742792043

Overview

The Wurth Elektronik part number 742792043 is a surface-mount EMI suppression ferrite bead belonging to the WE-CBF series. It utilizes an 0805 (2012 metric) package with dimensions of 2 mm length, 1.2 mm width, and 0.9 mm height. The component provides an impedance of 600 Ohms at a test frequency of 190 MHz with a tolerance of ±25%. It supports a maximum DC current of 200 mA and features a maximum DC resistance of 0.65 Ohms. The device operates within a temperature range of -55°C to +125°C and holds AEC-Q200 qualification for automotive applications.

Feature Summary

• AEC-Q200 qualified for automotive reliability standards
• Compact 0805 surface-mount footprint for space-constrained designs
• High impedance performance at 190 MHz for effective noise suppression

Applications

• Automotive electronic circuit protection
• EMI suppression in high-frequency signal lines
• Power supply filtering in compact devices

Procurement Notes

Verify the specific impedance frequency rating against design requirements, as this model specifies 600 Ohms at 190 MHz rather than the standard 100 MHz reference point. Confirm that the 200 mA current rating aligns with the operational load to prevent saturation. Ensure the 0805 package size fits the PCB layout constraints. Check RoHS compliance status for environmental regulations.

Selection Notes

Select this component when high-frequency noise attenuation around 190 MHz is required in automotive or industrial settings. The low DC resistance minimizes power loss, while the AEC-Q200 certification ensures durability under thermal stress. Consider the 200 mA limit for current-heavy circuits; higher current needs may require parallel configurations or larger packages from the same series.

Part Context

This ferrite bead is part of the WE-CBF series by Wurth Elektronik, designed specifically for SMD EMI suppression. The series offers various impedance values and current ratings within standardized footprints. The 742792043 variant targets applications needing precise high-frequency filtering with automotive-grade reliability, fitting into the broader portfolio of chip beads for noise control.

Replacement Considerations

Cross-reference other WE-CBF series parts with similar 0805 footprints and comparable impedance-current trade-offs. Verify that substitute components meet the same AEC-Q200 qualification and thermal operating range if used in automotive contexts.