742792903

Overview

The Würth Elektronik 742792903 is a surface-mount EMI suppression power ferrite bead from the WE-PF series. It provides an impedance of 340 ohms at a test frequency of 100 MHz and supports high current ratings up to 10 A. The component utilizes a two-terminal SMD package with J-leads, measuring 6.3 mm in length, 5.0 mm in width, and 3.8 mm in height. It operates within a temperature range of -55°C to +125°C and complies with RoHS standards.

Feature Summary

• Designed for high-current applications supporting up to 10 A
• Provides effective EMI suppression in switch mode power supplies
• Features a robust SMD package with J-leads for secure mounting

Applications

• Switch mode power supplies (SMPS)
• Power electronics circuits
• High current DC-DC converter outputs

Procurement Notes

Verify the specific impedance value and current rating against the official datasheet before integration. Confirm that the J-lead package dimensions match the target PCB footprint. Ensure the operating temperature range meets the environmental requirements of the final assembly. Cross-reference the manufacturer part number to avoid confusion with similar WE-PF variants.

Selection Notes

Select this component when circuit designs require significant current handling capability alongside noise suppression. The 10 A rating distinguishes it from standard signal ferrites. Consider the physical size constraints due to the larger SMD package. Evaluate the 340 ohm impedance profile to ensure it aligns with the targeted noise frequencies in the power line.

Part Context

This part belongs to the WE-PF series, which specializes in power ferrite beads for demanding electronic environments. Unlike standard signal ferrites, this series is engineered to maintain performance under high direct current loads without saturation. It serves as a critical passive component for maintaining signal integrity in power distribution networks.

Replacement Considerations

Check for alternative parts within the same WE-PF series that offer compatible impedance and current ratings. Verify that any substitute maintains the same J-lead package style to ensure mechanical compatibility. Compare thermal characteristics and maximum operating temperatures to guarantee equivalent reliability in the application.