782851212

Overview

The Würth Elektronik 782851212 is a surface-mount ferrite bead from the WE-CBA series, designed for EMI suppression in compact electronic assemblies. Housed in an 0805 (2012 metric) package with dimensions of 2.0 mm x 1.25 mm x 0.9 mm, it provides high impedance to suppress electromagnetic interference. The component exhibits an impedance of 2000 Ω at 100 MHz and supports a DC nominal current of 400 mA with a maximum DC resistance of 0.42 Ω. It operates within a temperature range of -55°C to +125°C and holds AEC-Q200 qualification for automotive reliability.

Feature Summary

• Provides effective electromagnetic interference (EMI) suppression through high impedance characteristics at target frequencies.
• Features a compact 0805 surface-mount footprint suitable for space-constrained printed circuit board layouts.
• Qualified under AEC-Q200 standards to ensure reliability in demanding automotive electronic environments.

Applications

• Automotive electronics requiring AEC-Q200 qualified components
• High-speed data lines for noise filtering
• Power supply output stages for EMI reduction

Procurement Notes

Verify the specific ordering code against the manufacturer's datasheet to confirm package type and impedance tolerance. Ensure the selected variant matches the required DC current rating and impedance specifications for the target application frequency. Confirm RoHS compliance status and packaging format availability directly with authorized distributors prior to order placement.

Selection Notes

Select this component when high impedance is required in a minimal surface-mount footprint. The 0805 case size balances performance with assembly density. Consider the 400 mA current rating and 0.42 Ω DC resistance to ensure compatibility with the circuit's power budget. The AEC-Q200 qualification makes it suitable for automotive applications where component reliability is critical.

Part Context

This ferrite bead belongs to the WE-CBA series, which focuses on providing reliable EMI suppression solutions in small form factors. The series is engineered for surface-mount technology, allowing for automated assembly processes. The 782851212 model specifically targets applications needing significant attenuation of high-frequency noise while maintaining low DC resistance to minimize power loss in the signal path.

Replacement Considerations

Cross-reference with other 0805 ferrite beads offering 2000 Ω impedance at 100 MHz. Verify that substitute components meet the same AEC-Q200 automotive qualification if used in vehicle systems. Ensure equivalent current handling and physical dimensions are maintained to fit existing PCB footprints without modification.