14V rail TVS — Zener clamp in DO-214AA
With a reverse standoff voltage of 14V and a minimum breakdown voltage of 15.6V, it sits on a 12V or 14V supply line and begins conducting only when the rail exceeds the normal operating window.
Peak pulse rating and temperature range
The 600W rating is specified for a 10/1000µs exponential waveform; real-world surge energy depends on the actual pulse shape and duty cycle. It is a single unidirectional channel — for bipolar or AC signal lines you would need a bidirectional variant in the same SMBJ family.
The base product number SMBJ14 covers multiple package and screening variants; the AE3 suffix indicates the standard screening level. Because it is active and the family is widely second-sourced, spot-market shortages are rare.