4S4-121

Overview

The Ferroxcube MLS0402-4S4-121 is a surface-mount multilayer ferrite bead designed for high-frequency noise suppression in compact electronic circuits. It features a 0402 (1005 Metric) package with dimensions of 1.0mm length, 0.5mm width, and 0.5mm height. The component provides an impedance of 120 Ohms at 100 MHz and supports a DC current rating of 200 mA. Its low DC resistance of 500 mOhm ensures minimal signal loss while effectively attenuating electromagnetic interference.

Feature Summary

• Multilayer construction enables effective common-mode and differential-mode noise suppression in dense PCB layouts
• Compact 0402 footprint allows integration into space-constrained portable and peripheral devices
• High impedance characteristic at 100 MHz targets broadband radio frequency interference

Applications

• Motherboard signal line filtering
• Notebook computer peripheral interfaces
• CD-ROM and DVD-ROM drive circuits

Procurement Notes

Verify the exact impedance tolerance and DC resistance values against the manufacturer's official datasheet before finalizing design specifications. Ensure the selected package size matches the PCB land pattern requirements. Confirm that the 200 mA current rating meets the operational load conditions of the target circuit to prevent saturation or excessive heating during continuous use.

Selection Notes

Select this component when space constraints necessitate a 0402 package size while requiring significant high-frequency attenuation. The 120 Ohm impedance at 100 MHz makes it suitable for suppressing noise on digital signal lines where lower impedance beads would be ineffective. Consider the 500 mOhm DC resistance impact on power integrity if used in sensitive analog supply paths.

Part Context

This part belongs to the Ferroxcube MLS series of multilayer suppressors, which are engineered for EMI/RFI mitigation in consumer electronics. The series offers various impedance values and package sizes to accommodate different circuit requirements. The MLS0402 variant specifically addresses the need for miniaturization in modern handheld and computing devices.

Replacement Considerations

Cross-reference with other 0402 ferrite beads offering similar 120 Ohm impedance at 100 MHz and comparable current ratings. Verify pin compatibility and thermal characteristics if substituting with components from different manufacturers to ensure equivalent performance in the specific application environment.