742792025

Overview

The Würth Elektronik 742792025 is a WE-CBF series SMT EMI suppression ferrite bead designed for power line filtering. It features a single-line configuration in an 0805 (2012 metric) surface-mount package with dimensions of 2.00mm x 1.20mm x 1.10mm maximum height. The component provides an impedance of 120 Ohms at 100 MHz and supports a rated current of 5A. Its maximum DC resistance is 20 milliohms, ensuring low insertion loss in high-current applications. It operates within a temperature range of -55°C to +125°C and holds AEC-Q200 automotive qualification.

Feature Summary

• Provides effective electromagnetic interference suppression on power lines through high-impedance characteristics at target frequencies.
• Capable of handling high continuous currents up to 5A with minimal voltage drop due to low DC resistance.
• Automotive-grade reliability certified under AEC-Q200 standards for harsh environment durability.
• Compact 0805 footprint allows for dense PCB layout integration while maintaining thermal stability.

Applications

• Power input filtering in automotive electronic control units
• EMI suppression for high-current DC power rails in industrial equipment
• Noise reduction in vehicle infotainment and body control modules
• Filtering applications in automotive sensor interfaces requiring robust current handling

Procurement Notes

Verify the specific ordering suffix to confirm packaging type, such as tape and reel or cut tape, as these affect handling procedures. Ensure the procurement documentation explicitly states AEC-Q200 compliance if automotive validation is required. Cross-reference the manufacturer part number against official distributor catalogs to confirm current production status and avoid obsolete stock. Confirm RoHS3 compliance details are included in the certificate of conformity for regulatory adherence.

Selection Notes

Select this component when designing circuits that require significant current handling capacity alongside EMI filtering. The 5A rating makes it suitable for primary power paths rather than signal lines. Consider the 120 Ohm impedance profile at 100 MHz to ensure it matches the noise frequency spectrum of the application. The 0805 package size offers a balance between current capability and board space efficiency compared to larger packages.

Part Context

This component belongs to the Würth Elektronik WE-CBF family of surface-mount ferrite beads. The series is engineered specifically for EMI suppression in compact electronic designs. The 742792025 variant represents a high-current option within this lineup, distinguished by its 5A rating and low DC resistance. It complements other WE-CBF parts that offer varying impedance and current ratings for different circuit requirements.

Replacement Considerations

Direct substitutes must match the 0805 package, 5A current rating, and 120 Ohm @ 100 MHz impedance. Verify that any alternative component also holds AEC-Q200 certification if used in automotive contexts. Check that the replacement maintains similar DC resistance to prevent excessive power loss. Consult manufacturer cross-reference lists for validated equivalents.