The SMAJ16AQ-13-F is a 400W peak pulse power Zener TVS with a 16V reverse standoff voltage, meaning it sits across a 12V nominal automotive rail and stays transparent until a transient exceeds 17.8V breakdown. At the 15.3A peak pulse current (10/1000µs waveform), the voltage clamps at 26V max — that 26V ceiling is what the downstream IC must survive.
Automotive AEC-Q101 — still active for new designs
It is suitable for new vehicle programs and existing BOM lines alike.
DO-214AC (SMA) — rework-friendly footprint
Housed in a DO-214AC (SMA) surface-mount package, the SMAJ16AQ-13-F reworks cleanly under hot air — the body is small enough that the pad heats evenly without cooking the board, and the cathode band makes orientation unambiguous.