Z0805C420APWST

Overview

The KEMET Z0805C420APWST is a surface-mount power line ferrite bead designed for EMI suppression in high-current applications. It features a 0805 (2012 metric) package with an impedance of 42 ohms at 100 MHz. The component utilizes a composite material construction to provide effective attenuation of both radiated and conductive noise on power lines. It is rated for a maximum DC current of 3.0 A, ensuring stable performance under significant load conditions without saturation. The device offers low DC resistance to minimize power loss and voltage drop within the circuit.

Feature Summary

• Provides effective filtering for radiated and conductive noise on power lines
• Composite material construction ensures stability under high DC bias currents
• Low DC resistance minimizes power dissipation and voltage drop

Applications

• Power supply input/output filtering
• DC-DC converter output stages
• High-speed digital signal line protection

Procurement Notes

Verify the specific impedance tolerance and current rating against the official KEMET datasheet before integration. Confirm that the 0805 package dimensions align with your PCB footprint design. Ensure the selected variant matches the required DC current capacity for your specific application to prevent thermal issues or performance degradation during operation.

Selection Notes

Select this component when space constraints require a compact 0805 footprint but high current handling is necessary. Compare its impedance profile and DC resistance against alternative ferrite beads to ensure optimal noise suppression characteristics for your specific frequency range. Consider the thermal management requirements associated with the 3.0 A current rating in your final design validation.

Part Context

This part belongs to KEMET's Z-PWS series of power line ferrite chip beads. These components are engineered specifically for power integrity applications where standard signal-line ferrites may saturate. The series provides a solution for suppressing electromagnetic interference in compact electronic devices requiring robust noise filtering capabilities.

Replacement Considerations

Consult KEMET documentation for direct cross-references. Verify that any substitute maintains the 42-ohm impedance at 100 MHz and supports at least 3.0 A DC current. Ensure the replacement component fits the same 0805 mechanical envelope and meets equivalent thermal and electrical specifications.