Bidirectional 7.5V TVS in DO-214AA – active production
The SMBJ7.5CAE3/TR13 is a bidirectional Zener TVS diode from Microchip, rated for a reverse standoff voltage of 7.5V and a peak pulse power of 600W (10/1000µs waveform). It clamps transients to a maximum of 12.9V at 46.5A peak pulse current. The 'C' in the part number indicates bidirectional operation, meaning it protects both positive and negative surges — useful on AC-coupled or differential signal lines where polarity isn't fixed.
That's a typical margin for protecting 5V or 3.3V rails from inductive kickback or ESD events. The breakdown voltage range starts at 8.33V minimum, so it won't conduct during normal 7.5V operation. It's surface-mount, so it reflows with standard solder profiles.
Microchip lists this part as Active. For a BOM line, that's one less obsolescence worry during the design phase.