78279224171

Overview

The Würth Elektronik 78279224171 is a surface-mount ferrite bead from the WE-MPSA series, designed for EMI suppression in high-current applications. It features a 2220 (5550 metric) package and offers an impedance of 170 ohms at 10 MHz. The component supports a maximum DC current rating of 4 A with a maximum DC resistance of 15 milliohms. It operates within a temperature range of -55°C to +125°C and holds AEC-Q200 qualification for automotive reliability.

Feature Summary

• Provides effective electromagnetic interference suppression through high impedance characteristics
• Engineered for high-current handling capabilities suitable for power line filtering
• Automotive-grade construction ensuring reliability under demanding thermal conditions

Applications

• Automotive electronics systems requiring EMI filtering
• Power supply output lines for noise reduction
• High-speed digital signal lines susceptible to interference

Procurement Notes

Verify the specific impedance frequency specification against your design requirements, as sources indicate 170 ohms at 10 MHz. Confirm that the 2220 package dimensions fit your PCB layout constraints. Ensure the 4 A current rating meets the operational load of the target circuit. Check for AEC-Q200 certification if the application mandates automotive grade components. Validate the 15 milliohm DC resistance to ensure minimal voltage drop in the power path.

Selection Notes

Select this component when high current capacity is required alongside significant EMI attenuation. The low DC resistance minimizes power loss compared to resistive alternatives. The wide operating temperature range makes it suitable for harsh environments. Consider the physical size of the 2220 package during layout planning. This part is appropriate for applications where standard ferrite beads may saturate or overheat due to high DC bias currents.

Part Context

This ferrite bead belongs to the WE-MPSA series, which focuses on multi-layer chip ferrite beads for power applications. The series is characterized by its ability to handle high DC currents while maintaining effective noise suppression. Würth Elektronik designs these components to meet stringent automotive standards, ensuring long-term stability and performance in critical electronic systems.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation.