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The Würth Elektronik 74279220800 is a single-line ferrite bead from the WE-MPSB series, designed for surface-mount assembly in the 0805 (2012 metric) package. It provides an impedance of 80 Ohms at 100 MHz and supports a maximum DC current of 4A with a maximum DC resistance of 18 milliohms. The component operates within a temperature range of -55°C to +125°C and measures 2.00mm x 1.20mm x 1.10mm.
Verify the specific ordering suffix to confirm packaging type, such as tape and reel or cut tape, as these affect handling but not electrical function. Confirm RoHS compliance status through official documentation. Ensure the selected variant matches the required automotive grade certification if used in regulated environments.
Select this component when high current capacity is required alongside effective high-frequency noise attenuation. The low DCR makes it appropriate for power rails where efficiency is critical. Verify that the 0805 footprint fits the PCB layout constraints and that the thermal performance meets the operating environment requirements.
This part belongs to the WE-MPSB multilayer power suppression bead family. These components are engineered specifically for automotive applications requiring robust EMI suppression in compact form factors. The series offers various impedance and current ratings to suit different power distribution network needs.
Check for direct substitutes within the same WE-MPSB series with matching impedance and current ratings. Cross-reference other manufacturers' 0805 ferrite beads ensuring equivalent AEC-Q200 qualification and thermal characteristics.