FN402-1-02 footprint, schematic symbol and 3D model by Schaffner

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FN402-1-02 Details

The maximum operating temperature range for the FN402-1-02 is -40°C to 100°C, with a derating of 1.5% per Kelvin above 80°C.
To ensure proper grounding, connect the grounding pin of the FN402-1-02 to a low-impedance ground point on the PCB, and ensure that the ground plane is not interrupted by any slots or cutouts.
The recommended PCB layout for the FN402-1-02 involves placing the filter as close as possible to the power entry point, with the input and output traces separated by a ground plane to minimize electromagnetic interference (EMI).
Yes, the FN402-1-02 can be used in a redundant power supply configuration, but it's essential to ensure that the filters are properly synchronized to prevent any potential resonance issues.
To troubleshoot common mode noise issues, check the PCB layout for any potential noise coupling paths, ensure proper grounding, and verify that the filter is properly installed and connected.

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