Active production and BOM-fit for the SMAJ18AQ-13-F
The 18V reverse standoff means the protected line sees no leakage at 18V continuous; the avalanche breakdown starts at 20V minimum, so a 24V nominal rail is too high — this part is sized for 12V or 18V signal/data lines, not power buses.
AEC-Q101 automotive qualification — what it certifies for the BOM
The Automotive, AEC-Q101 series designation certifies this TVS for automotive-grade stress screening: temperature cycling, high-temperature reverse bias, and ESD robustness per the AEC-Q101 qualification standard. Applications are listed as Automotive — suitable for clamping transients on CAN bus, LIN bus, sensor lines, and low-voltage data interfaces in vehicle electronics.
DO-214AC SMA package — board-level integration note
Housed in the DO-214AC (SMA) package with surface mount mounting, the SMAJ18AQ-13-F mates with standard SMA footprints — the cathode band on the package body orients the unidirectional channel. The supplier device package is SMA — the same mechanical outline as other SMA-packaged TVS diodes, so a board layout for a competitive SMA TVS accepts this part without a footprint change. Power line protection is marked No — this is a signal/data-line protector, not a primary power rail clamp; the 400W rating at 10/1000µs is typical for secondary protection on I/O lines.