What the 1500W rating means on the bench
The 1.5SMC18AHR7G: The 15.3V reverse standoff means it sits across a 12V or 15V rail and stays out of the way until a transient pushes past 17.1V breakdown; then it clamps at 25.5V max. That's the protection window for an automotive ECU or a 12V battery-fed module.
AEC-Q101 and the automotive qualification story
The 1.5SMC series is a known DO-214AB footprint; the HR7G suffix indicates the tape-and-reel packaging for automated pick-and-place.
