1500W peak pulse — what the ratings mean for the rail
The 1.5SMC10AS_R1_00001: The 103 A peak pulse current (Ipp) at that waveform tells you the diode can dump a substantial surge without failing short. Reverse standoff voltage is 8.55 V typical — the DC rail it protects should stay at or below this level in normal operation. Breakdown triggers at 9.5 V minimum; clamping clamps at 14.5 V maximum. That 5.95 V window between standoff and clamp is the margin the downstream circuitry must survive.
DO-214AB SMC — board-fit and reflow note
Housed in a DO-214AB (SMC) surface-mount package — the same footprint as the standard SMC diode. The supplier device package is SMC (DO-214AB), which means the pad layout is shared across the 1.5SMC family. Tape & Reel packaging is the default for volume pick-and-place. Power line protection is not claimed (No per the spec), so this is a signal-rail or low-voltage power-bus protector, not a mains-side suppressor.