AEC-Q101 TVS for 12V/24V automotive bus clamping
The SMAJ43CAQ-13-F: The 43V standoff voltage sits above a 24V nominal bus (including load-dump transients up to 36V), so the TVS remains transparent during normal operation and only clamps when the line exceeds the breakdown threshold of 47.8V min.
Housed in a DO-214AC (SMA) surface-mount package, the SMAJ43CAQ-13-F uses the standard JEDEC footprint with a cathode band on the body — the bidirectional construction means polarity marking is for orientation only, not electrical function.
For BOM redundancy, confirm the DO-214AC footprint and 43V standoff with an alternative supplier's equivalent series.