742861118

Overview

The Würth Elektronik 742861118 is a surface-mount ferrite bead from the WE-CBF HF Series, designed for high-frequency noise suppression in compact electronic circuits. Housed in a standard 0603 [1608 Metric] package, this component provides an impedance of 180 ohms at 100 MHz and 300 ohms at 300 MHz. It features a DC resistance of 0.55 ohms and supports a maximum DC current rating of 200 mA. The device offers excellent anti-EMI properties with low DC resistance, allowing direct placement on printed circuit boards to effectively filter electromagnetic interference.

Feature Summary

• Provides effective high-frequency noise attenuation through specialized SMD chip bead construction
• Features low DC resistance to minimize signal loss while maintaining strong EMI suppression capabilities
• Designed for direct surface mounting on printed circuit boards to save space

Applications

• High-speed digital signal line filtering
• Power supply output noise suppression
• General EMI/RFI mitigation in compact electronics

Procurement Notes

Verify the specific impedance tolerance and current ratings against the official datasheet before integration. Confirm that the 0603 footprint matches your PCB layout constraints. Ensure the selected component meets the required thermal performance standards for your operating environment. Cross-reference the manufacturer's part number to avoid counterfeit or obsolete stock issues during sourcing.

Selection Notes

Choose this component when space is limited due to its small 0603 form factor. Select based on the required impedance profile at target frequencies, specifically noting the 180 ohm value at 100 MHz. Consider the 200 mA current limit for power integrity. Evaluate the low DC resistance benefit for sensitive signal lines where voltage drop must be minimized.

Part Context

This ferrite bead belongs to the WE-CBF HF Series, which focuses on high-frequency performance for modern high-density electronics. The series utilizes advanced materials to achieve stable impedance characteristics across a broad frequency range. It complements other passive components in the Wurth portfolio by addressing specific EMI challenges in RF and high-speed digital applications.

Replacement Considerations

Check for equivalent parts within the same WE-CBF HF series with different impedance values if filtering requirements change. Verify compatibility with alternative manufacturers offering similar 0603 ferrite beads, ensuring matching impedance curves and current ratings.